1. Liquid Hydrogen Absorber
AFC module status:
Liquid Hydrogen Absorber
Shigeru Ishimoto KEK
CM20 at RAL, Feb 10-13, 2008
Nufact07, Okayama

2. OUTLINE 1) MICE Absorber Design by KEK
2) MICE Absorber Design by MIRAPRO
3) MICE Test Cryostat at KEK
4) Superfluid L-He Absorber R&D at KEK
5) Summary and Plan

3. AFC Module with MICE Absorber Mini-Flanges (In-Seal) G10 Supports
LH2 IN
30 Pin
Feedthrough

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

5. A-A’ (22.5 deg.) He/N2 OUT G-H2 OUT Straight Pipes No Metal Transition
Tee
 L-H2 IN
He/N2 IN
30 Pin
Feedthrough

6. Mini In-Flange; Al/SS joints
Mini Rotation Flange SS In In AL
LH2
IN/OUT He
IN/OUT

7. Detail of 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 34
Screws on
AFC Magnet
AL f14.8
From Absorber

8. Pipe Welding Method L= 501+1.62  0.5 mm L AL(D=669mm) Adjustable 386
(Al 20K, SS 300K)
Welding at Upside down position is also possible
386 L

9. Instrumentation of Sensors & Heaters

10. MICE Absorber Design by MIRAPRO

11. MICE Absorber Design by MIRAPRO
MIRAPRO Co.
Restart Design; Jan, 08
Rough Estimation; Feb, 08
Official Order; Jun, 08
Absorber Body #1 to KEK;
~ Sep, 08
Assembly and Test;

12. MICE Absorber Design by MIRAPRO
G-H2 OUT
He/N2 OUT
He/N2 IN
 L-H2 IN A

13. MICE Absorber Design by MIRAPRO
G-H2 OUT
 L-H2 IN

14. MICE Absorber Design by MIRAPRO
He/N2 OUT
A-A
He/N2 IN

15. MICE Absorber Design by MIRAPRO

16. MIRAPRO Co.

17. MIRAPRO Co.

18. MIRAPRO Co.
Rough Estimation; Feb,08
Body ~ 2,000K yen
(~ $18,180)

19. MICE Test Cryostat at KEK

20. Insert to Vacuum Chamber
Pipes with
MLI ~2 layers

21. Top view of cryostat H2 gas tank (2000 l) Cryocooler
Bendix 18 pin connector x2
TMP
H2 press. transducer
Top view of cryostat

22. MICE Test Absorber MLI Wrapped
MLI layer
Al-Mylar 9m x5
+ Polyester Mesh x6
Window
1 layer
Body
4 layers

23. T (K) DAY H2 Press (Torr) n-H2 Temp.(K) e-H2 Temp.(K)
Absorber Temp.(K)
DAY

24. Super Fluid LHe Absorber R&D at KEK Superfluid L-He Absorber

25. Superfluid L-He Absorber
Absorber Test Cryostat
4.2K
Wedge Absorber
(plan)
Q~100W
dT~0K 1K
Absorber
Abs.
75mm Mylar Window

26. Cooling Power Test with Sp=120 m3/hr
2.7
1.8
L-He consumption (L/h)
0.9

27. Cooling Power of Superfluid He Absorber
　　　　6,000 m3/hr, ~ 100 W
P x2 Sp x50
Superfluid L-He Target (Sp=120 m3/hr, 1.0 W at 1.63 K)

28. Superfluid L-He Absorber
60 mm
80 °
80 °
134 mm
200 mm
L-HeⅡ
Mylar mm

29. Summary and Plan MICE Absorber Design by KEK
- KEK design finished
2) MICE Absorber Design by MIRAPRO
- Restart absorber design and cost estimation
- Order ~May, 08, + 3 month delivery to KEK
3) MICE Test Cryostat at KEK
- Temperature controlled by Cryocooler heater
4) Superfluid L-He Absorber R&D at KEK
- Test absorber was designed and fabricated

30. Thank You