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Liquid H 2 Absorber Production

Liquid H 2 Absorber Production. Shigeru Ishimoto KEK MICE CM-24, May 31 - June 3, 2009 - RAL. Contents MICE Absorber Status MICE Absorber Modification Plan/Schedule Summary. MICE CM-23 in HARBIN. New Absorber Test Area ( KEK North Counter-Hall ). OLD K2K BEAM LINE. Test Cryostat.

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Liquid H 2 Absorber Production

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  1. Liquid H2 Absorber Production Shigeru Ishimoto KEK MICE CM-24, May 31 - June 3, 2009 - RAL • Contents • MICE Absorber Status • MICE Absorber Modification • Plan/Schedule • Summary MICE CM-23 in HARBIN

  2. New Absorber Test Area ( KEK North Counter-Hall ) OLD K2K BEAM LINE Test Cryostat 2 m3 G-H2 Tank

  3. 4 Mini-flanges 2 heater machining after welding 2 test windows

  4. Absorber at MIRAPRO ( Mar-13th, 2009 ) 368 mm Error <0.2>

  5. Absorber at MIRAPRO ( Feedthrough and Parts ) G-10 Support Parts L-H2 In and 30 Pin Feedthrough

  6. Absorber at MIRAPRO ( Thanks MIRAPRO Technician and Engineer ) Aluminum Welding Expert Mr. Nakamura

  7. Absorber at MIRAPRO ( He Leak Test ) No He Leak

  8. Absorber at MIRAPRO ( Pressure Test at 3.0 bar ) No N2 Leak at 3.0 bar

  9. Temperature & Level Sensors in the Absorber In L-H2 in G-H2 10 Cernox 1050-SD Calibrated 4 - 329K (Supplied by LBNL) 2 wires; 5 Thermometers IT = 0.1 mA 2 wires; 5 Level sensors IL = 0.5 or 1.0 mA (Total ; 20 wires) 10X2 = 20 wires

  10. Sensor and Heater ( Overall ) HTR-25W-100W 10X2 = 20 25.4 D=1/4”

  11. Level Sensor Current

  12. Absorber Assemble soft solder and shrink tubes Sensor Blocks Cable in groove Cernox 1050-SD

  13. Absorber Assemble 5 Sensor Blocks Aluminum Plates t=1 mm Aluminum Punching Board t=0.5 mm

  14. Absorber Assemble L-H2 OUT L-H2 IN and 30 Pin Connecter Connecter x2 Thermometer Blocks x4 Heaters x2

  15. Absorber Assemble L-H2 IN M.L.I. G-10 Support x8

  16. Absorber Assemble L-H2 IN Connecter x2

  17. AFC Magnet Problem 0.4mm Solution 1 422.4 372.4 5.0 9.0 4.0 47.5 2.5 9.4 25  35 mm 24 35.0 310 Thermal radiation shield bobbin Large End Flange locally thinned down to 2.5 mm Magnet cryostat 39.0 Large End Flange 10.4 386.0 This solution is to shift the absorber upstream by 10.4mm ( Slide by Wing Lau )

  18. AFC with ABSORBER Modification Plan Off Center 10.4 mm Too Narrow Points

  19. AFC with ABSORBER Modification Plan Too Narrow Points M.L.I. t=3 Off Center 10.4 mm

  20. AFC with ABSORBER Modification Plan Absorber Support Flange on MAGNET CRYOSTAT Too Narrow Points

  21. AFC with ABSORBER & Large End Flange Absorber Support Flange on MAGNET CRYOSTAT Too Narrow Points

  22. Pipes Extension Plan Cut 4 Pipes at +5 mm Line 368 mm 4 New Elbows; + 15.4 mm Horizontal (10.4 + 5) + 5 mm Vertical

  23. Pipes Extension Plan 368 + 10.4 mm 4 New Elbows

  24. Disassembled !! ( May 20th, 2009 at KEK ) Cut Here (+5 mm Line)

  25. Absorber Schedule Absorber Body-#1 Schedule was 3 month delayed due to pipes modification. Absorber Body-#2 will be ordered on Jul-Aug 2009. Absorber Body-#3 will be ordered in FY2010 in Japan.

  26. Summary • The first absorber body was successfully fabricated and tested by MIRAPRO. The absorber arrived at KEK on Mar-18th at KEK. • Absorber body assemble was finished at KEK temporally. • Test cryostat preparation and DAQ programming are in progress. • Absorber parts are disassembled to extend 4 pipes +10.4 mm. This solution was accepted by the MICE-TB on May-18th. • We need enough space at large end flange to minimize risk of heat leaks. • Absorber needs a support structure on the magnet cryostat. • Schedule; Absorber Body-#1 Schedule was 3 month delayed due to pipes modification. Absorber Body-#2 will be ordered on Jul-Aug 2009. Absorber Body-#3 will be ordered in FY2010 in Japan.

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