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Liquid-hydrogen absorber:

Liquid-hydrogen absorber:. status report. Shigeru Ishimoto KEK. UKNF/MICE Oversight Committee meeting, RAL, Jul-21, 22, 2008. Contents Introduction MICE absorber design Prototype absorber test at KEK MICE absorber instrumentation Schedule Summary. hydrangea. AFC Module 2.

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Liquid-hydrogen absorber:

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  1. Liquid-hydrogen absorber: status report Shigeru Ishimoto KEK UKNF/MICE Oversight Committee meeting, RAL, Jul-21, 22, 2008 • Contents • Introduction • MICE absorber design • Prototype absorber test at KEK • MICE absorber instrumentation • Schedule • Summary hydrangea

  2. AFC Module 2 RFCC Module 1 Tracker Module 2 AFC Module 3 AFC Module 1 RFCC Module 1 Tracker Module 1 MICE cooling channel m BEAM Drawing by S. Q. Yang

  3. AFC (Absorber & Focus Coil) module Cryomech PT415 cooler (1.5W@4.2K) LH2 condenser absorber windows Safety windows

  4. G-H2 OUT Mini In-Flange (Al-SS) G-He/N2 OUT G-10 Support Absorber & Pipes  L-H2 IN L-He/N2 IN Tee 30 Pin Feedthrough

  5. A-A’ (22.5 deg.) G-He/N2 OUT G-H2 OUT Heat- exchanger LH2 LH2 Tee  L-H2 IN LHe/LN2 IN 30 Pin Feedthrough

  6. Liquid-hydrogen absorber MIRAPRO Co.

  7. Flange of MICE absorber Tolerance between flange and body: 0.1-0.3 mm Design window; Oxford Design flange; KEK Machining ; Mississippi

  8. Small flange and 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 Screws on AFC Magnet 34 AL f14.8 From Absorber

  9. Tee and 30 pin feedthrough In seal Kyocera 30 pin feedthrogh

  10. Support for pipe welding DL < 0.5mm pipe welding

  11. MICE absorber test at KEK G-M Cryocooler 1.5W@4.2K LH2 condenser T.M.P. 1,959 Dummy bore (room temperature) Prototype absorber

  12. Prototype absorber

  13. Prototype absorber test at KEK

  14. Liquefaction and vaporization of LH2 in 20 l Absorber 2000 l tank 0.30 l / h , 2.6 W 1.33 l / h , 11.7 W  68 hrs to fill 20 l LH2 1.43 l Cooling stop

  15. MICE absorber test at KEK H2 vapor Cernox calibration curve

  16. MICE absorber test at KEK H2 Press(Torr) n-H2 Temp.(K) T (K) e-H2 Temp.(K) Absorber Temp.(K) DAY

  17. Temperature & level sensors in the absorber In LH2 10 Cernox 1050SD 4 wires; AB101, 102, 105, 109,110 2 wires; AB103,104,106,107,108 (Total 5*4 + 5*2 = 30 wires) Im=0.1 mA; 101,103,105,107,109 Im=1 mA; 102,104,106,108,110 over heating mode in gas

  18. Sensor and heater (overall) HTR-25W-100W 25.4

  19. Sensor blocks 20 5 2 cernox inside absorber 19 2 or 4 x 0.14 mm2 ETFE cable CX-1050-SD cernox for L-H2 pipes 16 20 cernox for L-N2 pipes

  20. MICE absorber schedule STEP V STEP IV Spring 2010 STEP VI Delivery of 1st FC Oct 2009 Q4 2010 -- 2011 KEK to RAL KEK RAL Arrive 2 absorber flanges from US

  21. Summary • Absorber R&D at KEK was successfully finished and MICE absorbers were designed based on this experience. • We are ordering the first MICE absorber body to Japanese company. It will be delivered by the end of Oct-2008 after the cooling test at KEK. The Second absorber will be ordered in Nov-2008, and delivered by Feb-2009. • Thermometer/level sensors inside and outside absorber body will be wired in Japan. • Thin absorber flanges will be set at RAL. First flanges will be delivered by May-2009 from Univ. of Mississippi. • The overall assemble in the AFC module will start from Jul-2009 at RAL.

  22. Thank you Hokusai Katsushika “Hydrangea and Swallow”

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