liquid h 2 absorber production contents (1)mice absorber status (2)mice absorber modification...
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Liquid H2 Absorber Production
Contents(1) MICE Absorber Status
(2) MICE Absorber Modification
(3) Plan/Schedule
(4) Summary
MICE CM-23 in HARBIN
Shigeru Ishimoto KEK
MICE CM-24, May 31 - June 3, 2009 - RAL
Temperature & Level Sensors in the
Absorber
10X2 = 20 wires
In L-H2 in G-H2
2 wires; 5 Thermometers IT = 0.1 mA
2 wires; 5 Level sensors IL = 0.5 or 1.0 mA
(Total ; 20 wires)
10 Cernox 1050-SD
Calibrated 4 - 329K
(Supplied by LBNL)
Absorber Assemble
Thermometer Blocks
x4
Heaters x2
Connecter x2
L-H2 IN and 30 Pin Connecter
L-H2 OUT
9.4
9.0
35.0
4.0
5.0
310
47.5
39.0
2.5
422.4
bobbinThermal radiation shield
Magnet cryostat
Large End Flange
386.0
372.4
24
10.4
This solution is to shift the absorber upstream by 10.4mm
0.4mm
Large End Flange locally thinned down to 2.5 mm
AFC Magnet Problem
( Slide by Wing Lau )
Solution 1
25 35 mm
Cut 4 Pipes
at +5 mm Line
4 New Elbows; + 15.4 mm Horizontal
(10.4 + 5)
+ 5 mm Vertical
368 mm
Pipes Extension Plan
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.
Summary
(1) The first absorber body was successfully fabricated and tested by MIRAPRO. The absorber arrived at KEK on Mar-18th at KEK.
(2) Absorber body assemble was finished at KEK temporally.
(3) Test cryostat preparation and DAQ programming are in progress.
(4) Absorber parts are disassembled to extend 4 pipes +10.4 mm. This solution was accepted by the MICE-TB on May-18th.
(5) We need enough space at large end flange to minimize risk of heat leaks.
(6) Absorber needs a support structure on the magnet cryostat.
(7) 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.