Absorber R

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Absorber RD Progress
KEK S. Ishimoto, S. Suzuki
K. Yoshimura Osaka Univ. Y. Kuno, A.
Horikoshi
MICE Meeting at RAL, Oct-23, 2005
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MICE Absorber System with Cryocooler
G-H2 cylinders/H2 tank/ Metal hydride
He refrigerator
G-H2 safety exit and reservoir tank
L-He Dewar
L-N2 Dewar
He, N2 gas exit/return
G-He cylinders
Exit to cool the transfer tube
H2 leak monitor
Absorber vacuum system
Safety exit for H2
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MICE Absorber
Room Temp. Magnet Bore
L-H2 OUT
L-H2 Level Sensor
Thermometers
Lake Shore CX-1050-SD
L-H2 IN
2-Heaters
Lake Shore HTR-25-100
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Test Cryostat at KEK -- Original Plan
MICE
Cryocooler RDK-415D
MICE Test Absorber
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Absorber Test Subjects at KEK
Test Absorber ? Real Absorber 1, 2, 3 (1)
Absorber leak test at 20K and 4.2K body,
pipes, In seal (2) LH2 absorber (lt 1 L)
pre-cooling process with LN2 or without LN2
cooling speed, warm up speed cooling power and
heat leak test (3) LHe absorber 1.5W_at_4.2K
pre-cooling process with LN2 or LHe cooling
speed, warm up speed cooling power and heat
leak test How much additional Lhe, if it
needs? (4) Instrumentation LH2 level and
temperature sensor test control and DAQ (5)
Real window test at 20 K?
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Test Cryostat with Test Absorber
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New Parts (1)

• Needs Modify
• gt Aluminum plug at top
• gt KF25 pipe on window
• Needs Parts on/in Absorber
• gt Flexible pipes
• gt LH2 level sensor
• gt Thermometers
• gt G10 supports

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New Parts (2)

• Needs Parts around condenser
• gt LH2 condenser body
• gt Flexible pipes
• gt Thermal links
• gt Feedthrough

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Top Flange Absorber Support
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Cryocooler
H2 Condenser
6-M5
Cryocooler Bottom Flange
Indium/Grease
- Copper Flange T6 mm - Screws 6-M5 on
copper - Weight 23Kg Mechanical design Good
thermal contact
LH2 Supply 5 mm higher than bottom to
keep LH2 level
KEK LH2 target
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Feedthrough at 20K
LH2
VAC
KF40 48 pin LH2 Level sensor
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Test Cryostat with MICE Absorber 1,2,3
Vac. Pump Gate Valve
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Test Cryostat with MICE Absorber
Needs pipe joints
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Absorber Test Cryostat
Cryocooler
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Absorber Test Cryostat
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Parts (1)
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Parts (2)
Fix and Flexible Tubes
Test Absorber
Absorber is now at the company to modify the top
port and window.
G10-SUPPORT
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Parts (3)
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Summary

• Test items at KEK
• (2) The Cryocooler, test absorber, T.M.P. and
  vacuum gauges were temporally assembled to decide
  pipe length.
• (3) The LH2 condenser and related parts were
  designed and ordered.
• (4) Flexible and fixed pipes were designed and
  ordered.
• (5) Feedthrough (48pins) were ordered.
• (6) We will start the parts assemble from
  mid-November.
• (7) Absorber cooling starts this year
• 1st test Cryocooler H2 condenser
  cooling test
• 2nd test with absorber cooling test
• 3rd test cooling power and heat
  leak test
• ? LHe absorber test