M88-E01105 VANTEC-2000 User Manual.book
Contents
1. Table 1 2 Greek and Roman text M88 E01105 151 About This User Manual VANTEC 2000 User Manual 1 1 2 Warnings Cautions and Notes This User Manual contains notices that you must observe to ensure your own personal safety as well as to protect the product and connected equipment These notices are highlighted in the User Manual and are marked as follows according to the level of danger A WARNING The word WARNING alerts the reader to an immediate or potential hazard that can result in death severe personal injury or substantial property damage YN CAUTION The word CAUTION alerts the reader to a potential practice or condition that could result in minor personal injury or damage to the product or property NOTE The word NOTE in bold capital letters draws your attention to particularly important information on the product or handling of the product or to a particular part of the product documentation AN The symbol shown above is used whenever high voltage is present 1 2 Referenced Documentation Table 1 3 contains a list of documentation referenced in this User Manual It is recommended to have this additional documentation available as you work with this User Manual In the documents part numbers a variable revision number is referred to by a lowercase letter x Always use the most current revisions available Documentation Title Part Number lt none as of this pu2. VANTEC 2000 e User Manual Part Number M88 E01105 Publication date 22 May 2007 think forward BRUKER Bruker AXS X ray Diffraction VANTEC 2000 User Manual This document covers the VANTEC 2000 area detector References to this document should be shown as M88 Exx105 VANTEC 2000 User Manual 2007 Bruker AXS Inc 5465 East Cheryl Parkway Madison WI 53711 All world rights reserved Notice The information in this publication is provided for reference only All information contained in this publication is believed to be cor rect and complete Bruker AXS Inc shall not be liable for errors contained herein nor for incidental or consequential damages in conjunction with the furnishing performance or use of this material All product specifications as well as the information con tained in this publication are subject to change without notice This publication may contain or reference information and products protected by copyrights or patents and does not convey any license under the patent rights of Bruker AXS Inc nor the rights of others Bruker AXS Inc does not assume any liabilities arising out of any infringements of patents or other rights of third parties Bruker AXS Inc makes no warranty of any kind with regard to this material including but not limited to the implied warranties of merchantability and fitness for a particular purpose No part of this publication may be stored in a retrieval system transmi
3. 234 XRAY 9729 Direct line 1 608 276 3087 Fax 1 608 276 3015 E mail Customer Service bruker axs com Web http www bruker axs com Table 1 4 Bruker AXS North American Service Center contact information If the instrument is outside North America contact your local Bruker AXS Service Center 1 6 MB88 E01105 2 introduction and System Description Figure 2 1 V NTEC 2000 detector unit This User Manual covers installation and basic operation of the V NTEC 2000 area detector Because of its unique ability to detect individual photons from 0 to 500 000 counts per second the V NTEC 2000 is ideal for the analysis of weakly and or strongly scattering samples including smallest sample traces single crystals epitaxial thin films coatings rocks polymers metals steel wood plastics liquids nanomaterials and much more The active area of the detector is 14 cm by 14 cm The simultaneously recorded angular range as well as the achievable angular resolution are influenced by the sample properties the selected measurement circle diameter and the applied X ray wavelength Generally the para focusing Bragg Brentano geometry and a larger measurement circle diameter result in a better angular resolution The V NTEC 2000 detector is based on the patented MikroGap technology It offers all the benefits common with gas detectors such as high signal amplification resulting in high peak to backgro
4. 2000 User Manual 3 1 VANTEC 2000 Power Up Procedure sssssesses nn 3 1 3 2 VANTEC 2000 Power Down Procedure 200cceecceeeeeeeeteeneeees 3 2 3 3 Emergency Power Down Procedure 00eeee cece eee eee e eee nena 3 3 3 4 Disconnecting the Power Plug lesser RII 3 4 3 5 Lock QUE ne y eEPESPIVIRIWga v x ra ees Bee eoa tre ere cR aue Rus 3 4 4 Calibration s6 255 24 fiance Kee de be Gant RA RR TR REL RORIS SOS EE UR a e nca 4 1 4 1 Calibrate the Time Constants eseseeeeeseee nnn nn 4 1 4 2 Calibrate the High Voltage esellleeseeeeee RII III 4 3 4 3 Set the Detector Center in PXCConfig 0 00sec eee 4 6 4 3 4 Find and Cover the Center Hole in the Fiducial Plate 4 6 4 3 2 Image the Fiducial Plate in GADDS lsllellellellslelesess 4 6 4 83 8 Find Coordinates of Reference Point 0 0 00 cece eee eee es 4 8 4 3 4 Enter Reference Point Values into PXCConfig 0 00 0a eee eee 4 9 4 3 5 Use GADDS to Verify Correction to Center 0 000 c eee eee 4 10 4 4 Spatial Correction Calibration 0 00 e eee 4 12 4 5 Flood Field Correction Calibration cles 4 12 4 5 1 Examine Image for Defects liliis 4 12 4 6 Re Optimize the High Voltage for Your System s Radiation 4 13 5 Preventive Maintenance 0 000 e eee 5 1 5 1 Cleaning the Diffraction System and Measu
5. 2048 X pixel 1046 Y pixel 1036 Mag 8 2Theta Omega Phi chi Shutter Distance FloodF ld Spatial 2048x2048 Perform project management function Figure 4 10 Zoomed in view of the missing spot 3 Close GADDS 4 8 MB88 E01105 VANTEC 2000 User Manual Calibration 4 3 4 Enter Reference Point Values into PXCConfig 1 Open PXCConfig and select the TDC Board tab 2 Enter your measured and required reference point coordinates as shown in Figure 4 11 z PXCConfig 1 0 0 7 20 Jan 2006 RC board TDC board HV scan p Current status F1 config load 3F000000 Reg01 Configuration 40780301 Reg02 Averaging time window criteria Fo Reg03 XIXr delay compensation CEOCE Reg04 YIYr delay compensation Reg05 X event TWindow Scale Delay line time Reg06 Y event twindow scale delay line time Reg13 F1 flags status Regl4 FDC parameters Reg15 Spark suppression Rieg18 Statistic signal counter Reg22 Dither amount and fractional scale Reg23 Movie frame exposition Reg24 Movie configuration Reg25 Continuous scan configuration Reg26 Ref grid stat counter Reg2 No register expected 6206 3247 3247 990 JIU Ee Disconnect Refresh i Reg22 x 9 v 9 r Right LeIT r INI settings Speed Slow E Resolution 0 01500 r TDC constants hex Regl2 ooooFo00 Reg03 foooce ace Reg04 00062062 Reg 5 20032475 Re
6. 4 1 Technical Support 1 6 temperature 2 6 N Time Constants calibration 4 1 noise 2 3 TWindow parameters 4 2 O U outputs 2 3 Update button 4 2 Usable wavelength range 2 5 P parallel plane design 2 2 2 3 V PILOT 4 5 VANTEC 1 pixel cursor 4 8 detector active area 2 1 Plateau Detector Specifications 2 6 defined for HV scan 4 4 pressurization 2 7 Power Plug disconnection 3 4 Vibration 2 4 power switch 2 8 Power Down Procedure 3 2 W emergency 3 3 reducing high voltage 3 2 Warning Labels 1 5 Power Up Procedure 3 1 Warnings 1 2 preventive maintenance 5 1 X Q X601 quencher 2 3 not turned off by Stop button 3 3 X ray safety issues 1 4 X ray tube R service life 3 2 radiation hardness 2 4 RC board tab 4 5 Index 2 M88 E01105
7. Correct Usage A aE e TE tetas 1 3 1 3 8 Hazardous Materials 0 0000 ce ee 1 3 13 4 X ray Safety ctu hosze ve ob eds ade ecd ete legis e 1 4 1 3 5 Proper Lifting iis eer Ene REI e Pa oe do de eg qe 1 4 1 3 6 Warning Labels i riers vus epe Re em de eig du 1 5 14 Service and Technical Support for the VANTEC 2000 Area Detector 1 6 1 44 Technical Support i5 eevee RE ve perm psa day EE ER 1 6 2 Introduction and System Description llessse 2 1 2 1 V NTEC 2000 Theory of Operation 000cc eee runnen nnn 2 2 2 1 4 X ray Photon Conversion and Electron Multiplication 2 2 2 1 2 Eliminating Sparking 0 c cc tees 2 3 2 1 3 Readout System s rasisti wea he uea a teenies 2 3 2 1 4 Active Area Geometry and Spatial Resolution aeea 2 3 2 1 5 Counting Rates Linearity and Dynamic Range 00 00e0e 2 4 2 1 6 Vibration and Radiation Tolerance llis eere 2 4 247 sBeferences ai cos veut Sed eR oh ed ae og oe Pad Labor ies 2 4 2 2 VANTEC 2000 Technical Specifications 00ceee eee eeeeeeeaeeee 2 5 2 3 The Detector Unit oari etre ad ee eee te ee ee ee ee ede 2 7 2 3 4 Detector Cables and Connectors s sses llis 2 7 2 4 The Detector Controller 0 0c cece nnn nnn 2 8 3 Basic OST ATION c uocem SCR OR hi Saw oe DX e e e Rn SS Qo Rc S wa 3 1 M88 E01105 iii Table of Contents VANTEC
8. Fiducial plate image missing center spot after correction 2 Measure the reference central point position as in Section 4 3 3 and verify that it is located at the desired coordinates 1023 1023 2 pixels c Project File Edit Collect Process Analyze Peaks Special User Help p New Frame Real time display 03 17 06 16 18 42 Created 03 17 06 Mag Quad 0 Omega 40 000 width 0 250 Counts 251800 Time s 30 000 Distance 20 000 Size 2048 X pixel 1023 Y pixel 1024 Mag 8 2Theta Omega Phi Chi Shutter Distance FloodFld Spatial 2048x2048 Figure 4 13 Zoomed in view of the missing spot after correction 4 10 M88 E01105 VANTEC 2000 User Manual Calibration 3 Remove the fiducial plate 4 Collect again to verify that the flood field image is in the center of the display 3 GADDS General Area Detector Diffraction System V4 1 23 Copyr 1997 2006 Bruker ProJect File Edit Collect Process Analyze Peaks Special User Help New Frame Real time display 03 17 06 16 25 40 Created 03 17 06 Mag Quad 0 Omega 40 000 Width 0 250 Counts 4052507 Time s 30 000 Distance 20 000 Size 2048 Req Sec 30 0 Seconds 30 2Theta Omega Phi chi Shutter Distance FloodF ld Spatial 2048x2048 Figure 4 14 Centered image NOTE The Brukerlnstrument ini file saves all of the setup parameters calibrated above There is no need to repeat the Time Constant calibratio
9. Maximum 1 6 Mcps Linear part 1096 deviation from linearity 0 9 Mcps Local Counting Rate Maximum per a point like reflection 250 kcps Linear part 1096 deviation from linearity 160 kcps Background 5 cps per whole area Maximum Dynamic Range 10 x sqrt collection time in seconds Radiation Hardness 10 X ray photons mm 101 photons in total Accidental Irradiation Intensity No limits Expected Re gassing Period 5 years Table 2 1 Detector specifications M88 E01105 Introduction and System Description VANTEC 2000 User Manual Electrical Specifications Voltage of power supply 100 240 V AC Frequency of power supply 50 60 Hz Power rating 120 W Length of cables between the detector and the controller chassis unit Tee Team Table 2 2 Electrical specifications Environmental Specifications Ambient temperature 41 104 F 5 40 C Operating temperature 57 93 F 14 34 C Maximum temperature gradient 0 9 F 0 5 C per hour Max 80 non condensing for temperatures Relative humidity up to 88 F 31 C decreasing linearly to 50 at 104 F 40 C Location of use Indoor Altitude Up to 1 2 miles 2000 m Mains supply voltage fluctuations Up to 10 of the nominal voltage Overvoltage category IEC 664 II Pollution degree 2 Table 2 3 Environmental specifications 2 6 M88 E01105 VANTEC 2000 Use
10. detectors A more practical value is the maximum counting rate for a point like reflection or a narrow direct beam Measurements with the VANTEC 2000 have shown a maximum counting rate of 250 kcps linear up to 160 kcps The potential global counting rate is also high However in the case of the VANTEC 2000 the global counting rate is limited by the delay line readout We observe 1 6 Mcps as the maximum value linear up to 0 9 Mcps The maximum dynamic range determined as the ratio of the maximum counting rate per reflection to the background fluctuations in the area occupied by the reflection is also very high due to the high local counting rate We estimate the maximum dynamic range to be 10 multiplied by the square root of the collection time in seconds The background counting rate is determined by cosmic rays and the material s natural radioactivity Typically it is less than 5 cps uniformly distributed over the whole detector area 2 1 6 Vibration and Radiation Tolerance The V NTEC 2000 s design is robust There are no shaky parts like thin wires inside so the detector is vibration tolerant compared to multi wire chamber detectors However the detector s most important quality is its radiation hardness unprecedented among detectors with gas multiplication We have noticed no damage up to a cumulative irradiation of 2 x 101 counts per mm corresponding to a total acceptable irradiation of more than 1018 X ray photons for the
11. r These values will vary Stop 8000 v Step 25 v Time 10 Sec Start Abort Disconnect Refresh Save INI Load Help RC board FPGA version 1 0 2D PXC Connected 2006 0 ct 23 Mon 15 57 27 Figure 4 4 HV scan initial parameters 3 Click Start to collect the Counting Rate vs voltage data 4 Examine the bell curve formed by the data If you cannot see the whole plot you can abort the scan with the Abort button change the start and stop voltages and click Start again In this example there is a flat area from approximately 7600V up to 7850V so the working multiplication voltage for the detector will be the middle of the flat area 7675V MB88 E01105 4 3 Calibration VANTEC 2000 User Manual NOTE If the flat area of the Counting Rate vs voltage graph is wider than 150 volts choose the multiplication voltage as the beginning of the flat area 75 volts NOTE In situations where the detector is being calibrated after a cold start up i e powering up the detector after more than 6 hours of inactivity it is necessary to perform the HV scan three times over the course of an hour Use the third of the three results for the multiplication voltage z PXCConfig 2 0 2 1 16 Oct 2006 RC board TDC board HV scan HY scan M3 Dit oo v 14000007 em a gt We define the Stat 7500 v roo0000f se feet PeeebBebebehel plat
12. strong electric field creates electron avalanches in the close vicinity of a grid of thin wires Although multi wire chambers are well developed and fairly stable they have two important limitations They limit the local counting rate capability because of the ion volume charge created near the wires and e The pitch of the wires limits the detector s spatial resolution The VANTEC 2000 s parallel plate geometry greatly reduces these limitations In parallel plate geometry the electrons multiply all the way from the cathode to the anode in the case of the VANTEC 2000 the cathode is a small cell grid that is transparent to the electrons coming from the conversion gap 2 2 MB88 E01105 VANTEC 2000 User Manual Introduction and System Description 2 1 2 Eliminating Sparking Despite its advantages in electron multiplication parallel plate geometry has the well known problem of sparking Bruker AXS has overcome this problem in the following ways e The VANTEC 2000 is designed for X ray diffraction applications in which the radiation is monochro matic and there are no highly ionizing particles that are the primary cause for the sparks excluding the rare cases of cosmic rays and natural radioactivity e The V NTEC 2000 uses a resistive anode with readout strips separated from the anode by a thick 3 mm ceramic substrate e The V NTEC 2000 uses a carefully selected quencher that allows for stable operation with th
13. E Check that registers 07 and 08 both begin with the number 1 If the registers do not both begin with 1 simply replace the first digit with 1 and click Update to update the registers 4 Click Calculate PXCConfig uses the raw data to calculate optimal calibration time constants and updates the registers in the Calibrated Values area z PXCConfig 2 0 2 1 16 0ct 2006 RCboard TDC board HV scan p Current status MINI settings p Calibrated values F1 config load Speed Slow v Reg01 Configuration Resolution 0 01500 Reg04 Averaging time window criteria FI7B TDC constants hex al r TDC constants hy Reg05 XIXr delay compensation 10E0D8 Reg04 F17B Reg04 0000F17B Reg06 YIYr delay compensation E Reg05 10E0D8 Reg05 00100007 Reg07 X event TWindow Scale Delay line time 100217FF Reg06 E Reg06 0000000E Reg08 Y event twindow scale delay line time 100217FF Reg07 100217FF Reg07 190217FF Reg13 F1 flags status Reg08 100217FF Reg08 160217FF Regl4 FDC parameters Regl amp FFFFFFF2 Reg23 i i Reg23 ccoo Regl6 Spark suppression BFFFFFF2 e923 p Reg19 Statistic signal counter 19195 Reference point coordinate x 1023 Reg23 Dither amount and fractional scale ccoo x 1023 15 Reg24 Movie frame exposition 0 5 ae NE 1023 Reg25 Move configuration 0 IV 0 0 is LL carai Reg26 Continuous scan configuration 0 E NER Get raw data m Righ
14. High voltage enabled Temp 455 E f HV n2 cur Strip Anode Drift 152184 HY 0 7 cur 7972 9 Hy 1 3 cur Reserved RP Disconnect Refresh Save INI Load RC board FPGA version 1 0 2D PXC Connected 2006 0ct 23 Mon 16 37 20 Figure 4 6 Update the multiplication voltage 6 Click Load 7 Click Save INI 8 Close PXCConfig NOTE IMPORTANT After you are finished with the detector configuration with PXCConfig verify that the same brukerinstrument ini file is located in both C saxi gaddsnew and C Program Files BrukerAXS BCP and BIS The two files need to be exactly the same so that both GADDS and PILOT can access the same file simply copy the whole file to the GADDS folder M88 E01105 Calibration VANTEC 2000 User Manual 4 3 Set the Detector Center in PXCConfig The idea is to shift the whole image by choosing any reference point on the image in this example we use the central point of the fiducial plate and then moving the reference point to the desired position by using the reference point s current coordinates to recalculate the detectors TDC constants 4 3 1 Find and Cover the Center Hole in the Fiducial Plate If you don t mark the center of the fiducial plate before doing the spatial you will have to count the spots on the screen to find the one at the center It is quicker to mark the center hole with a piece of lead tape for this add NOTE The plate is 29 h
15. ars defective contact Bruker AXS Service for replacement by qualified service personnel 4 With the access panel removed firmly grasp the power cord of the detector controller at the strain relief and pull the cord from the controller 5 The power cord is connected to X601 on the left side of the D8 enclosure Pull the plug from this outlet strip 3 5 Lock Out 1 Use the key located on the left side column of the D8 enclosure to lock and unlock the system During normal operation the key must be switched to the unlocked position In the unlocked position power may be applied with the ON button located on the right hand column of the D8 enclosure In the locked position no power will be available for the control electronics generator or X602 connectors The key can only be removed in the locked position Power will still be present at the X601 connectors Electric shock can result if proper safety precautions are not observed 3 4 MB88 E01105 4 Calibration 4 1 Calibrate the Time Constants 1 Use D8Tools to irradiate the detector as you would in a flood field setup For calibration we want 100 000 to 200 000 counts second uniformly distributed across the face of the detector The ideal setting is 150 000 counts second NOTE It is acceptable with Cu radiation to use an open collimator with roughly 4OkV 10mA and Fe foil at 45 Do not use a direct beam 2 n PXCConfig select the TDC Board tab z PXCConfi
16. atory equipment and dust containment and collection apparatus Disposal of parts containing beryllium must comply with all applicable local and national regulations MB88 E01105 1 3 About This User Manual VANTEC 2000 User Manual 1 3 4 X ray Safety X ray equipment produces potentially harmful radiation and can be dangerous to anyone in the equipment s vicinity unless safety precautions are completely understood and implemented All persons designated to operate or perform maintenance on this instrument need to be fully trained on the nature of radiation X ray generating equipment and radiation safety All users of the X ray equipment are required to accurately monitor their exposure to X rays by proper use of X ray dosimeters For safety issues related to operation and maintenance of your particular X ray generator diffractometer and shield enclosure please refer to the manufacturer s operation manuals or to your Radiation Safety Officer The user is responsible for compliance with local safety regulations 1 3 5 Proper Lifting Installation of the detector requires lifting of components that weigh up to 43 Ibs 19 5 kg Whenever possible two or more people should lift objects together Use proper lifting techniques at all times Use the following steps as an overview of proper lifting techniques e Plan practice the lift While lifting bend at the knees keep your back straight tighten your stomach and lift with yo
17. blication gt Table 1 3 Referenced documentation 1 2 MB88 E01105 VANTEC 2000 User Manual About This User Manual 1 3 Safety Considerations 1 3 1 Qualified Personnel The V NTEC 2000 may only be set up and operated in conjunction with this User Manual Only personnel authorized by Bruker AXS are allowed to work on this equipment All repairs adjustments and alignments performed on any components of the V NTEC 2000 must be carried out strictly in accordance with the established safety practices and standards of the country where the equipment is installed 1 3 2 Correct Usage This device and its components may only be used for the applications described in this User Manual and only in connection with devices or components from other manufacturers which have been approved or recommended by Bruker AXS This product can only function correctly and safely if it is transported stored set up and installed correctly and operated and maintained as recommended by Bruker AXS Protection provided by this equipment may be impaired if it is used in a manner not specified by Bruker AXS 1 3 3 Hazardous Materials A WARNING The VANTEC 2000 s optic assembly contains a beryllium window Beryllium is potentially hazardous if ingested inhaled or absorbed through the skin Take care to avoid contact with the VANTEC 2000 X ray window Never drill grind or sand beryllium unless you are a qualified individual using appropriate respir
18. ducial plate on the face of the detector aligned with the pins on the detector face and secure it with screws 7 Collect again as in step 4 of this Section to see the array of spots s Project File Edit Collect Process Analyze Peaks Special User Help New Frame I E e s AJ oe Real time display ee ee ee ee ee ee a soe ee ey 03 17 06 16 06 38 4 P Created 03 17 06 Mag Quad Omega width Counts Time s Distance EE D Size Req Sec Seconds a oe en Uf E 2Theta Omega Phi E B Li Chi TT TE Shutter Distance FloodF ld TEET i Spatial 2048x2048 Figure 4 9 Fiducial plate image missing center spot MB88 E01105 4 7 Calibration VANTEC 2000 User Manual 4 3 3 Find Coordinates of Reference Point 1 Zoom into the displayed frame using Edit gt Zoom Click the 4x button 2 Find the coordinates of the central point by placing the pixel cursor Analyze gt Cursors gt Pixel or the F7 key along a line with the rows and columns of other spots and reading the X pixel and Y pixel values Record the coordinates of the central point in Figure 4 10 they are X 1046 Y 1036 U GADDS General Area Detector Diffraction System V4 1 23 Copyr 1997 2006 Bruker Edit Collect Process Analyze Peaks Special User Help New Frame Real time display 03 17 06 16 06 38 Created 03 17 06 Mag Quad 0 Omega 40 000 Width 0 250 Counts 210359 Time s 30 000 Distance 20 000 size
19. e gas gain as large as 10 without the usual polymerization and gas composition variations associ ated with irradiation and electron multiplication 2 1 3 Readout System The readout strips are arranged in two parallel planes with one plane s strips running in the X direction and the other plane s strips running in the Y direction The induced charge is divided approximately evenly between the planes by adjusting both the gap between the planes and the individual strip widths There are five signal outputs from the detector in total Each plane s readout strips are connected to a corresponding delay line and each delay line has two amplifiers connected to its ends In addition a common signal from the grid is going out of the detector These five outputs feed the constant fraction discriminators in the detector controller The time to digital TDC board located in the computer measures the time intervals between the opposite outputs of each of the delay lines and converts them into X and Y coordinates The TDC also checks the time relationships between all five signals and validates the events The coordinates are registered in the 2048 by 2048 histogram memory with an average pixel size of 68 um by 68 um There are two histogram memories in the TDC board They operate in alternating fashion with one being filled while the other transfers data to the computer memory A time resolving data collection with an event time resolution of one micr
20. eau as Stop 99 y A beginning at 95 of y poe the curve s nol eiie ue maximum B Y E zu m D ic mum fieiebebeiebebeiebeiebedeieie um The plateau may be uL ie A tc i hala between 100 000 po a ae and 200 000 Pm 7600 7700 7800 7900 8000 Clear counts sec the soot ideal value is 150 000 counts sec Refresh Save INI Help Exit IRC board FPGA version 1 0 2D_PXC Connected 2006 Oct 23 Mon 16 04 07 Figure 4 5 Counting rate vs voltage plot 4 4 MB88 E01105 VANTEC 2000 User Manual Calibration 5 Switch to the RC board tab and update the multiplication voltage if necessary z PXCConfig 2 0 2 1 16 Oct 2006 RC board TDC board HV scan r Discriminator thresholds XL low XL high XR low XR high YL low YL high YR low YR high G low G high ADC Current Requested sm 5000 y rs 535 gy foo o0 mv sm 5000 gy Fimo 535 ay reo 9999 uy Units are tenths of millivolts Drift m Detector high voltage s 4 Current Requested 8000 8000 y Multiplication 7675 7725 V Units are volts Digital AAAA NA outputs Current Requested CFD discriminator high threshold disable Spark suppression disable CFD dead time fixed CFD dead time enable Cooling unit enable b e Alam System ready High voltage ready Low voltage ready
21. g 2 0 1 9 30 Jun 2006 RC board TDC board HV scan Current status INI settings Calibrated values F1 config load Speed Resolution X TDC constants hex TDC constants hex Reg04 iri Reg04 Reg06 Lr delay compensation Reg05 awar Reg05 Reg07 X event TWindow Scale Delay line time 1000000 Reg06 a Reg06 Reg08 Y event twindow scale delay line time 1000000 Reg07 Reg07 Reg13 F1 flags status Reg08 Eom Reg08 Regl4 FDC parameters Regl6 0 Reg23 Reg16 Spark suppression 4000000 Reg23 Rieg13 Statistic signal counter Reg01 Configuration Reg04 Averaging time window criteria Reg05 XIXr delay compensation Reef point required coordinate Reference point coordinate x 1023 Xx 1023 Y 102 Y 1023 0 0 is Lt Get raw data Right Left Twindow Calculate x 0 Y 0 Update Reg23 Dither amount and fractional scale Reg24 Movie frame exposition Reg25 Movie configuration Reg26 Continuous scan configuration Reg27 Ref grid stat counter p om 5 T 719005006 16000006 M aooaa rum remo 7 1 Tt i Reg28 No register expected Disconnect Refresh Save INI Load Help PXC GPX TDC FPGAIDate 07SEP2006IVersion 02 02 AVICopyright 2006 Bruker AXS Inc Connected 2006 Oct 16 Mon 11 01 31 Figure 4 1 TDC board tab M88 E01105 4 1 Calibration VANTEC 2000 User Manual 3 With the shutter open click Get raw data The system collects uncal
22. g06 20032475 Regl5 Save INI Load PXC TDC FPGAIDate OSMAR 2005fVersion 01 02 ANICopyright 2004 Bruker AXS Inc Eonnected gone ar 17 Fri 16 12 14 v Figure 4 11 Reference point measured and required coordinates Click Get raw data Click Calculate Click Update Click Load Click Save INI o oN o0 FPF Qo r TDC constants hex 7 Ref point required coordinate m Calibrated values 1023 1023 Calculate Update Set the reference point coordinates to X 1023 Y 1023 Click Disconnect After disconnecting you will be able to run GADDS Enter the reference point coordinates you measured here Make sure that the 0 0 is LL checkbox is checked Make sure that the Ref point required coordinates are X 1023 Y 1023 M88 E01105 Calibration VANTEC 2000 User Manual 4 3 5 Use GADDS to Verify Correction to Center 1 To check the corrected position start GADDS again and repeat Section 4 3 2 When you are done you will have the image in Figure 4 12 s z Project File Edit Collect Process Analyze Peaks Special User Help New Frame Real time display 03 17 06 16 18 42 Created 03 17 06 Mag Quad Omega width Counts Time s Distance size Req Sec Seconds 2Theta Omega Phi Chi Shutter CLOSED Distance 20 000 FloodF ld LINEAR Spatial 6 03 14 2048x2048 PXC a wo ode A de ee ee ee ee Figure 4 12
23. ibrated data for a short time After a few seconds the TWindow parameters will be updated z PXCConfig 2 0 2 1 16 Oct 2006 RC board TDC board HV scan r Current status INI settings r Calibrated values F1 config load Speed Slow Reg01 Configuration m Resolution 00500 v Reg04 Averaging time window criteria Fie m TDC constants hex 1 r TDC constants hex Reg05 XIXr delay compensation 10008 FI7B ea Reg06 YIYr delay compensation ne 10E0D8 Beg Rieg07 X event TWindow Scale Delay line time 100217FF EZ Reg06 Reg08 Y event twindow scale delay line time 100217FF Reg07 Reg13 F1 flags status 100217FF Reg08 Regl4 FDC parameters E Regl amp TTFFFFF2 Reg23 Reg16 Spark suppression BFFFFFF2 Lies am Ref point required coordinate Reg19 Statistic signal counter 185 Reference point coordinate z 13 Reg23 pira amount and fractional scale ccoo x s y ia Reg24 Movie frame exposition a 15 L Reg25 Movie configuration La IV 0 0 is LL Reg26 Continuous scan configuration v Reg27 Ref grid stat counter 9 Calculate Reg28 No register expected v UE pdate Disconnect Save INI Load Help Exit xc GPX TDC FPGAIDate 0BSEP200BfVersion 02 02 ARICopyright 2006 Bruker AXS Inc Ponnected 2006 Oct 23 Mon 15 05 40 i Refresh Figure 4 2 TWindow values updated NOT
24. n or reset the detector center as long as no changes are made to the detector hardware controller TDC board or cables The high voltage calibration needs to be checked periodically about every two weeks for a new installation MB88 E01105 4 11 Calibration VANTEC 2000 User Manual 4 4 Spatial Correction Calibration The spatial calibration must be updated every time the sample detector distance is changed However it is possible to collect several spatial calibration files at different distances and then use them as needed The spatial correction requires 1 5 million counts 1 Put the fiducial plate on the detector 2 Drive the detector to the appropriate position for taking a spatial 3 Determine how long it will take the detector to accumulate 1 5 million counts by adding and looking at the total counts value 4 n GADDS select Process gt Spatial gt New and use the time value you found 4 5 Flood Field Correction Calibration The flood field calibration must be updated every time the sample detector distance is changed However it is possible to collect several flood field calibration files at different distances and then use them as needed A flood field correction done in the field should be 100 million counts for bench testing and basic functionality tests For real world use we recommend using a flood field of 400 million counts 4 5 1 Examine Image for Defects 1 Perform a 100 second add just to
25. ntroller to switch off the power Wait 60 seconds after turning off HV power before removing the HV connectors 3 Press the Power OFF button O on the D8 enclosure s right hand column to stop power to the control electronics high voltage generator and the VANTEC 2000 controller when the controllers are connected to X602 4 Before switching off the diffraction system reduce the high voltage and current of the generator to the lowest values e g 20 kV 5 mA using the control software e g XRD COMMANDER 5 Turn off the high voltage generator by turning the rotary switch High Voltage to the left side The X RAY ON displays will turn off 6 Switch off the instrument by pressing the enclosure s Power OFF button Failure to reduce the generator high voltage and current prior to shutting off the D8 could significantly reduce the lifetime of the X ray tube and the high voltage generator 3 2 MB88 E01105 VANTEC 2000 User Manual Basic Operation 3 3 Emergency Power Down Procedure The main power for the VANTEC 2000 controller is connected to X601 located on the left side of the D8 lower enclosure 1 Inthe event of an emergency press either Stop button located on the enclosure s front side columns to switch off power to the control electronics high voltage generator and the VANTEC 2000 controller when the controllers are connected to X602 Use the Stop button to immediately shut off power to the X ray source and
26. oles by 29 holes Put a small piece of lead tape over the center hole so that there are 14 open holes in any direction from the center 4 3 2 Image the Fiducial Plate in GADDS 1 Setup the system with a fluorescing foil 2 theta 45 and DX 15 cm 2 Start GADDS by selecting Start gt Programs gt Bruker AXS gt gadds GADDS automatically connects to the goniometer controller 3 Select Edit gt Configure gt User Settings Under Detector set the Framesize to 2048x2048 4 Select Collect gt Add and set the parameters as in Figure 4 7 Options for Collect Add Maximum seconds 30 v Iv Pre clear Test pattern Maximum counts 10000000 Max display counts 7 v iv Realtime display Reset interval 0 i Iv Open amp close shutter Use Attenuator ET Figure 4 7 Add parameters 4 6 M88 E01105 VANTEC 2000 User Manual Calibration 5 Click OK to collect for 30 seconds If the detector is functioning properly your image will look like Figure 4 8 note that in Figure 4 8 the overall image is displaced to the right e 997 2006 Bruker olk Project File Edit Collect Process Analyze Peaks Special User Help New Frame Data just collected 03 17 06 16 02 43 Created 03 17 06 Mag Quad 1 Omega width Counts Time s Distance Size Req Sec Seconds 2Theta Shutter Distance FloodF ld Spatial 2048x2048 Figure 4 8 Verify image without fiducial plate 6 Put the fi
27. on VANTEC 2000 User Manual 4 14 M88 E01105 5 Preventive Maintenance The components of the VANTEG 2000 are maintenance free for the user However Bruker AXS recommends a yearly preventive maintenance inspection To schedule this inspection or for technical support contact your local Bruker AXS Service Department for the U S A call 1 800 234 XRAY 9729 5 1 Cleaning the Diffraction System and Measuring Equipment Before cleaning the equipment turn off power to the complete diffraction system i e all control electronics accessory components and the high voltage generator A WARNING Do not touch the front window of the X ray detector and the X ray tube as they contain beryllium Beryllium is potentially hazardous if ingested inhaled or absorbed through the skin Take care to avoid contact with the VANTEC 2000 s X ray window Never drill grind or sand beryllium unless you are a qualified individual using appropriate respiratory equipment and dust containment and collection apparatus Disposal of parts containing beryllium must comply with all applicable national regulations To clean the interior of the enclosure and exterior of the detector components use dry cleaning utensils only Do not use water or aggressive cleaning agents Clean laboratory conditions are recommended Airflow is critical for maintaining proper operation of the detector control electronics Do not place anything on the controllers that ma
28. osecond is possible that allows registration of very fast changes within the sample during the measurements 2 1 4 Active Area Geometry and Spatial Resolution The sizes of the Be window the grid the anode and the readout electrodes have some margins to provide the detectors active area size to be 14 cm by 14 cm The window has a spherical shape with a radius of 20 cm to reduce the parallax effect The continuous nature of the anode does not limit the spatial resolution of the V NTEC 2000 unlike the discrete wire spacings in multi wire chamber detectors The main internal processes that affect the spatial resolution are e the range of the initial conversion electron and e diffusion of the electron cloud while it drifts to the grid However for the V NTEC 2000 at two atmospheres of pressure these limitations are smaller than the contribution of electronic noise in the signal amplifiers The resulting width of the spread function from a point like beam is 250 microns at the detector center and 320 microns at the periphery due to the parallax effect M88 E01105 2 3 Introduction and System Description VANTEC 2000 User Manual 2 1 5 Counting Rates Linearity and Dynamic Range The main advantage of the parallel plate design is its high local counting rate We have observed linear behavior up to 500 kcps mm corresponding to 2400 cps pixel which is several orders of magnitude higher than that achievable with multi wire chamber
29. r Manual Introduction and System Description 2 3 The Detector Unit The detector unit consists of a pressure vessel at 2 atmospheres with a back cover see Figure 2 1 The VANTEC 2000 is a single photon counting detector which converts the X ray photons to electrical signals The signals are amplified by five amplifiers attached to the detector The high voltage filters and preamps are mounted into the back cover of the detector 2 3 1 Detector Cables and Connectors Eleven cables are delivered with the detector e Power cable e Serial cable e Five 15 ft 5 m preamp cables Ch 1 Ch 2 Ch 5 e Low voltage detector cable e Two high voltage power cables e SCSI interconnection cable The detector unit s back cover has eight cable connectors Figure 2 3 e One connector for the preamplifiers low voltage power supply e Two cables for the detector s high voltage supply e Five signal outputs for the preamplifiers High voltage cables permanently attached Low voltage power supply Channel 4 Channel 2 Channel 5 Channel 1 Channel 3 Figure 2 83 Detector unit rear MB88 E01105 2 7 Introduction and System Description VANTEC 2000 User Manual 2 4 The Detector Controller Fan filters Illuminated high voltage enable push button switch LED Indicators Alarm Red Illuminated power System activity Green switch blinking HV OK Yellow LV OK Green Figure 2 4 Detector controller f
30. ring Equipment 5 1 5 2 Replacing Fuses vc ENIESIT e EG ue a eee 5 2 Index cesi He ee Gon eek eRe ewe Uri a tese Cat mbar Index 1 iv M88 E01105 1 About This User Manual 1 1 Terms and Conventions Used in this User Manual Before using this User Manual it is important to understand the terms and typographical conventions used Certain kinds of formatting in the User Manual s text are used to identify special kinds of information 1 1 1 Typographical Conventions Table 1 1 shows typographical conventions used to help you quickly locate and identify information in this User Manual Convention Usage Software interface elements such as icons menu items and but ldf boldrace tons to be selected as part of the current procedure italics New terms and words requiring emphasis monospace Information read from or entered into a command prompt Navigation through a hierarchical menu For example Choose gt Start gt Programs gt Bruker AXS gt PILOT describes navigating Windows menus from Start to Programs to Bruker AXS to PILOT square brackets Keyboard input Table 1 1 Typographical conventions Greek and Roman Text This User Manual uses scientific terminology that may be rendered in Greek text However this User Manual follows a convention of using Roman text to the greatest extent possible 20 2 theta 64 theta 05 theta2 o omega phi X chi
31. ront Channels 1 5 Low voltage connectio Power receptacle TDC connection Figure 2 5 Detector controller rear 2 8 M88 E01105 3 Basic Operation This Section covers the power up power down and basic operation procedures for the VANTEC 2000 detector 3 1 VANTEC 2000 Power Up Procedure 1 Press the I O button on the front of the VANTEC 2000 controller The I O button illuminates when power is present If the I O button doesn t illuminate ensure that there is power applied to the D8 system by pressing the Power ON button located on the right side column of the D8 enclosure 2 Turn on the high voltage for the detector by pressing the high voltage enable button on the front of the VANTEC 2000 controller If power and communications for the controller are properly applied there should be no warning LED illuminated The system LED will flash indicating communication and control The high voltage LED will be yellow and illuminated The low voltage LED will be green and illuminated NOTE The VANTEC 2000 controller requires 15 minutes to warm up for optimal results M88 E01105 3 Basic Operation VANTEC 2000 User Manual 3 2 VANTEC 2000 Power Down Procedure 1 Press the high voltage enable button on the front of the V NTEC 2000 controller If the high voltage button is not illuminated this indicates that high voltage for the detector is OFF 2 Press the I O button on the front of the V NTEC 2000 co
32. see whether there are any defects in the image NOTE If you see any dark spots on the image you can burn them off by placing an Fe55 source directly over the spot on the detector where you saw the cold spot let it sit for about an hour 2 When the flood field correction is done a Click to display self corrected image window appears Click OK 3 A Click to unwarp self corrected image window appears Click OK GADDS displays the data collected for the flood field with the flood field and spatial applied 4 Examine the image for asymmetry or intensity problems 4 12 M88 E01105 VANTEC 2000 User Manual Calibration 4 6 Re Optimize the High Voltage for Your System s Radiation In Section 4 2 we set the optimum high voltage for calibration using radiation from a fluorescing foil At this high voltage setting the detector will not be optimally sensitive to the radiation used in actual experimental situations 1 Remove the fluorescing foil from the system and replace it with a sample that is expected to diffract well in the case of Cu radiation we recommend using corundum 2 Drive the goniometer such that the detector is out of the way of the direct beam but scattering and diffraction from the sample will be visible to the detector 3 Using D8Tools open the shutter 4 Perform all of the steps in Section 4 2 to optimize the detector for use with your system s radiation M88 E01105 4 13 Calibrati
33. stop all moving drives instantly The Stop button should only be used in emergency situations and not for normal shutdown of the diffractometer system The Stop button will not turn off the three AC outlets X601 that are located on the mains distribution panel Devices connected to these AC outlets can only be switched off by the internal automatic circuit breaker labelled F600 or the external power switch that is installed on the user s side close to the diffractometer The control panels of the D8 diffraction system are located on the front side of the system X602 is supplied power as long as the D8 On Off switch on the right hand column of the D8 cabinet is enabled and the two emergency Stop switches are not engaged 2 To disengage the Stop button turn the button clockwise and release Re apply power with the Power On button that is on the right side column of the D8 enclosure M88 E01105 3 3 Basic Operation VANTEC 2000 User Manual 3 4 Disconnecting the Power Plug To remove relocate or service the detector controller it may be necessary to disconnect the power cable from the rear of the controller 1 Ensure that all power is off to the enclosure prior to removing the power cord 2 Remove the rear access panel of the D8 enclosure Use caution when removing the panel as the ventilation fans are connected to it 3 Visually inspect the power cord for frayed or exposed wiring prior to removal If the power cord appe
34. supply A WARNING Wait 60 seconds after turning off HV power before removing HV connectors A WARNING The X ray window contains Beryllium Any activity that scratches the window surface can generate airborne beryllium dust which can cause lung disease if inhaled Beryllium metal in solid form and as contained in this product presents no special health risks For additional information reference MSDS The rating plate is also displayed on the detector Model 672 100 240 VAC 50 60 Hz 120 W Fuse Rating F 3 15 A 250 V M88 E01105 1 5 About This User Manual VANTEC 2000 User Manual 1 4 Service and Technical Support for the VANTEC 2000 Area Detector The VANTEC 2000 area detector is a precision instrument and contains no user serviceable parts If you suspect a detector malfunction contact Bruker AXS Technical Support 1 4 1 Technical Support Users are invited to contact Bruker AXS whenever there are problems or questions related to the system Before contacting Bruker AXS please e If there is a software problem determine the version of the program e Record any error messages e Determine conditions and steps that recreate the problem If the instrument is in North America contact our North American Service Center Bruker AXS North American Service Center Bruker AXS Inc Customer Support Address 5465 East Cheryl Parkway Madison WI 53711 5373 USA Toll free telephone 1 800
35. t Left y Twindow Reg27 Ref grid stat counter 0 E E Rieg28 No register expected 0 x m Ns Update Connect Disconnect Refresh Save INI Load Help Exit prc GPX TDC FPGAIDate 0BSEP2U0BfVersion 02 02 amp RICopyright 2006 Bruker amp XS Inc Connected 2006 0ct 23 Mon 15 06 04 Figure 4 3 Calibrated values updated 5 Click Update Calibrated values are copied to the TDC constants and PXCConfig updates the values in the INI Settings area 6 Click Load The registers under Current Status are updated MB88 E01105 VANTEC 2000 User Manual Calibration 7 Click Save INI A Created new brukerinstrument ini window appears NOTE It is necessary to click Load after Update every time Otherwise the next calibration if repeated will give an incorrect result 4 2 Calibrate the High Voltage The optimal value of the multiplication voltage depends on the radiation s wavelength and on the intensity when the global count rate exceeds 500 kcps 1 In PXCConfig select the HV scan tab 2 Setup the scan parameters according to Figure 4 4 This is a scan through a wide range of voltage values to help you isolate the optimum range for your detector the default start and stop voltages are set by PXCconfig as the multiplication voltage 200V z PXCConfig 2 0 2 1 16 0ct 2006 RC board TDCboard HY scan r HY scan Drift 8000 Y Multi Stat 7500 y
36. tatus registers D Detector Center Detector Controller LED Indicators warm up time 4 9 4 3 2 1 2 3 2 6 4 2 4 6 2 8 3 1 Detector overview direct beam Documentation Conventions Notes dynamic range E electron avalanches Electron Multiplication Emergency Power down Procedure F Fans on controller Fiducial Plate center hole Flood Field Correction Fuses replacing G GADDS gas gain Get raw data button global counting rate H Help high voltage turning on High Voltage calibration high voltage LED humidity HV connectors wait before removing HV scan parameters HV scan tab HV scan with cold startup 2 2 2 2 3 3 4 5 2 3 4 2 2 4 1 6 4 3 3 1 2 6 1 5 4 3 4 3 M88 E01105 Index 1 Index VANTEC 2000 User Manual Reference Point 4 8 irradiati idental Intamst 2 4 in PXCConfig 4 9 adiago Kocrvaentalamodntens ver Re optimizing after calibration 4 13 x S k itch 3 4 ES Safety 1 3 Safety Issues L proper lifting 1 4 LED Indicators on controller 2 8 Safety issues 1 4 lifting techniques 1 4 Save INI button 4 3 linearity 2 4 Service 1 6 Load button 4 2 Sparking l 2 3 Lock Out 3 4 Spatial Correction 4 12 low voltage LED 3 1 spatial resolution 2 2 Low voltage connection 2 8 Specifications 2 5 spread function 2 3 system LED 3 1 M Mains supply voltage fluctuations 2 6 T Mikrogap 2 1 multiplication voltage 4 3 TDC board 2 3 multi wire chambers 2 2 TDC Board tab
37. tted or reproduced in any way including but not limited to photocopy photography magnetic or other record without prior written permission of Bruker AXS Inc Address comments to Technical Publications Department Bruker AXS Inc 5465 East Cheryl Parkway Madison Wisconsin 53711 5373 USA All trademarks and registered trademarks are the sole property of their respective owners Printed in the U S A Revision History Revision Date Changes 0 03 November 2006 Initial release 1 22 May 2007 Corrections and additions to Calibration section Bruker BioSciences Bruker AXS Inc 40 Manning Road 5465 East Cheryl Parkway INAI Billerica MA USA Madison WI 53711 5373 USA ane ANAB INTERNATIONAL Phone 1 978 663 3660 Phone 1 800 234 XRAY 9729 i T Fax 1 978 667 5993 Fax 1 608 276 3006 An ISO 9001 2000 Registered Company E mail info brukerbiosciences com E mail info brukeraxs com www brukerbiosciences com www brukeraxs com Table of Contents 1 About This User Manual 2 220 icicewc cece ewe eee sere ee eee ees 1 1 1 1 Terms and Conventions Used in this User Manual 20000eeee eee 1 1 1 1 4 Typographical Conventions 0 000 cece 1 1 1 1 2 Warnings Cautions and Notes 0 0 00 ccc ee 1 2 1 2 Referenced Documentation 000 cece eee eee eens 1 2 1 3 Safety Considerations 00 0 eee 1 3 1 3 1 Qualified Personnel 0 0 00 tenet eens 1 3 1 3 2
38. und ratio However the MikroGap technology allows operation at count rates much higher than those typically possible with gas detectors while maintaining all benefits The factory settings are optimized for Cu Ka minimizing background scattering and fluorescence The V NTEC 2000 consists of two parts the detector and the detector controller M88 E01105 2 Introduction and System Description VANTEC 2000 User Manual 2 1 VANTEC 2000 Theory of Operation The VANTEC 2000 is a photon counting X ray area detector The sealed chamber inside the detector is filled with xenon with the addition of a quencher at a pressure of 2 atmospheres The schematic structure of the detector is shown in Figure 2 2 X ray photon Be window Ea e Conversion Drift Gap ee ee ee Grid Amplification Gap L pou ode Induced Readout strips Charge Readout Strips Insulator Figure 2 2 V NTEC 2000 schematic diagram 2 1 1 X ray Photon Conversion and Electron Multiplication An incoming X ray photon penetrates through the Be window into the conversion gap In the conversion gap the photon is converted into a small cloud of electrons The released charge about 4 x 1017 Coulombs for an 8 KeV photon in Xe is too small to be registered by contemporary electronics therefore internal electron multiplication is necessary The most popular way to multiply electrons is with a multi wire chamber in which a
39. ur legs e Position keep your body close to the object you wish to lift your stability increases the closer you are to the object Keep your feet shoulder width apart e Movement avoid making awkward movements while holding a heavy object Get help if the object is too heavy or cumbersome 1 4 M88 E01105 VANTEC 2000 User Manual About This User Manual 1 3 6 Warning Labels The following warning symbols are displayed on the detector Strictly obey all instructions and warning text printed on the labels attached to the various parts of the equipment A WARNING AN Voltage Danger Before installing or servicing the detector switch off the system to avoid exposure to high voltage Inside the V NTEC 2000 voltages up to 17 KV DC occur which are not accessible from the outside High voltages exist inside the detector and in the cables with the label HV connecting the detector unit and the rackmountable controller After turning off the system high voltages are still present They discharge over time Wait a few minutes before removing cables from the controller unit If one of these high voltage components is damaged switch off the system immediately and contact Bruker AXS Technical Support Section 1 4 A WARNING Sometimes complex D8 systems will be supplied by several power supply lines The system and its components will be live until all power lines connected to the system are disconnected from the mains power
40. whole detector Due to the resistive anode and the stable gas mixture the V NTEC 2000 tolerates accidental intensive irradiations In such cases the anode voltage drops in the irradiated part of the detector suppressing the multiplication process The irradiated part or the entire detector is momentarily rendered ineffective but no lasting damage occurs 2 1 7 References D M Khazins B L Becker B B He Y Diawara R D Durst S A Medved V Sedov and T A Thorson A Parallel Plate Resistive Anode Gaseous Detector for X Ray Imaging IEEE Trans Nucl Sci vol 51 pp 943 947 June 2004 R D Durst S N Carney Y Diawara R Shuvalov Readout structure and technique for electron cloud avalanche detectors US Patent No 6 340 819 January 2002 2 4 MB88 E01105 VANTEC 2000 User Manual Introduction and System Description 2 2 VANTEC 2000 Technical Specifications Detector Specifications Sensor Type Xe based gaseous avalanche detector Usable wavelength range From Cr Ka up to Mo Ka factory set default for Cu Ka 2 ATM Xenon based proprietary gas mixture Gas fill no external gas supply required Window type Be Sensor Active Area 14 x 14 cm Window Size 14x 14 cm Number of Pixels 2048 x 2048 Sensor Pixel Size 68 um x 68 um Point Spread Function FWHM 250 um at the sensor center 320 um at the periphery Global Counting Rate
41. y restrict the flow of air Regular cleaning of the detector components includes removal of any airflow restrictions including dust MB88 E01105 5 1 Preventive Maintenance VANTEC 2000 User Manual 5 2 Replacing Fuses 1 Unplug the power cable before replacing the fuse 2 Locate the fuse cover on the rear of the detector controller 3 Carefully remove the fuse from its holder You may need a small screwdriver or needle nose pliers to pry open the fuse cover see VANTEC 2000 NOTE Replace the fuse only with the specified replacement Do not substitute a fuse with a different rating 4 Insert the new fuse into the holder Verify complete seating of the new fuse 5 Replace the fuse cover 6 Replace the power cable If the controller continues to blow fuses or if any function does not work correctly after replacing the fuse contact Bruker AXS Service for repair assistance Discontinue use of the controller if it is not functioning properly Fuse Cover Figure 5 1 Fuse close up 542 MB88 E01105 Index Numerics 0 0 is LL checkbox A Abort button active area active area size Altitude amplifiers and preamplifiers anode background Beryllium health warning Proper disposal warning Bruker AXS Service Department brukerinstrument ini C Cables included cables Calculate button Cautions cleaning cold start up Controller front cosmic rays Counting Rate vs voltage data Current S
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