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Absorber R&D and Instrumentation

Absorber R&D and Instrumentation. Shigeru Ishimoto KEK and MICE Japan. MICE Meeting at FNAL, Jun 8-11, 2006. “Sakuraso” Japanese Primula and Green House. MICE Absorber (present version). Room Temp. Magnet Bore. L-He/N2 OUT. Thermometers CX-1050-SD. L-H2 OUT. L-H2 Level Sensor

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Absorber R&D and Instrumentation

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  1. Absorber R&D and Instrumentation Shigeru Ishimoto KEK and MICE Japan MICE Meeting at FNAL, Jun 8-11, 2006 “Sakuraso”Japanese Primula and Green House

  2. MICE Absorber (present version) Room Temp. Magnet Bore L-He/N2 OUT Thermometers CX-1050-SD L-H2 OUT L-H2 Level Sensor CX-1050-SD (20 L) L-H2 IN L-He/N2 IN 2-Heaters HTR-25-100

  3. Absorber Test Cryostat & Test Absorber

  4. Condenser & Level Sensor 192 KF40 L=100 Pipe For Test (0.2 L) 48 pin feedthrough on KF40

  5. L-H2/LHe Level sensor in absorber DC ~mA DC Current for L-H2/LHe should be optimized (KEK R&D).  V4 V3 LHe LH2 CX-1050-SD 

  6. LH2/He Level Sensor KF40 L=100 Extension Tube 2 cm CX-1050-SD X5 (serial) 2 cm 2 cm 2 cm CX-1050-SD X1 calibrated (4 wires) KF40 + 48 pin feedthrough

  7. Cryocooler & Condenser Heat Links 1st stage Condenser Heater HTR-25-100 (100W) LH2 IN/OUT 2nd stage LH2 Condenser LH2/He Level Sensor In Extension KF40 + 48 pin feedthrough

  8. Absorber Test Cryostat MLI H2 TANK 2m3 (1.0-1.3 bar) ~1 L

  9. Absorber DAQ System LakeShore 218S Cernox x8 Keithley 2700 DMM MKS 0-2000 Torr Level #1-5 VAC. Gauge . . . MONITOR (LabView) Shoji Suzuki Keithley 2700 DMM LakeShore 218

  10. Cryostat Test Results 0.368 l/h  (3.23 W) (MICE; 57 hr for 20 l) Empty 0.20 l/h  (1.77 W) 4 hrs; 300K  20 K Cryocooler OFF

  11. Level Sensor Test Results X100 X100

  12. L-H2 Level Sensor Test ~ 3 mW each ~ 0.2 mW Good linearity in L-H2 It will be tested in gas phase ~ 0.75 mW Thermometer 0.01mA

  13. Revision of Absorber Parts Motivation Effect of cryocooler selection Smaller packing size Easy setup Wiring path near absorber Remove risk of transition joint Accuracy of pipe assemble 1 more joint between cryocooler and absorber without transition joint • Changed or new parts • Transition Joint  Mini flange with In-seal • G-10 support of absorber & pipes • 30 pin feedthrough at LH2 Inlet pipe • L-He IN & OUT; straight pipes • Assemble & welding method of pipes

  14. G-H2 OUT Mini In-Flange He/N2 OUT G-10 Support Absorber & Pipes  L-H2 IN He/N2 IN Tee 30 Pin Feedthrough

  15. A-A’ (22.5 deg.) He/N2 OUT G-H2 OUT Straight Pipes Tee  L-H2 IN He/N2 IN 30 Pin Feedthrough

  16. Mini In-Flange No-Transition G-10 Support Absorber & Pipes cut after welding Heater • L-H2 IN

  17. Mini In-Flange; SS/Al joints Mini Rotational Flange SS In In AL LH2 IN/OUT If it needs rotation He IN/OUT

  18. G-10 Support G-10 x8 t=1, W=25, L=90 mm Total ~ 0.2 W 34 SS f15.7 6.5 7 SS, t=1 34 Screws on AFC Magnet AL f14.8 From Absorber

  19. 30 Pin Feedthrough In

  20. Wiring of thermometers, level sensor & heaters • 4 wires measurement for thermometers and heaters • LakeShare x2 218S Max. 16 Cernox 6 for absorber (2 on top )  5 8 wires for level sensors Total 32 wires inside absorber  28 2 for windows 2 for LH2 pipes 2 for C-He pipes 3 for Cryocooler  2 1 for magnet bore 3 heaters Total 52 wires in vacuum 30 Pin Feedthrough 48 Pin Feedthrough at Vacuum

  21. MICE absorbermonitor/control (plan) ALRAM, VALVES, CRYOCOOLER-OFF, HEATER-OFF… Programmable Controller or LOGIC LAN DIRECT CONTROL DIO Contacts PC / WS IEEE-488 DMR 1-6 2CH AC Bridge 370S DCPS DCPS DCPS cc1mA Keithley/ADC Inside Abs. Abs. HTR-UP Abs. LEVEL CX-1050 16 CX-1050SD’s READ OUTS CRYOCOOL HTR Abs. HTR-DWN 3-HTR 5-CX-1050 CRYOSTAT P&VAC&LEVEL Sensors

  22. (EXCEL FILE) http://ishimotopc2.kek.jp/MICE-Instruments.xls

  23. Thermometers in absorber AC Bridge 370S 3716; 16ch Scanner CX-1050-SD

  24. LakeShore Cartridge Heater

  25. Detail heater assemble for MICE absorber HTR-25-100 ¼” Hole STOPPER

  26. Digital meter relay for MICE Absorber/Cryocooler DMR; DIGITAL METER RELAY (Digital comparator) Watanabe (Japan) for example INPUT WSM-452HR-R3NNNX-22VD ; DC 0-199.99 mV WSM-452HR-R3NNNX-32VD ; DC 0-1.9999 V WSM-452HR-R3NNNX-42VD ; DC 0-19.999 V WSM-452HR-R3NNNX-52VD ; DC 0-199.99 V OUTPUT( 4.5 digit set) HI-relay (NC, HO) LO-relay (NC, NO) Scaling; A-B (V)  C-D (Unit) DC24V

  27. Summary • Absorber R&D at KEK • - Level sensor test is going • - Absorber L-H2 cooling will start soon • Revision of Absorber Parts • - New parts - - - Mini In-Flanges, G-10, feedthrough, tee … • - Pipe assemble, installation tools • (3) Absorber Instrumentation Detail • - Selection of Cernox read out, with or without heater control • - Needs monitor/control program

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