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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. - PowerPoint PPT Presentation
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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
New Absorber Test Area
( KEK North Counter-Hall )
Test Cryostat
2 m3 G-H2 Tank
OLD K2K BEAM LINE
machining after welding
2 heater
2 test windows
4 Mini-flanges
Absorber at MIRAPRO
( Mar-13th, 2009 )
368 mm Error <0.2>
Absorber at MIRAPRO
( Feedthrough and Parts )
G-10 Support Parts
L-H2 In and 30 Pin
Feedthrough
Absorber at MIRAPRO
( Thanks MIRAPRO Technician and Engineer )
Mr. Nakamura
Aluminum Welding Expert
Absorber at MIRAPRO
( He Leak Test )
No He Leak
Absorber at MIRAPRO
( Pressure Test at 3.0 bar )
No N2 Leak at 3.0 bar
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)
Sensor and Heater ( Overall )
HTR-25-100W
25.410X2 = 20
D=1/4”
Level Sensor Current
Absorber Assemble
Sensor BlocksCable in groove
soft solder and shrink tubes
Cernox 1050-SD
Absorber Assemble
Aluminum Punching Board
t=0.5 mm
Aluminum Plates t=1
mm
5 Sensor Blocks
Absorber Assemble
Thermometer Blocks
x4
Heaters x2
Connecter x2
L-H2 IN and 30 Pin Connecter
L-H2 OUT
Absorber Assemble
G-10 Support
x8
M.L.I.
L-H2 IN
Absorber Assemble
L-H2 IN
Connecter x2
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
AFC with ABSORBER
Modification Plan
Too Narrow Points
Off Center 10.4 mm
M.L.I. t=3
AFC with ABSORBER Modification Plan
Too Narrow Points
Off Center 10.4 mm
AFC with ABSORBER Modification Plan
Too Narrow Points
Absorber Support Flange on MAGNET CRYOSTAT
AFC with ABSORBER & Large End Flange
Absorber Support Flange on MAGNET CRYOSTAT
Too Narrow Points
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
Pipes Extension Plan
368 + 10.4 mm
4 New Elbows
Disassembled ! ! ( May 20th, 2009 at KEK )
Cut Here
(+5 mm Line)
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.
