Home

MOSFIRE Requirements v1.0 - UCLA Infrared Laboratory

1. Parameter Goal Min Max Units Notes Image quality Imaging lt 0 25 0 36 arcseconds 1 3 Spectroscopy gt 80 75 ensquared energy 2 3 Guider lt 0 40 arcseconds 4 Non uniformity Imaging lt 10 30 peak 5 Spectroscopy lt 5 10 peak 6 Guider lt 1 2 5 Distortion Guider lt 1 2 peak to peak H Optical throughput Imaging Y band gt 60 50 at 1 00 um 8 J band gt 60 50 at 1 25 um 8 H band gt 50 A0 at 1 65 um 8 K band gt 40 35 at 2 23 um 8 Spectroscopy Y band gt 50 A0 at 1 00 um 8 J band gt 50 40 at 1 25 um 8 H band gt 40 30 at 1 65 um 8 K band gt 35 30 at 2 23 um 8 Guider gt 65 60 at 850 nm 9 Instrument background Y band lt 0 003 0 02 e sec pixel 10 J band lt 0 003 0 02 e sec pixel 10 H band lt 0 003 0 02 e sec pixel 10 K band lt 0 003 0 02 e sec pixel 10 Ghosting Imaging lt 107 210 11 Spectroscopy lt 107 SNE 11 Notes 1 Area weighted average rms diameter over the wavelength range of 0 95 to 2 45 um N Ensquared energy in a 2 x 2 pixel box centered on the image centroid over the wavelength range of 0 95 to 2 45 um Achieved in all bands Y J H and K without refocusing the telescope Area weighted average rms diameter over the wavelength range of 0 7 to 1 1 um This is the peak variation in rms diameter over the full FOV This is the peak variation in ensquared energy over the full FOV Total geom
2. 38888 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 9 All software design documents and related documents including but not limited to software build and install procedures source code release description document software design document s software acceptance testing plans and software user s manual All software design documents and related documents shall be supplied in revised form as required to reflect the delivered as built instrument software 10 Safety plan and procedures 16 2 Drawings 16 2 1 Drawing Standards All instrument drawings should use the metric standard with dimensions in millimeters All instrument drawings should conform to the following 1 Drawings for optical components shall conform to ANSI ASME standard Y14 18M 1986 Optical Parts Engineering Drawings and Related Documentation Practices 2 Mechanical drawings shall conform to ANSI Y14 5M 1994 R1999 Dimensioning and Tolerancing and ASME standard Y14 100 2000 Engineering Drawing Practices 3 Each sheet shall conform to ANSI Y14 1 1995 R2002 Decimal Inch Drawing Sheet Size and Format Drawing size shall be determined on an individual basis 4 Each drawing shall have a title block with at least the following information Development group Drawing number Title Designer Draftsman Scale Method for determining next higher assembly 5 A
3. SEET W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 Table of Contents 12 3 3 Standards Implementation Requirement coooonocnnoccnonccononcnonoconoconnnonnnonnncconocnnn conan 71 12 3 4 Regulatory Implementation Requirements oooooocnocccnoccconcconncconocono cono nono noconocnncconnnoos 71 12 4 Design EE 71 12 4 1 Technological Design Requirements sde deed een 71 12 4 2 Regulatory Design Requirements ii da 71 124 3 Standards Related Design Requirement s coccion echados did 71 12 4 4 Integration Related Design Requirements cria 71 13 Reliability A acess ladon cc aracie cvs tatoa ya Gaeanae va aeen east eanceen eee a comuanennt 72 h HEIEREN int id 72 e EEN 72 13 3 Procedure for Reliability Determination 5ccc sicccccsenscsetcascesansesetceendsonencessesuasebateonsesinacs 72 14 Spares EQU a ra 72 15 Service and Maintenance Regurements nono ccoo ncconocnnn cnn ccanncinns 73 16 Documentation Requirements add 74 16 1 Documentation Package iS 74 A A a actus auth A E E a auuoiuanees 75 16 2 11 Drawn Standards EE 75 16 22 GE ERR He 16 3 Electrical Electronic Documentation scx sacces scasacacsdesactcbenseessaaiacds seveckcysteeastegdianavtesiaesssgus 77 A EE 71 17 CU AA A E AAA A 80 vii MOSFIRE Requirements 1_0 doc 3 30 2006 SEET W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 Figures and Tables Figur
4. 65 MOSFIRE Requirements 1_0 doc 3 30 2006 38888 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 11 4 1 2 Image Display The image display facility should be the Quicklook I software developed for OSIRIS and provided with a 2D mode Further requirements for image display software are TBD 11 4 1 3 CSU Configuration A CSU configuration program is required This software should be modeled on the best practices from the processes currently in use at WMKO to design slit masks for the LRIS and DEIMOS instruments The configuration software should also include a feature similar to the DEIMOS DSIMULATOR application for previewing slit mask configurations The MSCGUI should also support the generation of slit configurations during observing although for reasons of efficiency this practice will not be encouraged except for special circumstances such as transient object follow up 11 4 1 4 Data Reduction Pipeline A data reduction pipeline DRP should be provided for use with MOSFIRE science data While there are important differences in near IR observing protocols e g dithering beam switching to cope with OH and detector variability that have to be taken into account the DRP developed for the DEIMOS instrument at WMKO offers a starting point for the development of a MOSFIRE DRP Accordingly it is expected that the DRP for MOSFIRE will be developed from the DEIMOS DRP F
5. Organization Number Title or Standardizing Body WMKO KSD 3 Software Items for Acceptance Review WMKO KSD 8 KTL the Keck Task Library WMKO KSD 46a DCS Keyword Reference Manual partial WMKO KSD 50 Keck UC Style and Coding Standards WMKO KSD 201 How to Set Up a config mk Build WMKO KSD 210 WMKO Software Standards MOSFIRE Requirements_1_0 doc 3 30 2006 5 S W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 3 3 Referenced Drawings Table 3 lists the drawing numbers revisions and date source and title for all drawings referenced in this document Table 3 Referenced Drawings Drawing Revision Date Source Title 1085 C1101 TBD WMKO Keck I Cassegrain Envelope 1085 C1102 TBD WMKO Keck I Cassegrain Instrument Interface 1085 C1203 TBD WMKO Keck I Nasmyth Deck Instrument Interface RT1 Position 199 06 04 B TIW Defining Point Mechanism W M Keck Telescope 640 C0011 D 2 10 05 WMKO Keck I Instrument Stowage Layout 110 10 07 C 6 12 03 WMKO Keck I Telescope Travel Limits 115 05 00 B 3 30 06 WMKO MOSFIRE One Line Diagram 4 REVISION HISTORY Version Date Author Reason for revision remarks 0 1 March 26 2006 SMA Original Issue 1 0 March 30 2006 SMA Incorporate comments Due to the difficulties in documents with moderately complex formatting such as this one the Microsoft Word Track
6. um um um um T 1 1 Open 1 2 1 01 0 12 0 95 1 07 85 Y Spectrometer 1 3 1 25 0 34 1 08 1 42 85 J Spectrometer 1 4 1 65 0 39 1 455 1 845 85 H Spectrometer 1 5 2 225 0 45 2 00 2 45 90 K Spectrometer 1 6 2 15 0 32 1 99 2 31 90 Ks 2 1 Open 2 2 2 12 0 34 1 95 2 29 90 K 2 3 1 02 0 10 0 97 1 07 85 Y Imager 2 4 1 25 0 16 1 17 1 33 85 J Imager 2 5 1 653 0 29 1 49 1 78 85 H Imager 2 6 2 2 0 34 2 03 2 37 90 K Imager Note Min short wavelength half power point Max long wavelength half power point based on the Mauna Kea Observatories Near Infrared Filter Set Simons et al 2002 PASP 114 169 and Tokunaga et al 2002 PASP 114 180 25 MOSFIRE Requirements 1_0 doc 3 30 2006 SET W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 7 2 2 3 Lyot stop A deployable rotating hexagonal cold Lyot stop matched to the Keck I telescope pupil will be provided Under control of the MOSFIRE host computer the stop will be deployed or retracted When deployed the stop will be adjustable in rotation angle to match the hexagonal aperture to the telescope pupil at the current rotator angle During guiding the stop will track the rotator angle so that the hexagonal aperture of the stop remains matched to the telescope pupil 7 2 2 4 Spectrometer Grating The MOSFIRE spectrometer will use a reflection grating that will be interchangeable with a plane
7. 0 8 for 15 000 feet V is the sea level rated working voltage The resulting value for VI must be less than the dielectric withstand test specification voltage 2500 volts AC or a dielectric withstand test at altitude must be performed to ensure that the system is safe for the intended application 9 4 Design Requirements 9 4 1 Technological Design Requirements 9 4 1 1 Motion Control Systems The preferred motion controllers for stepper and servomotors are Galil or Pacific Scientific programmable motion controllers The preferred motion controller for piezo devices tip tilt and focus is the 500 series from Physik Instrumente 9 4 1 2 Power Ratings All power dissipating components to be cooled by free air convection must be derated to 80 of their sea level absolute maximum average power dissipation ratings 9 4 1 3 Wiring and Interconnections 9 4 1 3 1 Connector and Cable Mounting Cable and wiring strain relieves should be designed so that strain relief and wiring integrity is not compromised by opening access doors or removing service access covers Connectors should not be mounted on service access covers or on access doors 9 4 1 3 2 Cable and Wire Routing Cables and wiring must be routed so that they do not interfere with the optical path of the instrument Cables and wiring must be routed so that full travel of moving or adjustable parts is not affected and does not place a strain on the mounting or connections of any cables or w
8. 6 2 1 1 3 8 2 2 2 Configurable Slit Unit The configurable slit unit CSU should meet the performance requirements given in Table 12 at all rotator positions and at all telescope elevation angles The CSU should meet the performance requirements given in Table 12 at the internal opto mechanical operating temperature given in Table 11 See reference 1 for additional details on the performance requirements for the CSU 8 2 2 3 Flexure Correction and Focus Mechanisms Where piezoelectric actuators are used in these mechanisms they should be operated by a closed loop servo in order to eliminate hysteresis 8 2 2 4 Vibration Vibration isolation should be employed as required to isolate sources of vibration within the MOSFIRE Instrument due to moving components such as fans pumps and motors The MOSFIRE Instrument should meet all performance and operating requirements when installed in a vibration environment that conforms to the Generic Vibration Criteria Curve C as shown in Figure 3 The MOSFIRE Instrument should not produce vibrations that result in rms velocities in excess of those given in curve C of Figure 3 Gordon Colin G Generic Criteria for Vibration Sensitive Equipment Proceedings of the SPIE Vol 1619 pp 71 85 Vibration Control in Microelectronics Optics and Metrology Gordon Colin G editor SPIE 1992 ZAS MOSFIRE Requirements 1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Managemen
9. Changes feature is not useable To see the changes in this document since the previous version use the Tools Track Changes Compare Documents drop down menu sequence and compare this document to the previous version It is not recommended that you attempt to print the results Subsequent versions of this document will include the filename and date for the previous version 6 MOSFIRE Requirements 1_0 doc 3 30 2006 O SEET W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 5 BACKGROUND 5 1 Purpose The purpose of the background section of this document is to provide context and related information for the requirements defined in later sections of this document 5 2 Motivation for the Development of MOSFIRE Multi object spectrometers MOSs are required to understand object populations The Keck community has already used the single object near IR spectrometer NIRSPEC to study many young stars galactic center objects high redshift galaxies and star formation in obscured galaxies These observations have revealed much about the properties of small numbers of these objects including numerous important and unique discoveries However detailed knowledge about object populations will elude us until we have hundreds or thousands of near IR spectra of these objects spanning a variety of environments physical conditions etc Many of the most exciting applications of near IR s
10. Charles Steidel CIT The requirements in this document are at a draft level appropriate for the preliminary design phase of the instrument Further development of the requirements will take place in the next phase of the project detailed design In particular parametric performance requirements given at this stage are intended to indicate the scope and format of the requirements but do not in all cases establish final values for the specified parameters In some cases values for these parameters have yet to be established and are given as TBD It is important to understand that at this stage of development the requirements provide a basis for identifying the parameters that will be part of the instrument s specifications but the values given are subject to change as the development of the instrument continues During the next phase of the project work will be done to refine the instrument s specifications into final specifications that will be reviewed at the detailed design review The final specifications will also form the basis for the acceptance test criteria for the instrument The purpose of a requirements document is to define and communicate the Observatory s expectations for the design and implementation of a new scientific instrument for the Observatory As the procuring organization WMKO authors the requirements document in collaboration with the instrument design team A requirements document describes the new instrument in
11. MOSFIRE Requirements 1_0 doc 3 30 2006 38888 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 11 5 3 Standards Related Design Requirements Software design and coding should comply with KSD 50 and KSD 210 11 5 4 Integration Related Design Requirements None 69 MOSFIRE Requirements 1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 12 INTERFACE REQUIREMENTS 12 1 Purpose and Objectives This section is reserved for interface requirements that are not addressed by other portions of the document 12 2 Performance Requirements 12 2 1 Parametric Performance Requirements 12 2 1 1 Mechanical Interface See 8 4 4 12 2 2 Operational Performance Requirements 12 2 2 1 Handling See 8 4 4 1 12 3 Implementation Requirements 12 3 1 Feature Implementation Requirements 12 3 1 1 Optical Requirements See 7 3 1 12 3 1 2 Mechanical See 8 3 1 12 3 2 Common Practice Implementation Requirements 12 3 2 1 Glycol Cooling See 8 3 1 7 12 3 2 2 Vacuum and Cryogenics See 8 3 1 8 and 8 3 1 9 70 MOSFIRE Requirements _1_0 doc 3 30 2006 38888 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 12 3 2 3 Stray Light See 9 3 2 12 3 3 Standards Implementation Requirements None 12 3 4 Regulatory Implementation Requirements No
12. OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 8 MECHANICAL REQUIREMENTS 8 1 Purpose and Objectives The purpose of this section is to describe requirements for the performance implementation and design of the MOSFIRE mechanical systems In many cases these requirements reflect the preliminary mechanical design of the instrument The mechanical requirements address issues of design reliability and maintainability Based on experience with previous instruments the observatory is sensitive to certain aspects of performance implementation and design that have proven to be important factors in the up time of its instruments The mechanical requirements section has as a main objective the description of the expected performance features and configuration of the instrument s mechanical systems A secondary objective is to identify specific areas where experience indicates particular attention is required with respect to performance implementation or design In this revision of the document some of the mechanical requirements are very detailed and others are broader These broader requirements may need to be broken down into more detailed requirements in a further revision of this document In the case of parametric requirements many of the values given are starting points for a more detailed analysis that will take place in the next phase of the instrument s design 20 MOSFIRE Requirements_1_0
13. Optical and mechanical assemblies modules or components that must be removed for service shall be provided with locating pins or other features as required to permit repeatable removal and replacement Handling features shall be provided on all components unless they are inherently easy to handle without risk of damage Handles shall be provided preferably fixed for components with weights greater than 1 kg up to 25 kg Heavier components and subassemblies shall be provided with lifting eyes or A brackets 8 4 1 3 Electrical Electronic Assemblies and Enclosures Service access and regulatory compliance in electronic assemblies and enclosures requires attention to the dimensions of components and the space provided for terminal access wire bending and component mounting The mechanical arrangement of the electronic assemblies within enclosures should be designed using techniques that document the proposed arrangement and permit the verification of accessibility wire bend radii and electrical spacings Computer aided design techniques including solid modeling may be of value in achieving these objectives 42 MOSFIRE Requirements_1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 Where possible electrical and electronic subsystems should consist of rack mounted modules conforming to the 19 inch 482 6 mm width pattern of Electronic Industries Association E
14. Rotation Range 340 s Tracking error TBD TBD rms Deploy retract time lt 30 45 s Grating Mirror exchange turret In beam position repeatability TBD TBD mm Cycle time lt 30 45 s 6 Flexure correction Adjustment range TBD 500 urad 9 Position repeatability TBD 0 1 urad 9 Position resolution TBD 0 1 urad 9 Non linearity 0 03 TBD 10 Science detector focus Adjustment range 250 um 11 Position repeatability 1 um 11 Position resolution 5 nm 11 Non linearity 0 03 TBD 10 Tip tilt 30 TBD urad 9 External Mechanisms Guider Focus Adjustment range TBD um 12 Position repeatability TBD um Position resolution TBD nm Notes 1 The slit mask X axis corresponds to the spectrometer dispersion direction corresponds to the spectrometer spatial direction Z is the conventional optical axis direction 2 Slit mask X axis LA MOSFIRE Requirements_1_0 doc 3 30 2006 Corresponds to 0 5 at the telescope focal plane 4 Corresponds to 0 1 at the telescope focal plane Bo The slit mask Y axis S W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 Worst case reconfiguration all slits from one extreme Y position to the other Cycle time is the time required for full travel from the first position to the last position The travel time for a full slew of the telescope from horizon to zenith is 72 seconds at a speed of 0 8 s Tracking me
15. and 128C gives specific requirements for device ratings 16 Section 63 pages 128E through 133 gives specific requirements for markings These are summarized in table 67 1 pages 134A through 136B eco 51 MOSFIRE Requirements _1_0 doc 3 30 2006 ego W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 17 Additional requirements for programmable controllers are given in sections 177 through 193 pages 196B through 201 The design and construction of the wiring of MOSFIRE should conform to the requirements of the National Electric Code The applicable local electric code is the Hawaii County Code 1983 1995 Edition This code adopts the National Electric Code in its entirety and there are no additional special requirements applicable to the locations where MOSFIRE will be installed or operated The requirements given in 9 2 4 are consistent with the applicable portions of the National Electric Code 9 3 3 2 Electromagnetic Compatibility Standards exist that specify the test conditions and limits for electromagnetic emissions and electromagnetic immunity They do not give information on how to achieve compliance In the absence of such information CARA believes that a satisfactory level of electromagnetic emission and immunity compliance can be achieved by following the requirements given in sections 8 3 2 2 8 4 1 3 and 9 3 4 5 of this document For information on the perm
16. and electrical connections are made This panel should also incorporate circuit breakers and other protective devices as required to protect the wiring of the MOSFIRE instrument dewar and the rotator Additional panel s for glycol and CCR helium connections should also provided at the same location 9 3 1 5 Printed Circuit Boards All removable plug in printed circuit boards should be equipped with positive retention features Extractors should be provided for all circuit boards where high insertion and withdrawal forces are expected 9 3 2 Common Practices Implementation Requirements 9 3 2 1 Stray Light The MOSFIRE instrument should not produce stray light from LED or lamp indicators optical switches or optical shaft encoders LED or lamp indicators should not be used on the exterior of the MOSFIRE instrument Any indicators required for service should be concealed behind a cover or access door Optical switches or shaft encoders must be optically baffled or enclosed so that no stray visible or infrared light is emitted into the telescope optical path or dome environment All exterior parts of the MOSFIRE instrument should be examined for stray light emissions with a night vision device with a light gain of at least 50 000 A person known to have normal photopic and scotopic visual sensitivity should conduct the examination under dark adapted conditions 9 3 2 2 Digital Control and Status Communications Where ever possible digital com
17. disconnection all motion on the associated axis is inhibited 10 5 1 2 Rotator No part of the rotator should move when ac mains power is applied to or removed from the rotator The rotator motion control hardware should inhibit all motion during a power on reset The rotator motion control system should be designed so that loss of the encoder signal or disconnection of the motor cannot result in a wind up of the servo position command Software features should be implemented to inhibit motion when the position error measured by the servo 60 MOSFIRE Requirements 1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 controller exceeds the smallest reasonable margin that reflects all of the expected operating conditions Limit switches should be closed when not actuated N C contacts Motion control software should be designed so that a disconnected limit switch will appear to be active inhibiting further motion towards that limit Motion control software should also be designed so that movement away from an active limit switch is restricted to a reasonable distance past the limit switch actuation point after which motion is stopped and an error indicated due to the apparent failure of the limit switch to open Position encoders should include a status loop through the connections to the encoder so that in the event of loss of the encoder connection or inte
18. doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 8 2 Performance Requirements 8 2 1 Parametric Performance Requirements 8 2 1 1 General The general mechanical performance requirements for MOSFIRE are given in Table 11 Table 11 MOSFIRE Mechanical Performance Requirements Parameter Min Typ Max Units Notes Weight 1 820 kg 1 Overall dimensions 2030 x 2030 x 3607 mm 2 Operating Temperature Ambient 15 0 20 C Internal opto mechanics 120 K Internal science detector 60 65 70 K 3 Science detector temperature TBD K 4 variation Cool down time 1 Week Maximum rate of change Internal mechanisms 6 K hour 5 Internal optics 6 K hour 5 Internal science detector TBD K hour 5 Warm up time 1 Week Vacuum Hold time 12 25 Weeks Pressure 1x 10 Torr 6 Power Dissipation To ambient 50 Watts To glycol supply 1800 Watts 7 Flexure lt 0 1 0 3 pixels 8 Alignment X Y and Z axis TBD mm 9 Rotation about X and Y axis TBD 9 Total weight of instrument not including handler Height width and length of instrument not including handler See the Keck I Cassegrain envelope The FPA mosaic operating temperature is determined by the QE and dark current requirements see Temperatur
19. less than 36 volts RMS ac or 30 volts de that are capable of fault currents in excess of 2 amperes shall be marked with a warning label 9 3 4 3 Wiring Internal wiring of 120 208 240 volts ac circuits shall use UL type AWM stranded wire with an insulation thickness of at least 0 8 mm The insulation color of internal wiring and the conductors of multi conductor cable for ac power wiring shall conform to the requirements of the National Electric Code The insulation of neutral grounded conductors shall be white or gray in color Neutral conductors shall be the same size as phase conductors except in cases where two or more phases are provided and harmonic currents are expected in which case the neutral conductors shall be 125 of the size of the phase conductors The insulation of grounding conductors protective or earth ground shall be green or green with a yellow stripe Grounding conductors shall be the same size as the phase conductors Phase neutral and ground conductors shall be sized using table 43 2 of UL 508 9 3 4 4 Overcurrent Protection A fuse or circuit breaker shall internally protect all ac line connected equipment When a time delay fuse or time delay breaker is used the rating of the breaker shall not exceed 150 of the continuous full load current of the connected load Where a non time delay fuse is used the rating of the fuse shall not exceed 150 of the continuous full load current of the connected load Where an in
20. manual resetting of any hardware component and where practical without loss of data except in the case of the link from detector controller to target where data loss is inevitable and even a pause in the detector readout will typically produce artifacts in the image 63 MOSFIRE Requirements _1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 1 Loss of network or data connections a Host to target s b Host to public network c Target s to detector controller s 2 Power cycling a Host b Target s c Detector controller s 3 Hardware resets a Host b Target s c Detector controller s When recovery is not possible and for the cases where the host computer is not the system being reset or power cycled it is expected that the user interface software in the system will provide a useful diagnostic message or warning to the operator without crashing or locking up 11 3 2 2 2 Detector Controller Aborts The science detector controller should support aborts at any time during an exposure or during any readout of greater than 5 seconds duration 11 3 2 2 3 Data Disk Full The software will implement some version of certain well known mechanisms for avoiding this roll over using DISKLIST when the directory pointed to by OUTDIR is full and so on It is understood that there is no requirement to cope with failed NFS cross mounts 11 3 2 3 Execution Sp
21. mirror for imaging This will be accomplished by a high repeatability mechanism and the grating position will be fixed during spectrograph operation By using order sorting filters the spectrometer will permit full coverage of each wavelength band in a single exposure for slits located over at least 90 of the spectrometer FOV in the spectral dispersion direction 7 3 Implementation Requirements 7 3 1 Feature Implementation Requirements 7 3 1 1 Dewar Window The MOSFIRE dewar will have an entrance window approximately 370 mm in diameter It is essential that condensation or frost does not form on this window A means must be provided to ensure that this does not occur and the means provided should include some information about the temperature of the window Stresses in the dewar window such as those caused by differences in temperature or pressure must not produce deformations of the window that affect the optical performance of the instrument 7 3 1 2 Science Detector Focus Control In order to permit adjustment of final detector focus during initial testing of MOSFIRE and also to fine tune the focus for each wavelength range a mechanism should be provided for a fine focus adjustment of the MOSFIRE science detector This mechanism should adjust focus by translating the detector along the optical axis with respect to the camera and should be capable of remote operation while the dewar is evacuated and cooled It is understood that mon
22. related components 12 MOSFIRE Requirements 1_0 doc 3 30 2006 255 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 6 OVERALL REQUIREMENTS 6 1 Purpose and Objectives The purpose of the overall requirements section is to convey requirements that apply generally to the overall instrument and its accessories 6 2 Performance Requirements 6 2 1 Parametric Performance Requirements 6 2 1 1 1 Transportation and Shipping Environment When packaged as required in 6 3 2 1 MOSFIRE shall continue to meet all of the performance requirements without repair after a single shipment to the delivery location by any combination of air or surface transportation For information the expected conditions to be encountered during shipping are given in Table 4 Table 4 Transportation and Shipping Environment Parameter Min Typ Max Units Notes Altitude 0 4 572 m 1 Temperature 33 71 C 2 3 Temperature shock 54 70 C 4 Humidity 0 100 5 Gravity orientation NA 6 Vibration E 0 015 g Hz 7 8 Shock 15 g 9 Acceleration Due to transport 4 g 10 Due to seismic activity 2 g 12 Notes See MIL STD 810F Method 500 2 3 1 Maximum is for induced conditions see MIL STD 810F Method 501 Table 501 4 I Minimum is for induced conditions see MIL STD 810F Method 502 Table 502 4 II See MIL STD 810F Meth
23. should interrupt power to the affected system unless a separate over temperature detection system is provided to remove power from the affected system 8 3 1 8 Vacuum Systems Vacuum system implementations must prevent contamination of the dewar from back streaming of oil or other contaminants Oil free pumps are preferred 8 3 1 8 1 Pressure Control Vacuum systems must be equipped with at vacuum gauge facilities capable of accurately measuring the pressure in the dewar This should consist of at least one low vacuum gauge and one high vacuum gauge A back up high vacuum gauge is also desired Dewars must be equipped with pressure relief valves to protect against over pressure due to the liberation of adsorbed gasses during the warm up process 38 MOSFIRE Requirements 1_0 doc 3 30 2006 SEET W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 8 3 1 8 2 Gettering Vacuum systems must be equipped with passive gettering for the reduction of water and gasses adsorbed by the dewar walls and internal components Where molecular sieves such as Zeolite are used to perform gettering the sieves must be able to be removed and replaced without returning the instrument dewar to atmospheric pressure Regeneration of the sieves after a warm up must be accomplished in a manner that removes all adsorbed water from the sieve without contaminating the dewar or other components with water The g
24. terms of the needed scientific and technical performance The document also expresses specific requirements for implementation or lis MOSFIRE Requirements 1_0 doc 3 30 2006 S W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 design where those requirements are essential to satisfactory integration and interoperation of the instrument with the observatory systems The requirements document also references consensus standards approved by recognized standards organizations for specific guidance on technical matters related to implementation compatibility and safety The document avoids prescribing specific design or implementation solutions except for solutions that embody the Observatory s unique knowledge or experience The document establishes requirements for the new instrument that will guide the design of the instrument through the detailed design phase 2 SCOPE AND APPLICABILITY This document establishes requirements for all aspects of MOSFIRE This document also establishes requirements for changes to related sub systems and software of the Keck I telescope where required This revision of the document is the first release 3 REFERENCES 3 1 Related Documents 1 Spanoudakis P et al MOSFIRE Reconfigurable Slit Mask Technical Proposal CSEM No 20 0764 February 17 2005 Swiss Centre for Microelectronics CSEM CH 2007 Neuchatel Switzerland ae MOSFIRE Re
25. the longest power failures to date that WMKO has experienced at the summit have been less than 1 hour in duration The worst case conditions to be experienced by the instrument can be understood to occur under conditions where the observatory summit standby generator fails to start In this case the CCR compressors and CCR heads will cease to operate and within 30 minutes the dome UPS and computer room UPS will be exhausted resulting in a total instrument power failure for a further 30 minutes based on the majority of the worst case power failures to date Because of the possibility of power failures and also the necessity of disconnecting instruments from services during telescope reconfiguration instruments should be designed so that power 216 MOSFIRE Requirements_1_0 doc 3 30 2006 S W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 failures of up to 1 hour in duration affecting the electronics glycol cooling and CCR systems will not result in permanent loss of performance or damage to the instrument s detectors or other components 6 3 Implementation Requirements None 6 3 1 Common Practice Implementation Requirements None 6 3 2 Standards Implementation Requirements 6 3 2 1 Shipping Containers All shipping containers must be designed to provide adequate protection for the equipment during transport Unless otherwise specified single use containers suitable for the si
26. 0 doc 3 30 2006 SEET W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 17 GLOSSARY Table 19 defines the acronyms and specialized terms used in this document Term ANSI ASME ASTM ATA CARA CCR CENELEC CFR CIT COTS CSU CVCM dBA DCS DEIMOS EIA EMI FOV FPA FWHM IBC ICC ICD IEEE KSD MOSFIRE MTBF NEBS NEMA NIR NRT2 OSHA RT1 SDSU SMEDA SSC TBC TBD TML UCLA UCSC UPS UL Table 19 Glossary of Terms Definition American National Standards Institute American Society of Mechanical Engineers International ASTM International Air Transport Association California Association for Research in Astronomy Closed Cycle Refrigerator European Committee for Electrotechnical Standardization Code of Federal Regulations California Institute of Technology Commercial Off The Shelf Configurable Slit Unit Collected Volatile Condensable Materials Sound level in decibels measured using the A contour frequency weighting network Drive and Control System DEep Imaging Multi Object Spectrograph Electronic Industries Alliance Electro Magnetic Interference Field Of View Focal Plane Array Full Width at Half Maximum International Building Code International Code Council Interface Control Document Institute of Electrical and Electronics Engineers Keck Software Document Multi Object Spectrometer for InfraRed Exploration Mean Time Between Failures Network Equipment Building
27. 4 3 Standards Related Design Reourements cono ncon cono nccnnnos 57 9 4 4 Integration Related Design Requirements oooooocnccconoccnonoconononnnonnnonnnocono cono connnconncnns 57 10 Safety Req irementS AA 58 WOM Purpose and RE 58 WE TEE Ee 58 103 le Vater ee En CET 58 10 3 1 Parametric Performance Requirements oooooccinccinoccnonoconnnonnnonnnononoconnccnocono nono nconncns 58 10 3 2 Operational Performance Reourements nono nono nocnocnnn conan 58 10 4 Implementation Requirements aa oda 58 10 4 1 Feature Implementation Reogumrements nono ncnnno cono cano nono ncnnnonns 58 10 4 1 1 LoGal Control it i 58 TOAN Ma 59 10 4 1 3 Entrance tee 59 JOLLE Ge EE 59 10 4 2 Common Practice Implementation Requirement oooconnccnncnoccconononcnoncnncnnnonanonnninncns 59 10 4 3 Standards Implementation Requirements coooonocnnoccnonccconnconncconocnnnnono nono noconocancconncoos 60 10 4 4 Regulatory Implementation Requirement oooooocnnccnnoccconcconncconocononono nono noconocnncconncoos 60 10 5 Design REQUIEM a 60 IST Technological Design Fettes 60 10 5 1 1 MOSFIRE Instr ment Dewar sice teek 60 10 5 1 2 EE EE 60 10 5 2 Regulatory Desi on Requirements ui EEN 61 10 5 3 Standards Related Design Requirement ooococccnoncconccoonoconoconnnonn conan ccoo noconccnnncnnncnos 61 10 5 4 Integration Related Design Requirements oocoooccnocccoocnconccoonoconoconnnonn nono noconocnnnconnnoos 61 11 SHEET EE 62 ULA P rpose WEE 62 A svadiescsbansac
28. D software shall be provided in dxf files compatible with AutoCAD 2000 or a more current AutoDesk software release The preferred CAD software for 3D drawings is AutoDesk Inventor or SolidWorks The electronic drawing format for electrical electronic schematics and printed circuit board layouts and assembly drawings shall be OrCAD V9 0 or a more current release A less desirable alternative is to provide drawings for electrical electronic schematics and printed circuit board layouts and assembly drawings as AutoCAD 2000 or a more current release drawings or as dxf files compatible with AutoCAD 2000 or a more current AutoDesk software release Required Drawings All drawings must be provided as specified in the formats listed above and in the native format if translated to one of the specified formats The following drawings should be provided 1 2 As built detailed mechanical drawings for all components not commercially available Drawings shall provide sufficient detail to fabricate the components to original design intent As built detailed drawings for all optical components not commercially available Drawings shall provide sufficient detail to fabricate the components to original design intent 76 MOSFIRE Requirements _1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 3 As built assembly drawings for all assemblies not commercially av
29. E Requirements 1_0 doc 3 30 2006 238 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 Table of Contents 8 2 2 3 Flexure Correction and Focus Mechanisms ccccscesssecesseeeteceeeeeeseeeseeenseenes 34 A ee EE 34 8 3 Implementation Requirement c cccecesscessseeseceeeceeeeeeseecaeceseceeeeenseecsaeceseeseeeeeseeesaeen 35 8 3 1 Feature Implementation Requirements eer ee sade Re ees ede 35 8 3 1 1 MOSFIRE Instrument Dewar isscc cccsisagessscceuscavsntatesdecaasstecsease cgeceaecsecnteteadeceas 35 831 2 a a ados 36 Sa A o a e a s a 36 EN E Ek reel Re EE He SI o ACCESS ee 36 8 3 1 6 Eiitranice Window estate ts 37 A Glycol EE 38 Ee S E lela 38 E DE Pressure EE 38 SI LS OEA ti 39 5 1D E EE 39 8 3 2 Common Practices Implementation Reourements 39 A EE 39 8 3 2 2 Continuity of Shielding and GroundiNg oooocnocnnococonoconnnonnncnnncconoconnnonnccon coco nocnnos 40 E e EE 40 Baile A o elas a te ohh aS tel 40 83 29 o IL 41 52 0 L bricated ENT CET 41 8 3 3 Standards Implementation Requirements oooocnocononccooncconnconnnconccconocano nono ncnn coco nccnnno 41 A tele 41 83 32 A A SRE RTO TETOR RS 41 8 33 93 CryOSente Systems EE 41 8 3 4 Regulatory Implementation Requirements ooooonnnccnococioccconononnnonnnonnnoconocano nono ccoo nono 41 S4 A T Salata aoe ted ats Palen Sol E edhe 42 8 4 1 Technological Design Requirements deeg Sege Z
30. E Requirements _1_0 doc 3 30 2006 38888 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 10 SAFETY REQUIREMENTS 10 1 Purpose and Objectives Safety is the paramount concern for all activities at the observatory Specific regulations apply to health and safety as described in 6 3 3 9 3 3 and 9 3 4 The purpose of this section is to provide requirements related to specific safety concerns during the operation and handling of MOSFIRE 10 2 Scope Unless otherwise indicated all of the requirements of this section apply to all components of MOSFIRE 10 3 Performance Requirements 10 3 1 Parametric Performance Requirements None 10 3 2 Operational Performance Requirements The normal operation of MOSFIRE must not produce any safety hazard to personnel or equipment Interlocks labeling and procedures must be provided to ensure the safety of personnel and equipment during maintenance and repair As part of the processes for the detailed design review and the pre shipment review the safety of the system will be reviewed In general it is expected that conformance to the requirements of this document and the referenced regulatory standards will ensure a safe system 10 4 Implementation Requirements 10 4 1 Feature Implementation Requirements 10 4 1 1 Local Control Mechanisms internal to the MOSFIRE instrument dewar will not be accessible during normal operation However dur
31. E host software should be via keywords conforming to the requirements of the Keck Task Library KSD 8 11 4 4 Regulatory Implementation Requirements None 11 5 Design Requirements 11 5 1 Technological Design Requirements 11 5 1 1 Client Server Architecture The basic architecture of the MOSFIRE software should be based on client server architecture The server components of the system should provide keyword services compliant with the Keck Keyword Interface standards 11 5 1 2 Communications Protocols Client server communications should be via TCP IP using a WMKO approved protocol It is not required that existing message formats or services be used provided that they are capable of supporting the Keck Task Library KTL as described in KSD 8 Standard implementations of RS 232 serial communications may be used for communication with COTS hardware that does not support TCP IP network communications 67 MOSFIRE Requirements_1_0 doc 3 30 2006 85 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 11 5 1 3 Keywords Keywords should be defined in collaboration with WMKO software staff Keyword values should not be modal or dependent on other values of the keyword Keywords should conform to the formats described in KSD 8 and 28 11 5 1 4 Target Software Target software is by definition software that provides direct low level control of electronic or electromechanical system
32. Embedded Computers sc cssscccivadsvccsassnecchente cdbessaseecnande seanashaccsnpolveet 49 9 3 1 4 Instrument Connection Ee eebe 50 931 5 Printed Circuit EE 50 9 3 2 Common Practices Implementation Reourements 50 A Stray E EE 50 9 3 2 2 Digital Control and Status Communications ocooocoocccnncconncconaconanonnnonnncconocann conocio 50 9 3 3 Standards Implementation Requirements coooociocononccioncconnnonnnconccconocnnn cono ncnn cono rocio 51 DiS 3c O GET EEN 51 9 3 3 2 Electromagnetic Compatibility EE 52 9 3 4 Regulatory Implementation Requirements ooocoonoccnococooccconononnnonnnonnnoconocano nono nccnncnnns 52 OB ME Line Connections EE 52 DBD E A A A dasa ena 53 ISS EE 53 0344 Overcurrent ProvectOn casi ti eege A 33 9 3 4 5 Grounding and Shielding iia a ade 54 9 3 4 6 KEE 54 IFAT A A A de cased dotaleas ce 54 94 Design Reg irements is sei 55 9 4 1 Technological Design Requirements econo di diia dd da 55 9 4 1 1 Motion See RE 55 E E Ee EE 55 9 4 1 3 Wiring and Interconectado ee 55 9 4 1 3 1 Connector and Cable Mounting in did 55 9 4 1 3 2 Cable and Wire Ee EE 55 AA suse ois adecas scacnsteasatatescetsentooiatdenks 56 iv MOSFIRE Requirements_1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 Table of Contents DAT a E ON 56 9 4 1 3 5 Data communications connectors amp Tomate 56 9 4 2 Regulatory Design Requirements geesde eege SE 57 9
33. IA standard 310 D Cabinets Racks Panels and Associated Equipment section 1 Where rack mounted modules are used each module should be installed using rack slides Where rack mounted equipment can be accessed only from the front all rack slides must extend far enough to permit disconnection of any rear panel connections prior to removal of the rack module from the slides In systems that consist predominantly of rack mounted modules all commercial off the shelf COTS modules components and subsystems that are not available in rack mount configurations should be mounted in suitable rack module chassis or on rack mount shelves All rack module chassis and shelves should be mounted on slides Components or modules mounted on shelves must be fully enclosed as required to meet all other requirements for grounding shielding and electrical safety Components or modules weighing less than 0 5 kg may be mounted on hinged or screw mounted rack panels provided that all other requirements for grounding shielding and electrical safety are met Rails in 19 inch rack cabinets should be tapped or equipped with captive tapped inserts Clip nuts should not be used Enclosures for electrical and electronic components must provide a continuous shield to prevent the entry or emission of electromagnetic energy No openings greater than 3 mm in diameter or 3 mm in width and 15 cm in length should be permitted on the exterior of any enclosure for electri
34. System National Electric Manufacturers Association Near InfraRed Nasmyth platform Right Track position 2 right Nasmyth platform Keck II Occupational Safety and Health Administration Rail Transport position 1 Nasmyth deck Keck I San Diego State University Slit Mask Exchange Dewar Assembly Science Steering Committee To Be Completed To Be Determined Total Mass Loss University of California Los Angeles University of California Santa Cruz Uninterruptible Power Supply Underwriters Laboratories Inc 80 MOSFIRE Requirements 1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 Table 18 continued Glossary of Terms Term Definition USGS United States Geological Survey WMKO W M Keck Observatory WRT With Respect To 81 MOSFIRE Requirements _1_0 doc 3 30 2006
35. ad categories host and target MOSFIRE will use a client server architecture Low level servers implement Keck keyword communications for clients and low level interfaces to instrument hardware to allow keyword control of the instrument A global server is used to coordinate keyword activities by multiple low level servers Low level server applications can run on either the host computer or a target computer Low level servers that demand significant amounts of processor resources are often 11 MOSFIRE Requirements 1_0 doc 3 30 2006 25 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 deployed on dedicated computers these are commonly called target computers The host computer is the computer where the user interface applications are run even though this same computer may also run on or more of the server applications as well MOSFIRE target computer a computer dedicated to running one or more low level server applications that provide keyword control of MOSFIRE hardware systems A target computer has one or more hardware interfaces to subsystems of the instrument such as detectors or mechanism motion control MOSFIRE host computer the computer where the MOSFIRE global server and user interface software is run MOSFIRE Computer Rack an EIA 19 inch rack located in the Keck I computer room and housing the MOSFIRE computers data storage disk array private network interfaces and
36. afety factor of at least 5 All mechanical moving parts should be selected for a 10 year operating lifetime in the operating environment specified in Table 6 8 4 2 Regulatory Design Requirements None 8 4 3 Standards Related Design Requirements Enclosures for electrical electronic components and wiring should conform to the requirements of the Underwriters Laboratories Inc UL Standard for Safety 508 Industrial Control Equipment See 9 3 3 1 for references to the relevant requirements All electrical and electronic components should be enclosed in a manner that meets the requirements for a NEMA type 4 or better enclosure The requirements of a NEMA type 4 enclosure are given in the National Electric Manufacturers Association NEMA standards publication 250 1997 Enclosures for Electrical Equipment 1000 Volts Maximum Mechanical drawings should conform to ANSI standard Y14 5M 19994 R1999 Dimensioning and Tolerancing and ASME standard Y 14 100 2000 Engineering Drawing Practices 8 4 4 Integration Related Design Requirements 8 4 4 1 Handling MOSFIRE must be provided with all fixtures and equipment needed to disassemble the instrument dewar for service If required a crane will be provided by the observatory The footprint of service fixtures or stands must be minimized because storage and working space on the summit is at a premium 44 MOSFIRE Requirements 1_0 doc 3 30 2006 W M KECK OBSERVATORY In
37. ailable along with appropriate detail drawings and assembly tolerances and procedures 16 3 Electrical Electronic Documentation The following documentation for all electrical and electronic assemblies and modules in the instrument should be provided 1 A top level system block diagram 2 An interconnection diagram showing all interconnecting cables and connected assemblies and modules in the instrument 3 An interconnection diagram showing the external connections to the instrument 4 Pinouts and wire color codes for all internal and external connectors and cables 5 Schematics assembly drawings bills of material printed circuit board designs and printed circuit board artwork for all custom printed circuit boards in the instrument 6 Programmable logic device source code for all programmable logic devices used on custom printed circuit boards in the instrument 7 Programmable logic device source code for all programmable logic devices used in COTS components where the programmable logic device source code has been modified or customized for the instrument 8 Configuration set up and or switch jumper setting information for all COTS components 16 4 Software The instrument software is defined as all host target embedded controller software including detector controller code and data reduction software for the instrument including the code for servo controls including DSP code PMAC code or other motion control code and th
38. and detector quantum efficiency QE the expected values for instrument sensitivity will need to be reconciled with the instrument optical throughput and the actual QE of the science detectors A set of acceptance selection criteria for the detectors will be required that relate sensor QE to the required instrument sensitivity 9 2 1 3 Science Detector and Readout ASIC or Controller As a system the performance of the science detector and readout ASIC or detector controller will be as shown in Table 16 Table 16 Science Detector and Readout ASIC or Controller Performance Requirements Parameter Goal Min Max Units Notes Read Noise lt 15 20 e 1 Crosstalk 50 000 1 10 000 1 ratio 2 Readout Time lt 2 S 3 Uniformity lt 5 lt 10 TBD 4 Non linearity TBD TBD 5 Zero Point Variation lt 1 3 e 6 Notes 1 With up the ramp or Fowler sampling Conditions of measurement including number of samples and sample rate TBD 2 Between any 2 detector readout channels method of measurement to be specified 3 Readout time as required to avoid detector saturation all readout ports in use 4 Total uniformity of the detector response at any instrument wavelength and over the full useful dynamic range after flat fielding and other response corrections 5 Residual non linearity after correction of the system incident flux to digitizer count transfer function over the full range from dark to sat
39. anks 2005 edition 8 3 4 Regulatory Implementation Requirements None 4 MOSFIRE Requirements 1_0 doc 3 30 2006 255 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 SA Design Requirements 8 4 1 Technological Design Requirements 8 4 1 1 Vacuum and Cryogenic Components Materials used in the construction of components for vacuum environments should have a total mass loss TML of lt 1 Materials used in the construction of components for vacuum environments should have a collected volatile condensable materials CVCM value of lt 0 1 Values for TML and CVCM should be determined in accord with the methods of ASTM standard E595 93 2003 el Standard Test Method for Total Mass Loss and Collected Volatile Condensable Materials from Outgassing in a Vacuum Environment Materials for use in vacuum and cryogenic environments must be selected for compatibility with the vacuum and the temperatures to be encountered Although written primarily for visual wavelength instruments in particular to protect detector QE in the UV range guidance in the design and integration of instrument dewars may be obtained from the CARA document Draft Engineering Guideline for the Design and Integration of Optical Detector Cryostats Where LN is used the fill must have an overflow shield so that loss of vacuum does not result from O ring freezing 8 4 1 2 Opto Mechanical Assemblies
40. ans that the rotator is moving at the variable rate required to compensate for the image rotation produced by the telescope as it follows the sidereal motion of the sky 9 Tip tilt about the instrument Z optical axis 10 Non linearity in closed loop over the full range of travel for each axis provided 11 Translation along the camera optical Z axis 12 With respect to the nominal focus position UD Additional detail on the requirements for the CSU may be found in reference 1 8 2 1 3 Rotator The rotator is a structure in which the MOSFIRE dewar cable wrap and electronics racks are mounted and which rotates this assembly about the instrument s optical axis in order to compensate for the image rotation that occurs as the telescope follows the sidereal motion of the sky The mechanical performance requirements for the rotator are given in Table 13 Table 13 MOSFIRE Rotator Performance Requirements Parameter Min Typ Max Units Notes Rotation speed Slew 0 8 2 TBD s 1 Tracking 0 7 is 2 Rotation Range 540 560 i Tracking error TBD TBD arcseconds rms Skew TBD TBD arcseconds peak 3 Notes 1 The travel time for a full slew of the telescope from horizon to zenith is 72 seconds at a speed of 0 8 s 2 Tracking means that the rotator is moving at the variable rate required to compensate for the image rotation produced by the telescope as it follows the sidereal motio
41. at a rate sufficient to keep up with the time to readout and co add of the minimum useful number of frames taken at the shortest practical exposure time 11 3 1 4 Display Updates A display facility for science detector readouts should be provided and this display should update as quickly as possible at the completion of each exposure 11 3 2 Operational Performance Requirements 11 3 2 1 Overhead Software should permit simultaneous motion of multiple mechanisms in order to minimize the time required to complete each instrument set up between observations 11 3 2 2 Error Recovery 11 3 2 2 1 Loss of Network Connections All MOSFIRE software should gracefully recover from the interruption of TCP IP network connections fiber optic connections or USB connections any time This disconnection may occur due to physical interruption of the network connection or the power cycling or hardware reset reboot of the device at the other end of the network connection Software should implement reasonable timeouts and handle all TCP IP network errors so that recovery from a network fault is as automatic as possible Specifically the components that have not experienced power cycling or a hardware reset reboot must recover from the loss of the network connection without requiring that they be reset or rebooted Whenever possible it is expected that the system will perform in a manner that permits recovery from any of the following conditions without requiring
42. cal and electronic components This includes gaps due to access covers hinges or other enclosure components Removable covers that do not make continuous contact with the enclosure must be provided with a fastener every 15 cm or with conductive gaskets or finger stock as described in 8 3 2 2 Thermal analysis should be performed to ensure that all components operate within their temperature limits and to ensure that excess heat is not transmitted to other components or sub systems of the instrument 8 4 1 4 Mechanisms Mechanisms in MOSFIRE should be based on as few identical mechanical assemblies as possible Mechanisms should be designed in modular assemblies with a minimum of parts and with provisions for simple installation and removal during servicing and repair AR MOSFIRE Requirements_1_0 doc 3 30 2006 ego W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 8 4 1 5 Drive Couplings Shaft couplings for motors encoders and other drive components should be pinned or locked so that the shaft and coupling cannot slip Separable couplings should be used whenever possible for motors to facilitate motor replacement 8 4 1 6 Component Ratings Structural elements and fasteners whose failure could cause injury to personnel or equipment must be selected for a safety factor of 10 over ultimate strength of the material All other structures and fasteners should be designed with a s
43. cial and light industry Council of the European Communities EMC 89 336 EEC Council Directive 89 336 EEC of 3 May 1989 on the approximation of the laws of the Member States relating to electromagnetic compatibility EMC Directive County of Hawaii 1995 edition Hawaii County Code 1983 1995 edition Department of Defense MIL STD 171E Finishing of Metal and Wood Surfaces Department of Defense MIL HDBK 217F 2 Reliability Prediction of Electronic Equipment 1 This reference for information only E MOSFIRE Requirements_1_0 doc 3 30 2006 SS SST W M KECK OBSERVATORY Instrument Program Management g g Draft Requirements for MOSFIRE March 30 2006 Table 1 Referenced Standards continued Source Organization Number Title or Standardizing Body Department of Defense MIL STD 810F Test Method Standard for Environmental Engineering Considerations and Laboratory Tests EIA EIA 310 D Cabinets Racks Panels and Associated Equipment EIA ElA 649 National Consensus Standard For Configuration Management FCC Title 47 CFR Part 15 Radio Frequency Devices IEEE 802 3U revision 95 Carrier Sense Multiple Access with Collision Detection CSMA CD Access Method amp Physical Layer Specifications Mac Parameters Physical Layer Medium Attachment Units and Repeater for 100 Mb S Operation Version 5 0 IEEE 1012 2004 Standard for So
44. cio 67 1144 Regulatory Implementation Requirement ooooocnnnccinoccnonccooncconoconnnonononnnoconocnnccnnncoos 67 LS Design Requirements eege 67 11 5 1 Technological Design Requirements cooooccnococococononoooncnonccnnnoconocnno cono nonn nono nocnnnconnnoos 67 11 5 1 1 Client Server ATCHITEC EE 67 11 5 1 2 Communications Protocols rusia cin in indi Seege 67 11 5 1 3 CY WONG EE 68 RN KC Oe EE 68 11 5 1 5 Host SOM Wan e 68 11 5 1 6 science Data File een EE 68 11 5 2 Regulatory Design Requirements iS 68 11 5 3 Standards Related Design Requirements ooooocnccnnoccnonccoonoconnconnnonn conan ccoo noconocnnnconnnnos 69 11 5 4 Integration Related Design Requirements ooooocccocccooccconncoonoconocono nono nonnnoconocnnncnnnn os 69 12 Interface Requirements tee s 70 T21 Pu rp se and OBS IES daran 70 12 2 Performance equi ee a e as 70 12 2 1 Parametric Performance Reourements cnn nonnnconncnns 70 12 2 1 1 Mechanical Interac EE 70 12 2 2 Operational Performance Requirements id 70 12 2 2 1 GE 70 12 3 Implementation Requirements a aa 70 12 3 1 Feature Implementation Requirements ooonionnnonncnnnconnconanconanono nono nconon cana nonacc nac n 70 12 3 1 1 Optical RUI a ii ie aci 70 12312 ME e O iat 70 12 3 2 Common Practice Implementation Requirement oooconoccnccnoccnonononcnnncnnnnoncnancnnncnncnns 70 12 3 2 1 Glycol Cool ee 70 12322 Vacuum and CIONES EE 70 12 3 2 3 e E EE 71 vi MOSFIRE Requirements_1_0 doc 3 30 2006
45. cury Reactive salts formed are toxic Insulator Acrylic Outgases hygroscopic brittle at low temperatures Plated finish Cadmium Outgases reactive hazardous Insulator Cellulose Acetate Hygroscopic Butyrate Insulator Glass Reinforced Outgases hygroscopic Extruded Nylon Insulator Kapton Subject to hydrolytic degradation Insulator Neoprene Outgases subject to degradation by ozone and UV exposure Insulator Nylon Outgases subject to degradation by ozone and UV exposure Insulator Phenolic Hygroscopic Insulator Polychlorinated Combustion produces highly toxic gases Biphenyls Notes 1 Neutral cure RTV silicones may be acceptable provided that the cured silicone and the surrounding area are cleaned after assembly Use is or soon will be highly regulated Electrical grade phenolic is not hygroscopic Cast acrylic resin Cable ties of weather resistant Nylon 6 6 carbon black additive are acceptable LAS 202 MOSFIRE Requirements 1_0 doc 3 30 2006 255 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 6 4 2 Regulatory Design Requirements None 6 4 3 Standards Related Design Requirements None 6 4 4 Integration Related Design Requirements None Me MOSFIRE Requirements 1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 7 OPTICAL REQUIREMENTS 7 1 Purpose and Objectives The purpose of th
46. d the location of the signal source for outputs Cable shields should be electrically continuous with the connector housing and WMKO prefers that no ground pigtails or other wire connections separate from the connector housing be used In cases where the design requires different practices those design requirements should be discussed with WMKO Where multiple connector pairs of identical type are used each connector pair should be uniquely keyed to prevent accidental interchange of the connections All connectors should include pre grounding pins that make circuit common connections dc reference or ac protective ground before all other connections during connector insertion and break circuit common connections dc reference or ac protective ground after all other connections during connector removal 9 4 1 3 5 Data communications connectors amp formats Control science data and guider image data communications between the MOSFIRE instrument control electronics detector controllers and rotator and remotely located computers should be via a multi strand fiber optic bundle Fiber optic bundle connections should be via panel mounted 56 MOSFIRE Requirements 1_0 doc 3 30 2006 SET W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 connectors equivalent in performance to connectors that conform to military specification MIL C 38999 series IV Science data and guider image
47. data communications may be via proprietary protocols such as those employed with the SDSU III detector controllers or they may be via high bandwidth industry standard protocols such as Fibre Channel 1000Base SX or 100Base TX Control communications between MOSFIRE instrument and the MOSFIRE target and or host computers should employ the TCP IP protocol over a private 100Base TX network the MOSFIRE private network conforming to the Institute of Electrical and Electronics Engineers IEEE Standard 802 3U revision 95 Carrier Sense Multiple Access with Collision Detection CSMA CD Access Method amp Physical Layer Specifications Mac Parameters Physical Layer Medium Attachment Units and Repeater for 100 Mb S Operation Version 5 0 The MOSFIRE private network may have a number of devices Network devices that are physically part of the instrument should be routed to the remotely located devices in the Keck I computer room host or target computers via 100Base TX switches located on the MOSFIRE instrument and in the MOSFIRE computer rack The switches should be interconnected by a 1000Base SX fiber optic link 9 4 2 Regulatory Design Requirements See 9 2 4 9 4 3 Standards Related Design Requirements Connectors used for low voltage ac and de circuits should be types equivalent in performance to connectors that conform to military specification MIL C 38999 series IV 9 4 4 Integration Related Design Requirements None 57 MOSFIR
48. ds 39 MOSFIRE Requirements 1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 Unless otherwise specified all external enclosure and exposed structural elements should be finished in TBD epoxy paint applied in accord with the manufacturer s instructions All burrs and sharp edges shall be removed from all fabricated components unless the function of the component requires a sharp edge Mild steel surfaces that cannot be painted for functional reasons such as accurate interface surfaces shall be protected by a non tracking anti corrosion dry film lubricant 8 3 2 2 Continuity of Shielding and Grounding Dissimilar metals in contact under conditions where electrolytic corrosion may occur will be isolated by a dielectric finish or insulating spacers Not withstanding this requirement all components of enclosures that are required to provide protective grounding or EMI shielding must be electrically bonded at multiple points by threaded fasteners finger stock or a continuous conductive elastomeric gasket If grounding straps are used they must be tin plated copper braids not less than 6 mm in width Anodized aluminum parts must be free of anodizing at the points where electrical contact is required Painted metal parts must be free of paint at the points where electrical contact is required 8 3 2 3 Corrosion resistance All metal components should be finished
49. e 5 4 2 MOSFIRE Operating Modes MOSFIRE provides both imaging and spectrometer modes of operation The relative fields of view for the two operating modes are illustrated in Figure 2 The blue circle shows the total field covered by the MOSFIRE collimator The red square shows the field covered by the science detector This corresponds to the imaging FOV The green square shows the FOV in the spectrometer mode 9 MOSFIRE Requirements _1_0 doc 3 30 2006 ege W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 LEI De KEE e d D 6 8 Collimator Field of View e er D E Za tresompit Figid 46 bars x e Figure 2 MOSFIRE Field of View 10 MOSFIRE Requirements_1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 5 5 MOSFIRE Glossary In the descriptions that follow and in all other project documentation it is recommended that the following names and definitions for the components of MOSFIRE be adopted MOSFIRE the complete system consisting of the MOSFIRE Instrument handler and associated computers private network software and accessories MOSFIRE Instrument the telescope mounted portion of MOSFIRE consisting of the dewar cable wrap electronics racks and rotator Dewar a vacuum cryostat chamber containing the science optical path configurable slit mask uni
50. e Section View OF WI OSE URE i323 sis nian O ies 9 Figure 2 MOSPLRE Pield EIERE deeg A ege 10 Figure 3 Keck I Telescope Equipment Vibration Lumts 35 Table 1 Referenced Standards eii da 3 Table 2 WMRKO Standards EE 5 Table Ee EE 6 Table 4 Transportation and Shipping Environment 13 Table 5 Non Operating Environment siii duced 14 Table 6 Operating Environment gebai a teks taa 15 Table 7 Materials not Suitable for use in Equipment at the Summit of Mauna Ken 20 Table 8 MOSFIRE Typical Optical Performance Requirements cceecesseceteceeeeeeeeeeeeseeeeeaee 23 Table 9 MOSFIRE Goal Optical Performance Reoumrements 24 Table 10 MOSEIRE EE 25 Table 11 MOSFIRE Mechanical Performance Reourements 30 Table 12 MOSFIRE Instrument Mechanism Performance Requirements c cccsseeeseeeseeeeeee 32 Table 13 MOSFIRE Rotator Performance Requirements oooooocccocccococononconncconncconocnnn nono ncon nono nccnnnos 33 Table 14 MOSFIRE Electrical Performance Requirement oooooonoccccoccconnnonnnconncnonocnnn cono nonn nono nocnnno 46 Table 15 Science Detector Performance Requirements ds tiadin idea datan dad dicte SEENEN 47 Table 16 Science Detector and Readout ASIC or Controller Performance Requirements 48 Table 17 Software Latenci isa 64 Table 18 MOSFIRE Graphical eegene 65 Table es E ad E dy 80 Vili MOSFIRE Requirements_1_0 doc 3 30 2006 S W M KECK OBSERVATORY Instrument Program Management Draft Requ
51. e like The following software data files and documentation should be provided 1 Source code for all instrument software on CD DVD 2 Executables for all instrument software on CD DVD 77 MOSFIRE Requirements _1_0 doc 3 30 2006 38888 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 3 10 11 One copy of any and all software libraries required to build the instrument software executables on CD DVD A list of any and all code compilers required to build the instrument software All makefiles required for building the instrument software on CD DVD All configuration files and all data files read by the instrument software executables at start up time on CD DVD Any scripts required to run the instrument or the data reduction package on CD DVD Any aliases environment variable definitions etc required to correctly set up the environment to build or run the instrument software on CD DVD Any models developed for simulation of the instrument including optical designs and control loop simulations should be supplied The preferred software for optical design is Zemax The preferred software for simulations is Matlab or IDL Full design documentation for all control loops including block diagrams transfer function models of the system performance criteria and analyses to show how these requirements are met Models and simulations of the control loops should al
52. e variation must be controlled to ensure adequate zero point stability during exposures Rate of temperature change At during cool down or warm up Instrument dewar pressure must be maintained at the level required to maintain the internal temperature Maximum temperature rise through instrument heat exchanger is 3 C Notes 1 2 drawing for details 3 Table 6 10 4 5 6 he 8 Flexure is the amount of shift in the spectral footprint on the science detector for a change in the orientation of the instrument during a typical observation this applies to all rotator angles and all telescope elevation angles 30 MOSFIRE Requirements_1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 9 Without adjustment of the Keck I Cassegrain telescope mounted defining parts 8 2 1 2 MOSFIRE Instrument Mechanisms Mechanisms internal to the MOSFIRE dewar provide for selection of filters a deployable rotating hexagongal Lyot stop switching between imaging and spectrograph mode configuration of the spectrograph multi object slit mask flexure correction and a focus adjustment for the science detector External to the dewar a mechanism is provided for focus adjustment of the MOSFIRE guider optics The performance requirements for these mechanisms are given in Table 12 Where three values are given for a parameter they correspond to x y and z directions as descr
53. ed as required by seismic standards for a zone 4 earthquake zone see 8 3 3 1 below The handler must incorporate seismic restraint provisions for use when the handler is parked at the storage position The handler should be equipped with a removable tractor drive assembly compatible with the existing LRIS tractor drive assembly and drive method 8 3 1 3 Rotator A rotator required to rotate the MOSFIRE instrument about the telescope s optical axis in order to compensate for the image rotation that occurs as the telescope follows the sidereal motion of the sky The rotator should incorporate a mechanical lockout feature that locks the MOSFIRE instrument in place so that it cannot rotate This feature will ensure that the instrument will not move due to an imbalance caused by removal of a component for service Mechanical lockout features should activate an electrical lockout consisting of one or more non defeatable switches that disable the drive system when the mechanical lockout is active and provide a remote indication that the mechanical lockout is active The electrical lockout will protect the rotator drive system components as well as prevent unintended drive activation The rotator must incorporate a defining point system that is compatible with the defining point system in place at the Keck I Cassegrain position for the LRIS instrument In particular the components of the defining system on the rotator must incorporate sufficient ad
54. edeeeg eege dad 42 8 4 1 1 Vacuum and Cryogenic Components cocooccnoccnoccconncconoconncnnnnconccconocconocnnn con cconncinns 42 8 4 1 2 Opto Mechanical Assemblies ua egene 42 8 4 1 3 Electrical Electronic Assemblies and Enclosures oooonoccnnncnnococonccconoconncnancconccnnno 42 84 14 Mechanisms EE 43 SAMS Diye Ee 44 8 4 1 6 TEE 44 8 4 2 Regulatory Design Requiem ele el 44 8 4 3 Standards Related Design Reourements nono ncnonccnnnos 44 8 4 4 Integration Related Design Requirements oooooocnocccnoccnonoconononnnonnnonnnoconocono cono nconncnns 44 8 441 Handling ege EE E 44 9 Electronic Electrical REQUIEM EE 46 iii MOSFIRE Requirements 1_0 doc 3 30 2006 e e SEET W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 Table of Contents 9 1 P rpose and Ree 46 92 Performance Requirements EE 46 9 2 1 Parametric Performance Requirements lt s ssecssaiessssessccssscosaccesatessssesscsesahenacdenss 46 E E ME TR 46 9 2 1 2 Science Detector uni iia 47 9 2 1 3 Science Detector and Readout ASIC or Controller oooooconccnnccnnococoncconnninnconncnno 48 A Re 48 DPMS a NEE 48 9 2 1 6 Temperature and Huida tadas 49 9 2 1 7 Cable and EE 49 9 2 2 Operational Performance Reoumements nono noconocanoconnnconncnno 49 9 3 Implementation Requirements Ree ee 49 9 3 1 Feature Implementation Reourements 49 OBA Emergency Stop PU EE 49 93 27 A da 49 9 3 1 3 Target and
55. eed and Command Latency The response time requirements for the MOSFIRE software are given in Table 17 Table 17 Software Latencies Software Function Goal Min Max Units Notes Status requests 0 1 0 2 s Motion commands 0 1 0 2 s Observatory E stop 0 01 0 05 s Detector controller commands 0 1 0 2 s 1 Detector controller aborts gt 1 5 s 2 Application software startup gt 10 30 s 3 and initialization 64 MOSFIRE Requirements _1_0 doc 3 30 2006 SEET W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 Notes 1 Not including the exposure or readout times Not including the time elapsed prior to the abort command for the exposure in progress or the readout in progress 3 Not including the actual time required to perform the operating system re boot and associated initializations 11 4 Implementation Requirements 11 4 1 Feature Implementation Requirements 11 4 1 1 User interfaces Graphical user interfaces GUIs should be provided for all observing control functions These interfaces must be implemented in a manner consistent with other WMKO instruments and in conformance with KSD 210 User interfaces based on the OSIRIS heritage are preferred If the MOSFIRE user interfaces are written in Java then they should communicate with the MOSFIRE servers using the OSIRIS KTL to Java interface KJava Table 18 lists the u
56. ego W M KECK OBSERVATORY Draft Requirements for MOSFIRE MULTI OBJECT SPECTROMETER FOR INFRA RED EXPLORATION Version 1 0 March 30 2006 MOSFIRE Requirements_1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 Table of Contents I a A A a cs ale 1 Zi 7 A O sie eatin 2 gt SSE E H 3 1 R lat d A a ei 2 a Referenced Standards iii 3 3 2 1 Industry Consensus e EE 3 3 2 2 WMKO Sta dardS EE 5 3 3 Referenced A ee 6 4 REVISION History sintio 6 KOR BACK Orin A A A A as 7 5 1 EAN a OS ee 7 5 2 Motivation for the Development of MOSFIRE ooconoccnnccccocnconncconoconnnonn nono nocono conc cono cconncinos 7 5 3 DC A a 7 5 4 SE TE EE 7 5 4 1 MOSFIRE Instrument Layout and Constramts nono ncon cnc nocannnonnno 8 5 4 2 MOSFIRE Operating Modest ci 9 5 5 MOSFIRE GLOSS ary eege 11 A EE 13 6 1 PURPOSE E eu 13 6 2 Performance Requiem dance awe ea ee Ree 13 6 2 1 Parametric Performance Requirements ooconnoccnocococnnonnconnnononoconocnnnncnnnconnccon coco nccnnss 13 6 2 1 1 1 Transportation and Shipping Environment 13 6 2 1 1 2 Non Operating Environment deen 14 6 2 1 1 3 AA EEN 15 6 2 2 Operational Performance Reoumements nono nonnocano cono nconncnns 15 6 2 2 1 Ait Borne Contaminants is 15 6 2 2 2 Me 15 6 2 2 3 Telescope RECON de Gate 16 6 224 Power baren geen eege enee ee eer ee eg 16 6 3 Implementation Requirements ii ab coda 17 6 3 1 Common Practice Imple
57. em for installation in the Cassegrain focal station 6 Electronics consisting of a An IR detector system b Dewar temperature and pressure monitoring c Motion control systems for all mechanisms d An external optical guider system 7 Instrument control software 8 A data reduction pipeline 9 Interfaces to the telescope and observatory systems 5 4 1 MOSFIRE Instrument Layout and Constraints A sectioned side view of the MOSFIRE instrument in the preliminary design stage is shown in Figure 1 MOSFIRE is designed for mounting at the Cassegrain position of the Keck I telescope This focal station imposes strict envelope requirements as well as requirements to cope with varying gravity vectors during operation The Cassegrain position also requires that the instrument meet specific weight and balance requirements and provide definition points compatible with the existing defining points used for the LRIS instrument on Keck I MOSFIRE Requirements_1_0 doc 3 30 2006 Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 Dust Cover Mechanism Slit Outer Mask Window nit Inner q Cold Windo a Se Handler Keck E Cassegrain Field Lens Internal G 10 Envelope Vacuum pump Support Rotator Figure 1 Section view of MOSFIRE The thin black outline indicates the Keck I Cassegrain envelope limits Note that the handler shown in this figure is not attached to the instrument when it is mounted in the telescop
58. erformance Requirements Parameter Min Typ Max Units Notes FOV Imaging 6 14 x 6 14 arcminutes Multi object spectroscopy 6 12 x 3 00 arcminutes Wavelength coverage Y band 0 95 1 05 um 1 J band 1 1 1 4 um 1 H band 1 475 1 825 um 1 K band 2 2 45 um 1 2 Imaging plate scale 0 18 arcseconds pixel Spectral resolution Multi object spectroscopy 0 7 slit width 3 270 A A 0 36 slit width 4 800 A A Input focal ratio f 15 n a Science detector n a 2048 x 2048 n a X by Y pixels Guider FOV 2 8 x 2 8 arcminutes Sensitivity 18 V mag 2 Notes 1 Imaging and spectroscopy 2 For a SNR of 10 assuming a CCD47 20BT CCD RG780 filter and a total throughput telescope guider optics of 35 3 The long wavelength value quoted here is beyond the end of the K band but is stated to reflect the values used in the optical design analysis The exact cutoff will be determined by the filter choices 13 MOSFIRE Requirements 1_0 doc 3 30 2006 S W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 7 2 1 2 Goal Parameters The optical performance requirements shown in Table 9 are desired as design goals Table 9 MOSFIRE Goal Optical Performance Requirements
59. es 6 1 page 22 and 6 2 page 23 Specific details for doors and covers are given in section 6 4 pages 24 through 27 3 Specific requirements for the design of ventilation openings are given in section 6 9 pages 31 through 33 4 Specific details for controlling the accessibility of live parts are given in section 6 17 pages 36 through 37 and figures on pages 38 and 39 5 Requirements for insulating material that directly supports live parts are given in section 15 pages 42B through 43 This includes printed circuit boards 6 Specific requirements for the protection of control circuits are given in section 18 2 pages 47 through 48B Specific requirements for internal wiring are given in section 21 pages 50 through 56A Section 34 page 68 gives specific requirements for the separation of circuits Section 35 page 68A gives specific requirements for optical isolators 0 Specific details for required electrical spacings are given in section 36 pages 68A through 73 11 Specific details for grounding are given in section 40 pages 79 through 82 12 Table 43 1 pages 84C through 84E and explanations on pages 84E and 84F indicates the maximum permissible temperature rises for specific materials and components 13 Table 43 2 page 86 indicates the ampacity of various insulated conductors 14 Section 49 pages 99 through 100A gives the requirements for dielectric voltage withstand testing 15 Section 62 pages 128B
60. essautecesdaustctvoacsacesbanenaacyanoieus ans ince a adecaganatee seas sucepdan bas ene ieeahaaeliee 62 11 3 Performance euer 62 11 3 1 Parametric Performance Reorementg 2 5 ccdccevecsrsneedetwesceoneesdbeconanecdadeecceunseses 62 11 3 1 1 A O lant daeagieeene 62 113 12 Fiber Optic Data Lis A ta 63 11 3 1 3 Data Transfer EE 63 LILA Display Elend eh eer 63 11 3 2 Operational Performance Requirements siria dc 63 11 3 2 1 Overhead DE 63 11 3 2 2 eg EE 63 11 3 2 2 1 Loss of Network Conecta aio E 63 y MOSFIRE Requirements 1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 Table of Contents 113 2 2 24 Etterbeek EE 64 RE Z225 Data Disk FUlar anaa a a en E A E E E ANTE 64 11 3 2 3 Execution Speed and Command Latency oooonoccccococonoconcconnnonnnononocnnn conc ccnnncinns 64 114 Implementation Requirements 1 dd 65 11 4 1 Feature Implementation Reogumrements nono nocnocono nono ccnnncns 65 11 4 1 1 ON 65 1141 22 tree 66 11 4 1 3 CSCO ONE AMON EE 66 114 4 Data Rediction Pipeline rem eed Debat erger Seege 66 11 4 1 5 MOSFIRE Instrument Dewar i seciectacisssecisaedcceustevcntadactscaaenteceeasdedectaceasdeteecdoctes 66 11 4 1 6 SOU Wale EEN 66 11 4 2 Common Practice Implementation Requirement eecesececeeeeceeeceseceseeseeeeeees 67 114 3 Standards Implementation Requirement cooocococinncnonccononcoonoconoconn cono nono noconocnnn cono
61. etric distortion over the entire guider FOV Instrument throughput QE of the science detector is not included Guider optical system throughput QE of the guider detector is not included iere OV U 24 MOSFIRE Requirements _1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 10 This is the contribution of the instrument background to the total dark counts the goal value is 10 of the goal for science detector dark current 11 Intensity of the ghost image compared to the parent image at all wavelengths from 0 95 to 2 45 um 7 2 2 Operational Performance Requirements 7 2 2 1 Observing modes MOSFIRE will provide two observing modes e Direct imaging e Multi object spectroscopy with a multiplex of up to 45 objects Slits deployable on a nominal 8 pitch Minimum slit length 7 3 Adjacent slit bars can be combined to form longer slits in increments of 8 The minimum slit width is 0 5 adjustable in increments of 0 1 7 2 2 2 Filters MOSFIRE will provide 10 filters in two six position filter wheels 5 filters open in each wheel Although final specifications for the MOSFIRE filter set are not finalized some likely placeholder specifications are shown in Table 10 Table 10 MOSFIRE Filters Filter Filter Specifications Description CWL BW Min Max Ave wheel position
62. ftware Verification and Validation International Code IBC 2006 2006 International Building Code Council ICC ISO IEC ISO IEC 12207 1995 Information Technology Software life cycle processes National Electric 250 1997 Enclosures for Electrical Equipment Manufacturers 1000 Volts Maximum Association National Fire Protection NFPA 55 2005 edition Standard for the Storage Use and Association NFPA Handling of Compressed Gases and Cryogenic Fluids in Portable and Stationary Containers Cylinders and Tanks NFPA NFPA 70 2005 edition National Electric Code NFPA NFPA 99C 2005 edition Standard on Gas and Vacuum Systems Naval Surface Warfare Center NSWC 98 LE1 Handbook of Reliability Prediction Procedures for Mechanical Equipment Laboratories Inc OSHA Title 29 CFR Part 1910 Occupational Safety And Health Standards Telcordia GR 63 CORE NEBS Requirements Underwriters Standard for Safety 508 Industrial Control Equipment 1 This reference for information only 4 MOSFIRE Requirements _1_0 doc 3 30 2006 ego W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 3 2 2 WMKO Standards WMKO software standards are also referenced in this document References to these standards are included because compliance with some part of each standard may be required Table 2 WMKO Standards Source
63. grounded to protect those components from unintended operation due to external electromagnetic emissions of the levels established in the standards referenced in 9 3 3 2 9 3 4 6 Terminations Crimp terminals and compression screw terminals shall not be used to terminate more than the number of conductors specifically approved for the terminal All crimp terminals and screw terminals used for ac line connected wiring must be UL recognized components All crimp terminations shall be performed using the manufacturer s tooling in accord with the manufacturer s instructions 9 3 4 7 Altitude Derating The voltage ratings of relays switches and insulated cables must be reduced to 80 of their rated value due to the altitude at the summit of Mauna Kea Electrical spacings must also be increased by a factor of 1 25 to compensate for the increased altitude The normal dielectric withstand test specification for UL approved or listed components for use in ac line connected equipment operating from 120 240 volts ac is 2500 volts AC 60 Hz for one minute Voltage ratings for all components should be checked for safety margin with respect to this rating using the following equation 54 MOSFIRE Requirements 1_0 doc 3 30 2006 255 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 _ 2 V 1000 AF VI where VI is the voltage isolation required for the altitude AF is the altitude factor of
64. he Keck I dome UPS an industrial uninterruptible power supply UPS shared with the other instruments on Keck I This UPS has a hold up time of 30 minutes A separate UPS is provided for the Keck I computer room and this UPS provides backup power for the instrument computers The Keck I computer room UPS also has a hold up time of 30 minutes Under normal conditions the observatory summit standby generator will start within 1 minute of the power failure and begin supplying primary power to the Keck I dome UPS Keck I computer room UPS and the other UPS units at the summit During a power failure the glycol cooling system pumps and chiller will be inoperative so instrument electronics dependent on glycol cooling require either flow switches or temperature sensors to ensure that the electronics are shut down even though the electronics will be powered from the Keck I dome UPS and the observatory summit standby generator The CCR compressors and CCR heads are powered from the generator but they require glycol cooling for continuous operation During a power failure the CCR compressors will experience momentary power interruptions of less than 1 minute duration and will then continue to operate on the generator until their thermal protection systems shut them down Under normal conditions the observatory summit standby generator has sufficient fuel for 18 hours of continuous operation at full load With only two exceptions in over 10 years of operation
65. ibed in the notes All of the requirements in Table 12 apply at the operating temperatures given in Table 6 for mechanisms external to the dewar and Table 11 for mechanisms internal to the dewar The performance of the MOSFIRE Instrument mechanisms is important to obtaining maximum on sky productivity from the instrument Mechanism cycle times should be consistent and as short as possible in order to reduce the set up time for each observation The mechanisms must operate reliably at all rotator positions and at all telescope elevation angles 3j MOSFIRE Requirements 1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 Table 12 MOSFIRE Instrument Mechanism Performance Requirements Parameter Min Typ Max Units Notes X y z x y z X y z Dewar Internal Mechanisms Configurable Slit Unit Slit position accuracy 200 36 250 um 1 Slit position repeatability 200 36 250 um 1 Slit width error 36 um 2 Slit width 360 um 3 Slit width resolution 72 um 4 Reconfiguration Time lt 5 6 min 5 Filter wheels In beam position repeatability TBD TBD mm Cycle time lt 30 45 s 6 Rotating Lyot stop Rotation speed Slew 0 8 2 TBD is 7 Tracking 0 7 is 8
66. ific Hawaii 2RG HgCdTe device with a nominal format of 2048 x 2048 imaging pixels The requirements for the performance of the science detector are given in Table 15 All measurements are at a temperature of 77 K unless noted otherwise Table 15 Science Detector Performance Requirements Parameter Goal Min Max Units Notes Active Area 2048 x 2048 2040 x 2040 X Y pixels Pixel Pitch 18 18 um Fill Factor gt 98 gt 95 Outputs 32 Dark Current lt 0 01 lt 0 1 e pixel s 1 Dark Current Shift lt 0 001 lt 0 005 e pixel s 2 Dark Current Decay Time lt 1 S 3 Multiplexer Glow lt 0 01 lt 0 05 e pixel read 4 Charge Storage Capacity 100 000 60 000 e pixel Memory Charge e pixel 5 Quantum Efficiency Y band 80 60 J band 80 60 H band 80 65 K band 80 65 Cut on Wavelength 0 9 um 6 Cut off Wavelength 2 50 2 53 um 7 Operability gt 99 5 98 8 Readout time lt 2 TBD s 9 Notes Including any continuous multiplexer glow 2 Change in the measured dark current after readout for pixels exposed to 90 or more of the maximum detector charge storage capacity 3 Time required for dark current to return to the long term soak value after any part of the detector active area is exposed to flux below the saturation level 4 Maximum value must not cause read noise maximum to be exceeded when using mul
67. ific requirements are given in areas where repeated problems have affected the availability of instruments Among these are issues of network reliability reliability of fiber optic data connections to detector controllers and problems with handling errors in a manner that minimizes the loss of observing time by providing useful error messages and avoids total system resets or power cycling to restore proper operation 11 2 Scope Unless otherwise indicated all of the requirements of this section apply to all software components of MOSFIRE 11 3 Performance Requirements 11 3 1 Parametric Performance Requirements 11 3 1 1 Reliability All software components of MOSFIRE should be tested under simulated operating conditions and should achieve at least 150 hours of continuous operation without a fault The reliability of the following software components should be tested and confirmed a Host OS b Target computer s OS c Host application d Target application s e Detector controller code 62 MOSFIRE Requirements _1_0 doc 3 30 2006 85 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 11 3 1 2 Fiber Optic Data Links Fiber optic data links should tolerate up to 10 db of attenuation due to interconnection losses without impairment of performance or reliability 11 3 1 3 Data Transfer Performance Data transfer from the MOSFIRE host computer to the disk storage should be
68. ign A key consideration is the safety of personnel and equipment and proper electrical design and implementation practices in compliance with recognized standards are an essential aspect of electrical safety A second consideration is the electromagnetic compatibility of the instrument with the observatory systems and specific implementation and design requirements are given to aid in achieving the required electromagnetic emissions and susceptibility performance 9 2 Performance Requirements 9 2 1 Parametric Performance Requirements 9 2 1 1 Electrical Power The preliminary electrical power requirements for MOSFIRE are given in Table 14 Table 14 MOSFIRE Electrical Performance Requirements Parameter Min Typ Max Units Notes Instrument Power Voltage 108 120 132 Volts AC 1 Current 20 Amperes Frequency 57 60 63 Hz Tractor Power Voltage 187 208 229 Volts AC 2 Current 20 Amperes Frequency 57 60 63 Hz Wire and cable ratings 30 100 C Notes 1 Power for all instrument electronics and drive motors including the rotator electronics and drive but excluding the tractor drive for moving the handler 2 Power for the tractor drive 46 MOSFIRE Requirements 1_0 doc 3 30 2006 SS SST W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 9 2 1 2 Science Detector The science detector will be a Rockwell Scient
69. ing servicing a means must be provided to ensure that all MOSFIRE mechanisms are under local control and remote control is locked out The rotator should be equipped with a local control switch to defeat remote control during service and maintenance operations The rotator should be equipped with a motion stop switch to prevent motion of the mechanism during emergencies service and maintenance The rotator should also 58 MOSFIRE Requirements 1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 be connected to the Keck I telescope emergency stop circuit to disable rotator motion when the emergency stop is activated 10 4 1 2 Mechanical All areas of the rotator where exposed moving parts can create a pinch hazard should be clearly marked with a hazard warning label or equipped with shrouds to prevent accidental contact The rotator should incorporate a mechanical lockout feature that locks the MOSFIRE instrument in place so that it cannot rotate This feature will ensure that the instrument will not move due to an imbalance caused by removal of a component for service Mechanical lockout features should activate an electrical lockout consisting of one or more non defeatable switches that disable the drive system when the mechanical lockout is active and provide a remote indication that the mechanical lockout is active The electrical lockout will protect the rotator dr
70. ing the science detector and ASIC inside the instrument dewar must be accessible for service without returning the instrument to atmospheric pressure 8 3 1 6 Entrance Window A remotely operated cover should be provided for the front of the instrument dewar that completely protects the dewar entrance window and guider optics from dust and from damage due to glancing or direct horizontal blows or impacts while in the storage position or moving from storage to the telescope A typical scenario for the calculation of forces involved is as follows A person moving at a normal walking pace 1 3 m s carrying a 3 meter length of schedule 80 1 1 4 pipe 14 kg walks directly towards the front of MOSFIRE The pipe strikes the cover The person carrying the pipe does not loose his grip on the pipe and for the purposes of this analysis the Av in the collision is 1 3 m s The cover should be able to resist the resulting force without damage to the instrument window The cover should be interlocked to the instrument and telescope interlocks so that the window cover is prevented from opening except when the instrument is defined at the Keck I Cassegrain operating position Special provisions for local operation of the entrance window cover while the instrument is in other positions may be required but remote operation of the entrance window cover should only be possible when the instrument is defined at the Keck I Cassegrain position ZT MOSFIRE Re
71. irements for MOSFIRE March 30 2006 1 INTRODUCTION This document describes the requirements for MOSFIRE a cryogenic multi object near infrared spectrometer for the Keck I telescope at the W M Keck Observatory WMKO MOSFIRE will provide near IR 0 9 2 5 um multi object spectroscopy over a 6 1 x 3 field of view with a resolving power of R 3 270 for a 0 7 slit width R 4800 for a 0 5 slit or imaging over a field of view FOV of 6 14 with 0 18 per pixel sampling Using a single state of the art Rockwell Hawaii 2RG HgCdTe detector with 2K x 2K pixels MOSFIRE will capture most or all of an atmospheric window in a single exposure for any slit placed within a 6 1 x 3 field and the instrument will employ a single fixed diffraction grating used in multiple orders 3 4 5 and 6 for dispersion in the K H J and Y a k a Z bands respectively A special feature of MOSFIRE is that its multiplex advantage of up to 45 slits is achieved using a cryogenic configurable slit unit CSU being developed in collaboration with the Swiss Centre for Microelectronics The CSU is reconfigurable under remote control in less than 5 minutes without any thermal cycling of the instrument MOSFIRE is being developed for WMKO by the University of California Los Angeles UCLA the California Institute of Technology CIT and the University of California Santa Cruz UCSC The MOSFIRE Co Principal Investigators are Ian McLean of UCLA and
72. iring 55 MOSFIRE Requirements 1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 Service loops should be provided when necessary but all cables should be routed neatly and secured at regular intervals with wire ties or lacing cord 9 4 1 3 3 Labeling of Interconnections All external interconnecting cables and any corresponding panel mounted connectors must be uniquely identified and labeled The labeling and identification should be in a clearly visible and non removable form This identification scheme must be identical to that used in the system documentation Identification of cables by color coding is not a substitute for clear labeling 9 4 1 3 4 Interconnections External interconnections of low voltage ac and de circuits should be shielded whenever there is a reasonable possibility that those interconnections will be subject to electromagnetic interference or unwanted coupling Cable shields should be terminated to the connector housings and not via a wire to a connector pin Where it may be necessary to isolate shields due to common mode noise problems cable shield terminations should be made at one end of the cable only with the end selected for termination being the one that is closest to the point in the system where the zero signal reference potential is grounded This is normally the location of the terminating load resistance for signal inputs an
73. is section is to describe requirements for the performance implementation and design of the MOSFIRE optical system In many cases these requirements are derived directly from the preliminary optical design of the instrument Preliminary optical parametric performance requirements for MOSFIRE are grouped into two categories typical parameters and goal parameters Requirements for typical parameters are given where enough is known to establish a range of values for the listed parameters Requirements for goal parameters are given where scientific or technical uncertainty prevents a full definition of the achievable range of values for the listed parameters During the detailed design phase for MOSFIRE these requirements which at least in part drive the specifications for the instrument will be refined into a set of specifications In this process goal parameters will be refined through research and development activity into typical values The minimum and maximum values for parameters listed in the requirements for goal parameters indicate the acceptable bounds on worst case performance 22 MOSFIRE Requirements _1_0 doc 3 30 2006 S W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 1 2 Performance Requirements 7 2 1 Parametric Performance Requirements 7 2 1 1 Typical Parameters MOSFIRE should provide the optical performance described in Table 8 Table 8 MOSFIRE Typical Optical P
74. itoring the temperature of the window must be done in a manner that does not occlude any portion of the science or guider FOV 26 MOSFIRE Requirements 1_0 doc 3 30 2006 255 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 7 3 1 3 Guider The MOSFIRE guider optics will be provided as part of the MOSFIRE optical system and are located on the exterior of the dewar next to the entrance window providing an offset guider field adjacent to the science FOV The MOSFIRE guider optics will include a provision for guider focus adjustment The MOSFIRE guider camera will be supplied by the observatory and will have an E2V CCD47 20BT detector The camera will be provided with the required interface for the MOSFIRE guider optics The camera will also provide motion control electronics to operate the MOSFIRE guider optics focus mechanism The Observatory guider system software will control the MOSFIRE guider camera 7 3 2 Common Practice Implementation Requirements None 7 3 3 Standards Implementation Requirements None 7 3 4 Regulatory Implementation Requirements None 7 4 Design Requirements 7 4 1 Technological Design Requirements 7 4 1 1 Optical Component Mountings All optical components should be mounted so that alignment is maintained during cool down and warm up cycles Mountings must ensure that excessive stress is not placed on the optical components due to thermal differential
75. itted level of emissions and the required level of immunity the following standards may be consulted 1 The conducted and radiated emissions limits for unintentional radiators are specified in Title 47 CFR Part 15 sections 15 107 and 15 109 for class B devices 2 Electromagnetic immunity requirements are given in the Council of the European Communities Directive EMC 89 336 EEC and the reference standard of the European Committee for Electrotechnical Standardization CENELEC EN 50082 1 1997 Electromagnetic compatibility Generic immunity standard Part 1 Residential commercial and light industry published in the Official Journal of the European Community on March 1 1998 9 3 4 Regulatory Implementation Requirements 9 3 4 1 AC Line Connections All ac line connected parts shall be fully enclosed so as to prevent accidental contact with live parts All ac line connections shall utilize UL listed connectors and cables All power input connectors shall have an adjacent label indicating the voltage frequency and current rating for which the equipment is designed 52 MOSFIRE Requirements _1_0 doc 3 30 2006 ego W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 9 3 4 2 Covers Removable covers that permit access to circuits with voltages in excess of 36 volts RMS ac or 30 volts de shall be marked with a warning label Removable covers that permit access to circuits of
76. ive system components as well as prevent unintended drive activation 10 4 1 3 Entrance Window Cover The instrument dewar entrance window should be equipped with a remotely operated cover that should be interlocked to the instrument and telescope interlocks so that the window cover is prevented from opening except when the instrument is defined at the Keck I Cassegrain operating position Special provisions for local operation of the entrance window cover while the instrument is in other positions may be required but remote operation of the entrance window cover should only be possible when the instrument is defined at the Keck I Cassegrain position The window cover must incorporate safety sensor switches to prevent injury to personnel as it closes The window cover must be designed to protect the window from damage as described in 8 3 1 6 10 4 1 4 Electrical Removable panels that expose voltages in excess of 230 Vac or 500 volts de should be equipped with defeatable interlock switches that remove all voltages in excess of 36 volts ac or de from all exposed connections and terminals See 9 3 3 1 for additional electrical safety requirements 10 4 2 Common Practice Implementation Requirements None 59 MOSFIRE Requirements 1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 10 4 3 Standards Implementation Requirements None 10 4 4 Regulatory Implemen
77. justment range to allow alignment of MOSFIRE with the Cassegrain focal plane without requiring adjustment of the defining system components mounted at the Keck I Cassegrain position 8 3 1 4 Tractor Drive A removable tractor drive assembly compatible with the existing LRIS tractor drive assembly and drive method should be provided to move the handler on the Keck I Cassegrain platform and Nasmyth deck rail system 8 3 1 5 Access and Covers Components requiring routine service or maintenance should be accessible by removing a single cover secured by no more than 8 fasteners Covers that may be removed in a location where Be MOSFIRE Requirements_1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 fasteners could fall into the interior of the enclosure or the instrument may be equipped with captive fasteners Covers that may be removed in a location where fasteners could fall into the interior of the enclosure should be equipped with captive fasteners Captive fasteners shall be of the threaded type and shall not captivated by swaged sleeve fittings Quarter turn fasteners engaging spring hooks are specifically discouraged for reasons of fit and reliability Whenever possible service access provisions should be provided that do not require disassembly of the entire instrument to access motors or switches for replacement All electronics systems of MOSFIRE not includ
78. listing and labeling program Note that the preceding text is reproduced verbatim from the referenced CFR and any grammatical errors or typographical errors are part of that text 19 MOSFIRE Requirements 1_0 doc 3 30 2006 255 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 6 4 Design Requirements 6 4 1 Technological Design Requirements 6 4 1 1 Materials Suitability and Safety Certain environmental conditions low temperature and pressure at the summit of Mauna Kea make certain materials unsuitable for use in instrument construction Materials used in the construction lubrication or packaging of instruments must not produce hazardous by products such as gases or other contaminants under the conditions of operation and use at the summit of Mauna Kea No mercury may be used in any component of MOSFIRE Table 7 lists specific materials that should not be used Note that this table applies to portions of the instrument normally open to the atmosphere See 8 4 1 1 for materials considerations for vacuum cryostats and similar environments Table 7 Materials not Suitable for use in Equipment at the Summit of Mauna Kea Material Type Common Name Reason s for Unsuitability Adhesive insulator RTV silicone rubber Outgases during curing Adhesive Cyanoacrylates Outgases during curing subject to hydrolytic degradation Conductor Mer
79. ll drawings shall include parts and materials lists in accordance with ANSI Y14 34 2003 Parts Lists Data Lists And Index Lists Associated Lists All items shall be identified with an item number or other label with reference to the drawing number if one exists for each part or component with all information required for procurement 6 Assembly drawings shall include all relevant views required to clearly define the assembly including isometric and exploded views 75 MOSFIRE Requirements_1_0 doc 3 30 2006 38888 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 10 11 12 13 16 2 2 All detail drawings shall include all views geometry dimensions and feature controls required to duplicate the part in accordance with ANSI Y14 5M 1994 R1999 Dimensioning and Tolerancing Multi and sectional view drawings shall be developed in accordance with ANSI Y14 3M 1994 Multi and Sectional View Drawings Fluid power system schematics shall be drawn in accordance with ASME Y32 10 1967 R1994 Graphic Symbols for Fluid Power Diagrams Dimensions and tolerances shall be indicated in accordance with ANSI 14 5M 1994 R1999 Surface finishes shall be described in accordance with ANSI 14 5M 1994 R1999 The electronic drawing format shall be at least AutoCAD 2000 or a more current release Drawings created with other computer aided drafting CA
80. mal to the earth s surface 20 Hz to 1000 Hz 6db oct drop off to 2000 Hz 0 015 second half sine all axes 2 g vertical 1 g fore aft 0 5 g lateral 14 Typical value is the average annual temperature W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 6 2 1 1 3 Operating Environment The operating environment is the ensemble of all conditions experienced under normal telescope operation when the MOSFIRE Instrument is installed at the Keck I telescope Cassegrain position All performance requirements shall be met while MOSFIRE Instrument is subjected to the operating environment conditions given in Table 6 Table 6 Operating Environment Parameter Min Typ Max Units Notes Altitude 0 4300 m Temperature Range 10 0 20 C 1 Rate of change 0 8 0 8 C h Humidity 0 90 2 Gravity orientation 1 g 3 Vibration 1x107 g Hz 4 Acceleration 1 g 5 Notes 1 Typical value is the average annual temperature 2 Relative non condensing 3 Normal to the earth s surface 4 20 Hz to 1000 Hz 6db oct drop off to 2000 Hz 5 All axes due to telescope drive system fault conditions 6 2 2 Operational Performance Requirements 6 2 2 1 Air Borne Contaminants The weather conditions at the summit of Mauna Kea include frequent high winds resulting in some air borne contaminants particularly dust and insects Instr
81. mentation Requirement ooooccnicccnococonncconncconocanononnninnncnnno 17 6 3 2 Standards Implementation Requirements oooocnoccnocccononconcnonnnconccconocono nono ncon coco nocnnno 17 6 3 2 Ek TER 17 6 3 3 Regulatory Implementation Requirements oooconioccnocononccconononnnonnnonnocono cono nonncconncnnno 17 OA Design HEES ee 20 6 4 1 Technological Design Requirements iS 20 6 4 1 1 Materials Suitability and Safety oooocoionnonnonioninnoncnancnnnnononcnnncnnnconoconon con ac nnacnno 20 6 4 2 Regulatory Design Ketter ei Eesen E 21 6 4 3 Standards Related Design Reourements cono connncon cono nocinoo 21 6 4 4 Integration Related Design Requirement oooooocnccccnocononoconononnnonnnonnnoconocnno nono ncnnncnnns 21 l MOSFIRE Requirements_1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 Table of Contents To Optica REQUIEM SIS SEAS AAA 22 7 1 Purpose and ODIN AA ES IAEA E A A At a 22 7 2 Performance A A A RO 23 7 2 1 Parametric Performance Requires feel le 23 Tzk Typical Parameters i aA E E 23 A e CtCES 95i 55 sisin ead she vald nanan dh caglecia w ones d oeands mesa emia ovaalen usta meet nue ye 24 KS Operational Performance Requirements ui cita 25 SE Observing Modes A E 25 E E 25 EL E E EE 26 7 2 2 4 E A es aeenta canes muses oulgenanen ex teancasasect 26 7 3 Implementation Requirements 22 23 ee ee 26 7 3 1 Feature Implementation Reoureme
82. mpatible with the existing Keck I Cassegrain panel pinout and connector The rotator should be equipped with a local control switch to defeat remote control during service and maintenance operations The rotator module should be equipped with a motion stop switch to prevent motion of the mechanism during emergencies service and maintenance 9 3 1 3 Target and Embedded Computers If a target computer is a PC type computer located on or integral to MOSFIRE it should be an industrial server grade 1U 19 EIA rack mount computer equipped with a flash disk as the system disk and running a WMKO approved operating system The computer should be equipped with local monitor mouse and keyboard connections for test and diagnostic purposes If a CD ROM drive is required it should be a removable external drive that is connected when required for maintenance 49 MOSFIRE Requirements 1_0 doc 3 30 2006 SEET W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 If a remote computer is used for a target computer the computer should be a Sun workstation or server running a WMKO approved version of the Solaris operating system 9 3 1 4 Instrument Connection Panel All interconnections to the MOSFIRE instrument should be made at a single location on the stationary portion of the rotator frame This location should be provided with one or more instrument connection panels where all electronic
83. munications for control and status information between subsystems and modules should be implemented using the TCP IP protocol over a 100Base TX Ethernet interface Purpose built or custom designed electronic modules and circuits that require such communication should be designed with these protocols This is a typical specification for generation III night vision monoculars such as the ITT 160 Night Mariner 50 MOSFIRE Requirements _1_0 doc 3 30 2006 888 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 Where legacy or COTS hardware is used and only serial communications is available RS 232 signal levels with an asynchronous 8 bit format may be used RS 232 data rates should be the maximum practical for the required cable length and RS 485 levels with electrical isolation to prevent common mode problems and ground loops should be used for cable runs longer than 3 meters All RS 232 controlled devices should be interfaced to the instrument computers using a terminal server The Lantronix ETS8PS is the preferred terminal server at WMKO 9 3 3 Standards Implementation Requirements 9 3 3 1 Electrical Safety The design and construction of the wiring for MOSFIRE should conform to the requirements of UL Standard for Safety 508 Industrial Control Equipment The relevant portions of UL 508 may be summarized as follows 1 Specific metal gauge requirements are given in tabl
84. n of the sky 3 Skew is defined as the amount by which the instrument optical axis deviates from telescope optical axis over a full 360 rotation by the rotator 8 2 1 4 Vacuum integrity The MOSFIRE dewar should be capable of maintaining its internal vacuum for a period of more than 25 weeks under continuous CCR cooling without pumping 8 2 1 5 Vacuum Pump If required to protect the instrument in the event of an unintended warm up an on instrument vacuum pump may be provided This pump must be provided with remote control facilities and must tolerate all orientations when not operating without impairment of performance or leakage of oils or other fluids 33 MOSFIRE Requirements _1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 8 2 1 6 Power Dissipation The MOSFIRE dewar electronics and rotator must not radiate more than 50 watts of heat into the telescope dome ambient environment All heat generated by the MOSFIRE dewar electronics or rotator in excess of this amount must be carried away by a glycol based cooling system This requirement does not apply to the on instrument vacuum pump but this pump should not be capable of automatic operation while MOSFIRE is installed on the telescope 8 2 2 Operational Performance Requirements 8 2 2 1 Operating Temperature Range MOSFIRE should be designed for operation over the ambient temperature range given in
85. ne 12 4 Design Requirements 12 4 1 Technological Design Requirements None 12 4 2 Regulatory Design Requirements None 12 4 3 Standards Related Design Requirements None 12 4 4 Integration Related Design Requirements None Ms MOSFIRE Requirements 1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 13 RELIABILITY REQUIREMENTS 13 1 Purpose A process should take place to confirm that the MOSFIRE instrument will provide a high level of reliability for a 10 year lifetime 13 2 Scope Unless otherwise indicated all of the requirements of this section apply to all components of MOSFIRE 13 3 Procedure for Reliability Determination A recommended procedure to determine the reliability of MOSFIRE is the use of the reliability prediction models for electronic components and systems given in MIL HDBK 217F 2 Reliability Prediction of Electronic Equipment and the reliability prediction models for mechanical components and systems given in the Naval Surface Warfare Center Handbook of Reliability Prediction Procedures for Mechanical Equipment NSWC 98 LE1 The MTBF as determined by the prediction models should then be used to establish the operating period before failure based on a 10 year period as follows R t exp war where R t probability of operation without failure for time t t time in hours 1 MTBF gt all component failu
86. nets or other forms of approved enclosures A conductor used as a grounded conductor shall be identifiable and distinguishable from all other conductors A conductor used as an equipment grounding conductor shall be identifiable and distinguishable from all other conductors No grounded conductor may be attached to any terminal or lead so as to reverse designated polarity A grounding terminal or grounding type device on a receptacle cord connector or attachment plug may not be used for purposes other than grounding Conductors and equipment shall be protected from overcurrent in accordance with their ability to safely conduct current Overcurrent devices may not interrupt the continuity of the grounded conductor unless all conductors of the circuit are opened simultaneously Overcurrent devices shall be readily accessible to each employee or authorized building management personnel These overcurrent devices may not be located where they will be exposed neither to physical damage nor in the vicinity of easily ignitable material Fuses and circuit breakers shall be so located or shielded that employees will not be burned or otherwise injured by their operation due to arcing or suddenly moving parts Circuit breakers shall clearly indicate whether they are in the open off or closed on position The path to ground from circuits equipment and enclosures shall be permanent and continuous Exposed non current carrying metal parts of fixed equi
87. nt Draft Requirements for MOSFIRE March 30 2006 2 10 11 12 13 14 15 Metal enclosures for conductors shall be grounded 17 18 19 Conductors shall be spliced or joined with splicing devices suitable for the use or by brazing welding or soldering with a fusible metal or alloy Soldered splices shall first be so spliced or joined as to be mechanically and electrically secure without solder and then soldered All splices and joints and the free ends of conductors shall be covered with insulation equivalent to that of the conductors or with an insulating device suitable for the purpose Parts of electric equipment which in ordinary operation produce arcs sparks flames or molten metal shall be enclosed or separated and isolated from all combustible material Electrical equipment may not be used unless the manufacturer s name trademark or other descriptive marking by which the organization responsible for the product may be identified is placed on the equipment Other markings shall be provided giving voltage current wattage or other ratings as necessary The marking shall be of sufficient durability to withstand the environment involved Each disconnecting means for motors and appliances shall be legibly marked to indicate its purpose unless located and arranged so the purpose is evident Live parts of electric equipment operating at 50 volts or more shall be guarded against accidental contact by approved cabi
88. ntional disconnection all motion on the associated axis 1s inhibited 10 5 2 Regulatory Design Requirements As indicated in the sections for overall mechanical and electrical requirements the design of MOSFIRE must conform to all applicable regulatory requirements 10 5 3 Standards Related Design Requirements None 10 5 4 Integration Related Design Requirements None 61 MOSFIRE Requirements 1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 11 SOFTWARE REQUIREMENTS 11 1 Purpose and Objectives The software requirements section describes requirements for performance implementation and design Based on experience with previous instruments the observatory is sensitive to certain aspects of performance implementation and design that have proven to be important factors in the up time of its instruments The software requirements section has as a main objective ensuring compatibility of the MOSFIRE software with existing observatory software systems A secondary objective is guiding the selection of software architecture and implementation decisions towards those that fit within the software skill sets at the observatory in order to maximize the ability of the observatory to support and maintain the MOSFIRE software WMKO has established a number of standards for software and these standards form an integral part of the software requirements for MOSFIRE Spec
89. nts 26 Pok Dewar WI Oia En tateameras 26 TI Ee science Detector Focus CA sar ae E a nein 26 pe A Ee 2T 7 3 2 Common Practice Implementation Requirements ooooocccoccnoccconncconccconocancnonnnconncnnno 27 7 3 3 Standards Implementation Requirements oooocnoconoccoonccoonnonnnoonnoconocono cono ccoo ccconccnnnos 27 7 3 4 Regulatory Implementation Requirements oooconnoccnococooccconoconnnonnnonnoconocnnononncconncnns 27 TA KE RR EE 27 7 4 1 Technological Design Requirements incisiones dicci n diia 27 7 4 1 1 Optical Component Mountings eeneg 27 RE Alignment Toleran ing EE 28 7 4 2 Regulatory Design Requirements eege eege EEN 28 7 4 3 Standards Related Design Reourements cono noon coco nocinnos 28 7 4 4 Integration Related Design Requirements oooooocnocccnocononoconoconononnnonnnoconocanononncconncnns 28 744 EE 28 Mechanical Read 29 8 1 Purpose and ODESSA AA A A a AN AA 29 8 2 Performance Requirements iia lll a 30 8 2 1 Parametric Performance Requirements 24 a eege Ee 30 SLE gt o A A Nac met ane ec cilics 30 8 2 1 2 MOSFIRE Instrument Mechanisms ccssccssscssssssscssstscssnssencesacessesesneeees 31 A E Rotator enie dreii Aah eae et en heh el eee pees 33 8214 Vacuum EEN ee 33 SL ar VACIO ee e a ae An ae 33 8 2 1 67 Power Dissipation ssanie cee aches eae as 34 8 2 2 Operational Performance Regumements nono nocnocono cono cconncinns 34 8 2 2 1 Operating Temperature Range a 34 82 22 do E EE 34 ii MOSFIR
90. od 503 Relative condensing Packaged equipment may be subjected to all possible gravity orientations during transportation and shipping 7 10 Hz to 40 Hz 6dB oct drop off to 500 Hz all axes 8 See MIL STD 810F Method 514 9 0 015 second half sine all axes 10 All axes 11 0 5 Hz to 100Hz all axes NARA SEA MOSFIRE Requirements_1_0 doc 3 30 2006 SS SST W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 6 2 1 1 2 Non Operating Environment MOSFIRE shall meet all of the performance specifications without repair or realignment after being subjected to any number of cycles of any of the non operating environment conditions defined in Table 5 These represent environments associated with normal non operating telescope activities including but not limited to storage and handling within the facility and installation and removal from the telescope Table 5 Non Operating Environment Parameter Min Typ Max Units Notes Altitude 0 4300 m Temperature Range 10 0 30 C 1 Rate of change 0 8 0 8 C h Humidity 0 90 2 Gravity orientation 1 g 3 Vibration g 8 0x10 g Hz 4 Shock 15 g 5 Acceleration Due to handling g 6 Due to seismic activity 2 g 7 Notes Relative non condensing ool OY Oe 0 5 Hz to 100Hz all axes MOSFIRE Requirements_1_0 doc 3 30 2006 Nor
91. pectroscopy are the most difficult and will require extremely long integration times even with a 10m aperture the ability to observe many objects at once will make such challenging observations feasible for the first time The Keck Observatory needs a new near IR MOS in order to pursue such studies MOSFIRE is being designed as a Cassegrain instrument for the Keck I telescope because of the current imbalance in demand for observing time between the two telescopes MOSFIRE on Keck I will help in achieving a better balance between Keck II and Keck I 5 3 Overview 5 4 System Overview The scientific and technical requirements for MOSFIRE result in the following basic system components 1 An optical system to relay the required field of view onto the science detector and a dispersion system capable of achieving the required resolving power 2 A vacuum cryogenic dewar to contain the opto mechanical system 3 Anopto mechanical system consisting of a A support structure for the optical system b A cryogenic cooling system capable of reaching operating temperatures of 120 K to 130K A CSU with up to 45 slits Mechanisms for selection of filters and imaging or spectroscopic mode An internal flexure compensation system A cable wrap HO pao 7 MOSFIRE Requirements 1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 4 An instrument rotator 5 An instrument handler syst
92. pment which may become energized shall be grounded Exposed non current carrying metal parts of cord and plug connected equipment which may become energized shall be grounded Non current carrying metal parts of fixed equipment if required to be grounded shall be grounded by an equipment grounding conductor which is contained within the same raceway cable or cord or runs with or encloses the circuit conductors For DC circuits only the equipment grounding conductor may be run separately from the circuit conductors For the purposes of the foregoing approved means acceptable to the authority enforcing the applicable subpart The authority enforcing the applicable subpart is the Assistant Secretary of Labor for 18 MOSFIRE Requirements _1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 Occupational Safety and Health The definition of acceptable indicates what is acceptable to the Assistant Secretary of Labor and therefore approved within the meaning of the applicable subpart Approved for the purpose means approved a specific purpose environment or application described in a particular standard requirement Suitability of equipment or materials for a specific purpose environment or application may be determined by a nationally recognized testing laboratory inspection agency or other organization concerned with product evaluation as part of its
93. pplied in revised form as required to reflect the delivered as built instrument User s manual including but not limited to operating instructions Revised fabrication procurement drawings specifications and schematics that accurately depict the as built condition of all of the components of the instrument All such drawings should be detailed enough to allow fabrication of spare parts should the need arise Bills of material including supplier information for all components of the instrument A maintenance manual including all information and procedures needed to maintain and operate MOSFIRE during its lifetime including but not limited to the following a Procedures for handling assembly and disassembly of the instrument and all of its components accurately reflecting the as built instrument All assembly instructions shall be clear and include a tools list parts lists and check list b Routine maintenance and inspection procedures as well as a maintenance schedule c Alignment procedures d Troubleshooting guide e Repair procedures Acceptance Test Plan documents test procedures and all performance data and results of acceptance testing Descriptions of all recommend spare parts and procedures for removal and replacement including written procedures and assembly drawings and exploded view drawings All manufacturer s manuals and documentation for COTS components 74 MOSFIRE Requirements _1_0 doc 3 30 2006
94. quirements 1_0 doc 3 30 2006 255 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 8 3 1 7 Glycol Cooling When glycol cooling is required the following conditions apply The temperature rise of coolant through the instrument heat exchanger should be less than 3 C The heat load should be less than 1800 watts All glycol cooling should be plumbed with braided stainless steel hose and stainless steel fittings Custom manifolds should be used rather than arrangements of T fittings and hose Permanent connections should be made with JIC 37 flare compression fittings or SAE straight thread O ring fittings Teflon tape should not be used to seal threaded connections Removable connections should be made with Le Parker Hannifin series FS quick disconnect fittings The instrument supply coupler is male and the return coupler is female Where required King Instrument Company flow meters and needle valves are preferred for flow metering and control applications Where variable gravity orientations are encountered a spring loaded variable area flow meter such as the in line flow meters manufactured by the Hedland Division of Racine Federated Inc should be employed The Hedland T303 stainless steel models are preferred All glycol cooling systems should be provided with a flow switch Proteus Industries Inc type 100B110 is preferred to generate a loss of coolant alarm This flow switch
95. quirements_1_0 doc 3 30 2006 SS SST W M KECK OBSERVATORY Instrument Program Management g g Draft Requirements for MOSFIRE March 30 2006 3 2 3 2 1 Referenced Standards Industry Consensus Standards Table 1 lists the industry consensus standards referenced in this document in alphabetical order by Unless otherwise noted all references to standards are included because compliance with some part of each standard may be required standardizing organization Table 1 Referenced Standards Source Organization Number Title or Standardizing Body ANSI Y14 5M 1994 R1999 Dimensioning and Tolerancing ANSI Y14 1 1995 R2002 Decimal Inch Drawing Sheet Size And Format ANSI Y14 34 2003 Parts Lists Data Lists And Index Lists Associated Lists ANSI Y14 3M 1994 Multi And Sectional View Drawings ANSI ASME Y14 18M 1986 Optical Parts Engineering Drawings and Related Documentation Practices ASME HPS 2003 High Pressure Systems ASME Y14 100 2000 Engineering Drawing Practices ASME Y32 10 1967 R1994 Graphic Symbols for Fluid Power Diagrams ASTM E595 93 2003 e1 Standard Test Method for Total Mass Loss and Collected Volatile Condensable Materials from Outgassing in a Vacuum Environment ATA Spec 300 2001 1 Specification for Packaging of Airline Supplies CENELEC EN 50082 1 1997 Electromagnetic compatibility Generic immunity standard Part 1 Residential commer
96. rain size of molecular sieve material should be selected to minimize the potential for migration of sieve material from the sieve holder Electropolished stainless steel mesh should be used for the sieve holder All components of the sieve holder must withstand baking at temperatures up to 350 C without damage outgassing except for adsorbed water or deterioration 8 3 1 9 Cryogenic Systems Where auto fill systems are employed for LN cryogen they should be compatible with the auto fill systems currently in use at the observatory In the event of auto fill failure manual fill must be possible Cryogenic systems should provide adequate cryopumping capability to completely condense all residual gasses remaining at initial cool down CCR heads should be vibration isolated from the instrument dewar Manifolds should be provided for the distribution of helium to the CCR heads according to the capacity of the associated compressors in order to minimize the number of instrument interconnections required 8 3 2 Common Practices Implementation Requirements 8 3 2 1 Fit and Finish All steel or iron components should be plated or painted to prevent rust This includes fasteners and rivets Welds not ground to the surface or joint profile should be of dress quality All welds and castings must be stress relieved prior to painting and assembly Machined components should be free of tool marks scratches and material flaws such as inclusions or voi
97. re rates The probability of operation without failure for MOSFIRE is expected to be more than 0 90 for this time period t 87600 hours Software is not included in this requirement or the requested method of reliability assessment The reliability of the software to be used with MOSFIRE can only be determined by testing 14 SPARES REQUIREMENTS TBD Hs MOSFIRE Requirements _1_0 doc 3 30 2006 38888 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 15 SERVICE AND MAINTENANCE REQUIREMENTS MOSFIRE must incorporate provisions for disassembly for servicing of internal components Handling fixtures and any specialized tools required for servicing must be provided with MOSFIRE A written procedure accompanied by illustrations must be provided for removal and replacement of all major sub assemblies in MOSFIRE 73 MOSFIRE Requirements 1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 16 DOCUMENTATION REQUIREMENTS 16 1 Documentation Package The MOSFIRE instrument should be provided with design operating and maintenance documentation package including but not limited to the following l System overview and design description including details of optical design mechanical design including thermal and vacuum design electrical design and software design All design documents shall be su
98. s between the optical component and the mount Mountings must also ensure that alignment of optical components without excessive stress is maintained at all rotator angles and telescope elevations Materials used in optical component mountings particularly elastomers and adhesives must be compatible with the coatings on the associated optical components All materials used within the dewar must be compatible with vacuum and cryogenic environments see 8 4 1 1 D7 MOSFIRE Requirements 1_0 doc 3 30 2006 255 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 7 4 1 2 Alignment Tolerancing Before assembly all optical components and systems must have a documented optical alignment tolerance budget During assembly measurements must be made as required to ensure that the stack up of tolerances does not exceed the tolerance budget 7 4 2 Regulatory Design Requirements None 7 4 3 Standards Related Design Requirements Drawings for optical components should conform to American National Standards Institute ANSI American Society of Mechanical Engineers International ASME standard Y14 18M 1986 Optical Parts Engineering Drawings and Related Documentation Practices 7 4 4 Integration Related Design Requirements 7 4 4 1 Focal Position MOSFIRE will be compatible with the f 15 Cassegrain focus of the Keck I telescope 28 MOSFIRE Requirements_1_0 doc 3 30 2006 W M KECK
99. s through direct hardware interfaces Target software may run on so called embedded computers that are part of the instrument s electronics hardware or target software may run on a remote computer connected via data communications interfaces to hardware that has its own embedded computer that runs its own control software and does not directly execute the target software See 9 3 1 3 for operating system and computer hardware requirements In general target software will implement a keyword service to allow control of the instrument s electronic or electromechanical systems In some cases such as the rotator target software the target software may also implement client functionality for example when monitoring DCS commands to determine rotator position Communications with the host software should be via TCP IP and the Keck Keyword Interface 11 5 1 5 Host Software MOSFIRE host software should provide the user interfaces for instrument control and image display All host software functions should be accomplished using keywords conforming the to the Keck Keyword Interface standards Additional host software design requirements are TBD 11 5 1 6 Science Data File Formats Header data for the science data files will incorporate keywords that fully describe the conditions under which the data in the file was taken Science FPA mosaic data is to be written as a FITS format file 11 5 2 Regulatory Design Requirements None 68
100. ser interfaces that should be provided Table 18 MOSFIRE Graphical User Interfaces Name Description MOSFIRE Exposure Control GUI Sets up exposures integration time coadds etc and starts and aborts them MOSFIRE Exposure Status GUI Tracks the progress of an exposure showing parameters of the current exposure and the remaining integration time MOSFIRE Mechanism Control GUI Controls the mechanisms of the instrument only filter and observing mode imaging or spectroscopy parameters are provided and the filter pupil wheel grating turret and focus mechanisms are moved according to those two parameters MOSFIRE Mechanism Status GUI Shows the status of each MOSFIRE mechanism except the CSU MOSFIRE CSU Control GUI Provides controls to configure the CSU MOSFIRE CSU Status GUI Shows current position of bars in CSU MOSFIRE Temperature Control Provides controls to set the MOSFIRE science detector operating GUI temperature MOSFIRE Temperature Status GUI Shows current temperatures at various locations in the instrument MOSFIRE Pressure Status GUI Shows the current dewar pressure MOSFIRE Power Control GUI Provides controls to turn on and off power to selected components MOSFIRE Power Status GUI Displays the power status of selected components MOSFIRE Telescope GUI Provides an interface to the telescope drive and control system such as offsetting and control of the instrument rotator
101. so be provided Documentation for the instrument software consisting of a Users Manual a detailed tutorial describing how to use this version of the software b List of Source Code A hierarchical list of all directories source files include files libraries etc that can be used as a checklist for new releases c Functional Descriptions a description of each routine or module describing its function d Startup Shutdown procedures descriptions of the steps necessary to cold start the system and the steps necessary to safely shut down a running system This document should include descriptions of any configuration files required at start up time e Installation Manual a detailed description of the steps necessary to rebuild and install the system from sources 78 MOSFIRE Requirements _1_0 doc 3 30 2006 38888 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 f Troubleshooting Guide A description of the techniques for tracking down failures checking system health killing and re starting portions of the system without a full reboot g Software Test Procedures a detailed description of how to run the software acceptance tests h Programmer s Manual This document shall include a description of the theory of operations data and control flow and how standard functionality can be extended e g add a new command to the API 79 MOSFIRE Requirements 1_
102. stantaneous trip breaker is used the rating of the breaker shall not exceed 250 of the continuous full load current of the connected load The panel where the fuse or circuit breaker is located shall be clearly marked with the type and rating of the protective device ee MOSFIRE Requirements_1_0 doc 3 30 2006 SEET W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 9 3 4 5 Grounding and Shielding The enclosures of ac line connected components shall be grounded in conformance with the requirements of the National Electric Code and any local codes Grounding conductors shall be continuous and bonded to the enclosure in at least one point The grounding point shall be specifically provided for the purpose and shall not be a screw or nut used for mounting components or covers Any paint or surface treatment that acts as an insulator shall be removed in order to ensure a good electrical contact for the ground connection All components capable of generating electromagnetic emissions in excess of the limits established in the standards referenced in 9 3 3 2 above will be shielded and the shielding grounded to limit electromagnetic emissions to the levels allowed by the standards referenced in 9 3 3 2 All components susceptible to externally generated electromagnetic emissions in excess of the limits established in the standards referenced in 9 3 3 2 above will be shielded and the shielding
103. strument Program Management Draft Requirements for MOSFIRE March 30 2006 The profile of all service fixtures or stands must be designed with as low of a center of gravity as possible to resist tipping Seismic restraints may also be required Handling provisions fixtures and stands must be designed for safe operation and with consideration for ergonomic factors such as range of motion and working posture Any temporary clean room or dust cover facilities required for service should be provided with the instrument 45 MOSFIRE Requirements_1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 9 ELECTRONIC ELECTRICAL REQUIREMENTS 9 1 Purpose and Objectives The purpose of this section is to describe requirements for the performance implementation and design of the MOSFIRE electronic and electrical systems In many cases these requirements reflect the preliminary electronic and electrical design of the instrument The electronic electrical requirements address issues of safety design reliability and maintainability Based on experience with previous instruments the observatory is sensitive to certain aspects of performance implementation and design that have proven to be important factors in the up time of its instruments The electronic electrical requirements section has as a main objective the description of specific requirements for implementation and des
104. t Draft Requirements for MOSFIRE March 30 2006 1000 VCA Curve VCC Curve a 1004 E a 2 E PSST fe 10 4 1 r r 1 10 100 1000 One third Octave Band Center Frequency Hz Figure 3 Keck I Telescope Equipment Vibration Limits 8 3 Implementation Requirements 8 3 1 Feature Implementation Requirements 8 3 1 1 MOSFIRE Instrument Dewar Because the mechanisms internal to the MOSFIRE instrument dewar are difficult to access for service features should be provided that maximize the reliability of the mechanisms and provide as much information as possible about the status and performance of each mechanism All MOSFIRE instrument dewar mechanisms should provide a positive indication that the requested move s have been completed The use of a relative position indicating means in conjunction with limit switches is preferred Mechanisms should operate properly with reduced speed over the ambient temperature range given in 6 2 1 1 3 This is essential to permit servicing and verification of proper operation prior to evacuation and cooling of the instrument dewar 35s MOSFIRE Requirements_1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 8 3 1 2 Handler The handler must incorporate structural components that will maintain its integrity and ensure secure mounting during an earthquake with the MOSFIRE instrument install
105. t science detector and associated components Instrument Cable Wrap a structure attached to the rear of the dewar to allow connections between the stationary telescope interface panel and the instrument mounted in the rotator Instrument Electronics Racks EIA 19 inch rack cabinets meeting the NEMA 4 specifications mounted to the rear of the instrument cable wrap that contain the control electronics and interfaces required for operation of the instrument Handler the support and handling structure for MOSFIRE The handler travels on a rail system integral to the Cassegrain platform and Nasmyth deck of Keck I The handler is moved using a detachable tractor assembly Rotator the rotator is a structure in which the dewar cable wrap and electronics racks are mounted and which rotates the dewar cable wrap and electronics racks about the telescope s optical axis in order to compensate for the image rotation that occurs as the telescope follows the sidereal motion of the sky MOSFIRE Guider MOSFIRE is equipped with an off axis guider mounted adjacent to the main dewar window The guider consists of two major subsystems the guider optics and the guider camera The guider optics are custom designed and built as part of the MOSFIRE project The guider camera will be supplied by the Observatory MOSFIRE computer a computer dedicated to providing software functions for MOSFIRE There will be two or more of these and they are divided into two bro
106. t insert locknuts should have Kel F or Vespel inserts and should only be used where subsequent removal is not anticipated 8 3 2 5 Lubricants Lubricants must be suited for the low temperature environment encountered at the summit The base oil in a grease lubricant should have a high viscosity index a low pour point temperature and a low viscosity at the average operating temperature based on a 0 C ambient Greases using synthetic base oils such as Fluoroether or Silicone are preferred 8 3 2 6 Lubricated Components Exposed lubricated components such as gear trains or lead screws should be enclosed in a shroud or boot to prevent the collection of dust and dirt and also to prevent accidental contact that may result in the transfer of the lubricant to other surfaces 8 3 3 Standards Implementation Requirements 8 3 3 1 Structural The structure of MOSFIRE should meet the zone 4 earthquake survival requirements of Telcordia Standard GR 63 CORE NEBS Requirements 8 3 3 2 Vacuum Systems Vacuum systems should be implemented in conformance with the requirements of ASME HPS 2003 High Pressure Systems and NFPA 99C Standard on Gas and Vacuum Systems 2005 edition 8 3 3 3 Cryogenic Systems Cryogenic systems should be implemented in conformance with the requirements of NFPA 55 Standard for the Storage Use and Handling of Compressed Gases and Cryogenic Fluids in Portable and Stationary Containers Cylinders and T
107. tation Requirements See 6 3 3 9 3 3 and 9 3 4 10 5 Design Requirements 10 5 1 Technological Design Requirements 10 5 1 1 MOSFIRE Instrument Dewar No part of any MOSFIRE mechanism should move when ac mains power is applied to or removed from MOSFIRE The MOSFIRE motion control hardware should inhibit all motion during a power on reset If closed loop or servo systems are used in the MOSFIRE motion control systems these servo loops should be designed so that loss of the encoder signal or disconnection of the motor cannot result in a wind up of the servo position command Software features should be implemented to inhibit motion when the position error measured by the servo controller exceeds the smallest reasonable margin that reflects all of the expected operating conditions Limit switches should be closed when not actuated N C contacts Motion control software should be designed so that a disconnected limit switch will appear to be active inhibiting further motion towards that limit Motion control software should also be designed so that movement away from an active limit switch is restricted to a reasonable distance past the limit switch actuation point after which motion is stopped and an error indicated due to the apparent failure of the limit switch to open If used position encoders should include a status loop through the connections to the encoder so that in the event of loss of the encoder connection or intentional
108. tiple sampling schemes 5 Amount of charge detected in a black frame readout immediately following a readout where or more pixels are exposed to 90 or more of the maximum detector charge storage capacity 6 The wavelength cut on is the wavelength at the short wavelength end of the spectral response where the detector QE drops to 50 of the mean value in the Y band 7 The wavelength cut off is the wavelength at the long wavelength end of the spectral response where the detector QE drops to 50 of the mean value in the K band 8 Operability refers to the number of pixels that provide full specifications Reduced specifications for pixels outside of the operability limits and the limit on dead pixels are TBD 9 Maximum read time must be below the value required to ensure that background flux in the K band does not exceed one half of the charge storage capacity 47 MOSFIRE Requirements 1_0 doc 3 30 2006 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 It is recognized that high pixel count HgCdTe detectors will not have 100 functional pixels However given the desire for a high level of imaging performance and the potential for uniformity problems due to operability limits and the location and number of dead pixels should be given special attention in the specifications for the detectors Since the final sensitivity of the instrument is dependent upon both optical throughput
109. to prevent corrosion in the operating environment see Table 6 over a normal 10 year lifetime of operation including handling maintenance and repair All removable fasteners must be plated or treated to prevent corrosion Internal components may be plated or paint finished A contractor who can show conformance to the requirements of MIL STD 171E Finishing of Metal and Wood Surfaces or equivalent should perform any required painting plating or anodizing 8 3 2 4 Fasteners Press fit studs or threaded inserts must be installed in the correct material i e no aluminum inserts in steel according to the manufacturer s instructions Samples of such fasteners installed in the actual material should be obtained and subjected to pull out tests prior to use in an actual design Self tapping screws should not be used for removable covers or to secure components that will have to be removed for repair or replacement Fasteners should have either Phillips or hex socket heads Hex socket button head fasteners should not be used except where space or specific function requires them Undercut machine screws should not be used except in special cases where there is no other appropriate design alternative 40 MOSFIRE Requirements_1_0 doc 3 30 2006 255 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 Prevailing torque locknuts or lock washers are preferred to thread locking compounds Sof
110. uments must be protected during installation and handling against the entry of these contaminants in particular care must be taken with optical surfaces precision mechanisms and fine pitch or fiber optic connectors 6 2 2 2 Audible Noise Unless otherwise specified or accepted MOSFIRE and any pumps motors outboard electronics or computers should not at any time produce audible noise in excess of 50 dBA at a distance of 1 meter This is a standard office operating environment maximum noise level This includes intermittent noises from pumps and variable speed cooling fans Audible warning signals for emergency or fault conditions are exempt from this requirement but they must be provided with a silence after delay feature or a manual silencing switch 15 MOSFIRE Requirements 1_0 doc 3 30 2006 89 W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 6 2 2 3 Telescope Reconfiguration MOSFIRE should be designed to facilitate telescope reconfigurations by allowing complete disconnection of all power and control signals glycol and closed cycle refrigerator CCR helium lines when the instrument is to be moved during telescope reconfigurations Disconnection durations of up to 30 minutes should not impair the performance of the instrument 6 2 2 4 Power Failure Tolerance The observatory summit facilities provide backup power to the instrument electronics The first level of backup is t
111. uration 6 Amount of variation in the unexposed portion of a series of short dark frame exposures taken at the operating temperature with the detector temperature controller in operation and maintaining the detector 9 2 1 4 Power Dissipation See 8 2 1 6 9 2 1 5 Compatibility MOSFIRE must be electrically compatible with the telescope environment 48 MOSFIRE Requirements 1_0 doc 3 30 2006 ego W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 9 2 1 6 Temperature and Humidity All electronics in MOSFIRE should be designed for operation in an ambient temperature range of 10 C to 30 C and a relative humidity of 95 non condensing 9 2 1 7 Cable and Wire Ratings All wire and cable will be rated for an ambient temperature range of 30 C to 100 C 9 2 2 Operational Performance Requirements None 9 3 Implementation Requirements 9 3 1 Feature Implementation Requirements 9 3 1 1 Emergency Stop Input The MOSFIRE instrument should be provided with an emergency stop input that stops all instrument motion including the rotator and closes the entrance window cover when the observatory emergency stop signal is activated 9 3 1 2 Rotator The rotator drive system should be designed to be compatible with the Keck I Cassegrain auxiliary servo amplifier The pinout and connector type for the interconnection of the rotator to the Keck I Cassegrain panel must be co
112. urther requirements for the DRP are TBD 11 4 1 5 MOSFIRE Instrument Dewar All MOSFIRE target computer s should be configured to auto boot their operating systems and auto execute their target application software and at power on reset 11 4 1 6 Software Licenses Any licensed software required for operation of the MOSFIRE software must be supplied with an adequate number of fully paid licenses to permit operation of all MOSFIRE software Node locked licenses will be required for each host or target computer where applicable 662 MOSFIRE Requirements_1_0 doc 3 30 2006 SET W M KECK OBSERVATORY Instrument Program Management Draft Requirements for MOSFIRE March 30 2006 11 4 2 Common Practice Implementation Requirements MOSFIRE host and target software should be written in C C to run under a WMKO approved operating system All communications between the instrument software components and the user interfaces and the telescope systems will be based on keywords conforming to WMKO standards Where Java is used to develop user interfaces the implementations should be consistent with the OSIRIS implementations Java user interfaces must run under the current versions of the Solaris operating systems and Solaris window managers in use at WMKO 11 4 3 Standards Implementation Requirements MOSFIRE software should conform to the requirements of KSD 201 and KSD 210 All communications between the MOSFIRE target software and the MOSFIR
113. ze weight and shipment method to be employed are acceptable For guidance in the design of suitable containers consult Air Transport Association ATA Spec 300 2001 1 edition Specification for Packaging of Airline Supplies 6 3 3 Regulatory Implementation Requirements MOSFIRE shall comply in all respects with the applicable requirements of the Occupational Safety and Health Administration OSHA as established by Code of Federal Regulations CFR 29 Part 1910 Occupational Safety And Health Standards particularly subpart O section 1910 212 and subpart S sections 1910 302 through 1910 304 The requirements of Subpart O section 1910 212 that are applicable to MOSFIRE are summarized as follows 1 Machine guarding must be provided to protect the operator and other employees from hazards such as those created by ingoing nip points or rotating parts 2 Guards shall be affixed to the machine 3 Revolving barrels and drums shall be guarded by an enclosure that is interlocked with the drive mechanism so that the barrel or drum cannot revolve unless the guard is in place The requirements of Subpart S sections 1910 302 through 1910 304 that are applicable to MOSFIRE may be summarized as follows I Listed or labeled equipment shall be used or installed in accordance with any instructions included in the listing or labeling AT MOSFIRE Requirements_1_0 doc 3 30 2006 SEET W M KECK OBSERVATORY Instrument Program Manageme

MOSFIRE Requirements v1.0 - UCLA Infrared Laboratory

Contents

Download Pdf Manuals

Related Search

Related Contents