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specifications-442

1. Only vector magnets 8 1T with field cancellation in He3 stage will be accepted as home made small field coils in horizontal axis are cumbersome in dry systems Appropriate systems like hydraulic lift for mounting and unmounting magnet etc antivibartion stand etc must be provided Must have nitrogen cold pipe to cool magnet fast System magnet must cooldown in lt 36 hrs 10 Additional thermometers and channel scanner to monitor magnet and all stages must be provided 11 If using compresors for initial condesnation compressor must have a by pass 12 Warranty must be 5 years comprehensive including consumables for whole system e g PTR head sevicing compressors for condensing charge UPS etc must be covered Point system for evaluation 6 7 8 9 Wet system with recondenser and all other specs will be awarded upto 50 points Dry system with all criteria including 2 axis magnet will be awarded 40 points Dry system with sample loadlock puck for RF and DC wiring upto 10 points Hold time 10 points one company may quote two ranges of hold times to maximize chance of winning 10 Overall Cost of system 40 points 11 We may reject system with too less points
2. drivers and ASCII programming instruction for supply must be provided Power supply must be low noise to measure sensitive devices like SQUIDS from reputed manufacturer like Oxford instruments or American magnetics etc Quote two supplies or integrated 2 unit supply for 2 axis option separately Remote Helium re liquefier A PTR based re liquefier must be connected to the cryostat via flexible transfer lines and must be able to recondense the vapours and also re circulate the liquid from a small satellite conatiner PTR cannot be mounted on dewar l ios D 9 11 12 PT410 cold head mounted inside re liquefier assembly a PT410 re liquefier approximately 10 Liters day CP289C water cooled compressor package 220 230VAC 3 Phase 50 Hertz Stainless steel flexible lines a 1 2 Aeroquip to 3 4 Aeroquip 1 0 diameter line length 66 FT b 3 4 Aeroquip both ends 1 0 diameter length 66 feet Cold head motor cord length 66 feet Diode cord Cryostat assembly Cryostat with liquid helium drain leg 1 2 or O 3 8 3 8 length 24 Temperature monitor controller Silicon diode temperature sensor Pressure relief valve Vapor line with valve f Heater 50W 50V 500hm Re liquefier stand with stand tool kit Under normal operation cryostat boil of must be lt 100 mL per day or better ono oP System must be connected to Helium recovery line with appropriate over pressure valve
3. An Expression of interest is invited for a He3 cryostat 1 2 3 4 5 Provide quote for all minor experimental accessories like bias tee separately as we can compare prices if any vendor is unable to source them Also quoting in itemized pricing for all items is preferred over blanket quotes for all items as some options may be relaxed for cost Technical committees decision is final in award of points We reserve the right to call for detailed presentations or queries Provide quotes in 2 part system General Helium 3 system with 1 2 3 Part I 300 mK base temp Around 60 hrs hold time Sample space 60 mm dia in IVC tail Around 10 15 cm below He3 stage before approaching magnet amp atleast 10 15 cm between 300mK and 1K plate He 3 insert Item 1 He 3 insert l 2 DN Pa 11 12 13 14 15 16 17 18 Insert top flange including radiation baffles pumping ports and etc G 10 sliding seal tube for easy pull out Seal must have KF 16 connection to blow Helium gas when pulling in or out Indium sealed IVC can Charcoal sorption pump Charcoal sorption pump heater Generic silicon diode or cernox thermometer on charcoal sorption pump with standard calibration Separate Hermetic charcoal sorption pump cooling line so that the He 3 insert will still function at low liquid helium level Charcoal cooling line control valve with flow gauge 1K pot Hermetic 1K pot operating ne
4. edle valve so that the He 3 insert will still function at low liquid helium level quote fixed impedance as additional option for low noise and temperature stability Generic silicon diode or cernox thermometer on 1K pot with standard calibration 1K pot pumping port with pressure relief valve He 3 pot He 3 pot heater Generic RuO2 thermometer RO 600 on He 3 pot with standard calibration Sufficient He 3 gas to meet the guaranteed performance specs 6 NTP liters minimum Stainless steel He 3 gas storage vessel with vacuum pressure compound gauge Three 3 hermetically sealed 25 pin hermetic electrical feedthrough installed on the IVC pumping line labeled as Feedthrough A Feedthrough B and Feedthrough C feed through C respectively 19 20 21 22 23 24 25 26 al 28 29 30 31 Feedthrough A is used for heaters and thermometers If necessary 12 can be used for thermometry from A All wiring twisted pair configurations must correspond to lakeshore AC bridge for 4 wire measurement i e V and V and I amp I must be a twisted pair 25 pin must be for grounding wire 24 x 0 005 diameter insulated manganin wires in 12 x twisted pairs will be installed on feedthrough B C and D Feedthrough C amp D must have twisted pairs based on adjacent numbering in mini D sub i e 1 2 3 4 forming twisted pairs All wires must be thermally anchored at 4 2K IVC flange and 1K pot t
5. hen terminated near B field centre 24 x 0 005 diameter insulated manganin wires in 16 x twisted pairs will be installed on feedthrough C All wires will be thermally anchored at 4 2K IVC flange and 1K pot then terminated at approximately 18 0 below the He 3 pot Wiring must have a break with cinch type connectors to accommodate filters Six 6 double ended hermetic SMA feedthrough installed on the IVC pumping manifold 4x model UT 85 SS semi rigid coaxial cables with SMA bulk head connectors mating Attenuators 10 dB XMA corp cryogenic attenuators www xmacorp com part number 2082 6418 10 CR or equivalent Rosenberger Nichrome thin film attenuators at 4K 1K and 300 mK stage Cables must have enough thermal length to block heat and must be bent at several locations approx twice the min bend radius to provide stress relief The outer conductors of the semi rigid coaxial cables will be thermally anchored at 4 2K and 1 6K properly preferably on a removable OFHC disk with holes for a bulk head SMA connector 2X UT 85 cables from KEY COM ULT 05 cable with 1dB attenuators 2082 6418 01 CR anchored at 300 mK 1K and 4 2K stages anchored via bulkhead connectors 3 Bias tees to be installed on 300 mK stage BT 1800 NC from Miteq i e no ferromagnetic core www miteg com One cryogenic amplifier circulator to be installed in one of the UT 85 ULT 05 line with bias tees Drawings will be provided after order acknowledgement All lines must e
6. s When pressure in main dewar or re liquefier is not manaegable the system should vent the excess Helium to a recovery line Valve to manually recover during transfer must be provided Main cryostat dewar insert must be electrically isolated from PTR compressor This must be done by derlin flanges connecting to motor head Temperature controller 1 2 3 4 5 Lake Shore 336 AC Bridge cum controller 50 ohm heater with 50 ohm nichorme wiring on He 3 stage Two heater channels Four sensor channels PID controls with labview drivers Dewar 1 Vapour cooled Dewar with vacuum jacket and Belly design to accommodate magnet 2 Must be serviceable to repair or change magnet if necessary 3 Option to raise or lower dewar magnet or insert must be provided via pulley with weights or manual winch 4 Alumnium frame to raise and lower insert or insert dewar Accessories a UPS 1 One 6 KW with 300 over rating for 100mS for magnet pumps increase rating based on power supply magnet needs 2 One 6 KW for measurement system 3 Appropriately rated UPS for re liquefier water chiller All UPS units must have 30 mins back up isolation transformer with 5 year waranty for battery UPS Preferred UPS vendors with good local service for lab equipment in Chandigarh Mohali area Messrs Essar Engineers sanjeev gupta essarups com and Messrs Power One systems www poweroneups com 4 Pumping station Dry pumping station for IVC
7. s to readout four wire resistance Liquid nitrogen fill and push out tubing Helium level sensor Level meter Model LM 510 or equivalent liquid cryogen monitor Appropriate displays key pads for local control of magnet standard ethernet and USB computer connectivity 4 20mA and 0 10V analog output standard Options for IEEE 488 2 or RS 232 Universal power input Compact dimensions Configurable as a single channel unit to monitor liquid helium or liquid nitrogen Separate alarm or refill set points for each channel Sample and hold operation burnout protection and de ice cycle for liquid helium level sensors Level Indication in centimeters inches or LabVIEW drivers Magnet Power supply SO BON Oy gente 4 quadrant true bipolar system featuring smooth sweeps through zero Automatic quench detection and protection Clear display of magnet status Current setting resolution of 0 1 milliamps Five 5 programmable sweep rate ranges Persistent switch heater power supplies 15 foot length output cables USB IEEE 488 2 and Ethernet computer interfaces standard Safety interlocks for persistent switch enable disable and changing of important magnet parameters and limits 10 11 12 13 14 Visual confirmation of current present in leads to alert users to be mindful of safety when operating the power supply even if line power is off Option to power off supply when in persistent mode Labivew
8. with recondensing systems 2 Atleast one recondensing system tested with a high field integrated magnet or magnet systems with recovery 3 Atleast supplied 3 5 helium3 systems or dilution fridge systems Dry system 4 Must have supplied atleast 3 PTR based He3 systems with inegrated magnets General 5 We may call bidders for a presentation and further evaluate competence of bidder or clarify any technical or financial issues 6 Minor deviations in specs or qualification criteria will be at the discretion of the technical committee Alternate Options Compaines may quote for dry system with integrated magnets and following features in place of wet system Qualifying criteria would be more than 3 dry He3 systems with integrated magents must have been supplied 1 All wiring microwave cables coldfinger temperature control etc etc must be same as specified above 2 All necessary accessoried like UPS etc must be quoted as per specs 3 1W 4 2K PTR based system 4 System must have remote motor head located on floor to provide low vibrations 5 6 7 8 9 System must have vibrations lt 150 nm in low frequency range milli Hz to few Khz Appropriate stands must be provided to reach this level Sample must have puck for bottom loading load lock puck 6 microwave connections upto 18 GHz in parallel field and perpendicular field configurations separately One additional DC 48 twisted pairs and 3 RF connections
9. with scroll backing pump and 80 Ips turbo 5 1K pot pump Rotary vane pump with oil mist filter and KF connections 6 Bellows for IVC 3m and 1K pot 4m etc OEM or KJ Lesker or Excel Instruments Mumbai 7 Spare Semi rigid Coax UT 85 10 m BeCu or cupro nickel with no silver plating in units of 1 m Coax Co Japan Rosenberger Microcoax or Huber Suhner KEY COM 8 one chiller with outdoor heat exchanger unit and indoor controls and water tank Must have remote interface to monitor chiller Chiller must have 5 years warranty 9 One control PC HP or Dell with Windows 7 8 Intel I 5 10 19 Instrumentation rack for magnet power supply AC bridge and control PC One additional 32 34 U rack to be provided Valrack or any brand supplied by OEM 11 Stand for insert servicing or wiring insert Manuals Drawings etc 1 All drawings of system must be submitted for approval around 1 month from PO 2 All wiring drawings for thermometers heaters 3 User manual for main equipment and all accessories 4 Please give ceiling height pit depth requirements etc Service amp Installation 1 Entire unit including re liquefier must be installed 2 Service for all components must be provided Warranty 1 1 year on Cryostat pumps etc 2 5 years on recondenser including consumables for PTR compressor etc Qualification Criteria wet system 1 Companies must have manufactured and tested atleast 3 systems helium 3 or Dilution fridge
10. xtend to field centre provided with SMP connectors for parallel field orientation Exact design to be confirmed after order Cold finger Cylindrical OFHC base 60 m outer dua and 50mm inner dia mounted on He3 plate OFHC tube with slots to cover the sample area mounted on the Cylindrical base OFHC bus bars to sandwich cables One set of manganin twisted pair set must reach field centre One additional clear shot port with 6 Hermetic SMA connectors Magnet epa Po oy On Solenoid configuration 8 Tesla central field 4 2K 4 clear bore in case of solenoid Quote for 8 Tesla Solenoid and 1 T Split pair in horizontal axis In this case quote Bore size to accmodate 60 mm sample space appropriate VC 0 1 central field homogeneity over a 10 mm DSV Persistent mode switch installed Fully protected against damage due to quench 8 Please quote for field cancellation as an option atleast 5 and 5 cm above and below 300 mK stage Only for solenoid in case of 2 axis magnets Specify lowest fields attainable Magnet support Assembly with top flange radiation baffles quench relief port and etc l 2 3 4 ye 10 11 12 13 14 15 16 17 One 1 pairs of vapor cooled brass high current leads Vapor cooled brass high current leads Magnet leads must be properly isolated from cryostat for proper grounding Carbon resistance thermometers installed at the bottom top of the magnet with pin

specifications-442

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