liquid-hydrogen absorber: shigeru ishimoto kek contents (1)introduction (2)mice absorber design...
TRANSCRIPT
Liquid-hydrogen absorber:
Shigeru Ishimoto KEK
Contents
(1) Introduction
(2) MICE absorber design
(3) Prototype absorber test at KEK
(4) MICE absorber instrumentation
(5) Schedule
(6) Summary
status report
hydrangea
UKNF/MICE Oversight Committee meeting, RAL, Jul-21, 22, 2008
MICE cooling channel
Drawing by S. Q. Yang
Tracker Module 1
Tracker Module 2
AFC Module 1 AFC Module 3
AFC Module 2
RFCC Module 1
RFCC Module 1
BEAM
AFC (Absorber & Focus Coil) moduleCryomech PT415 cooler
LH2 condenser
Safety windows
absorberwindows
G-10 SupportAbsorber & Pipes
Mini In-Flange (Al-SS)
30 PinFeedthrough
Tee
L-H2 IN
G-H2 OUT
G-He/N2 OUT
L-He/N2 IN
A-A’(22.5 deg.)
G-H2 OUT
L-H2 IN
G-He/N2 OUT
LHe/LN2 IN
Tee
30 PinFeedthrough
Heat- exchanger
LH2 LH2
MIRAPRO Co.
Liquid-hydrogen absorber
Flange of MICE absorber
Design window; Oxford Design flange; KEK Machining ; Mississippi
Tolerance between flange and body: 0.1-0.3 mm
G-10 (x8)
t=1, W=25, L=90 mm
Total ~ 0.2 W
SS, t=1Screws on
AFC Magnet
76.5
34
SS 15.7
AL 14.8
34
From Absorber
Small flange and G-10 support
Tee and 30 pin feedthrough
In seal
Kyocera 30 pin feedthrogh
Support for pipe
welding
pipe welding
L < 0.5mm
Prototype absorber
MICE absorber test at KEK
1,959T.M.P.
LH2 condenser
Dummy bore(room temperature)
Prototype absorber
Prototype absorber test at KEK
0.30 l / h , 2.6 W 1.33 l / h , 11.7 W
2000 l tank
Cooling stopLH2 1.43 l
68 hrs to fill 20 l
Liquefaction and vaporization of LH2 in 20 l
Absorber
MICE absorber test at KEK
H2 vapor
Cernox calibration curve
H2 Press (Torr)
n-H2 Temp.(K)
e-H2 Temp.(K)
Absorber Temp.(K)
T (K)
DAY
MICE absorber test at KEK
10 Cernox 1050SD
4 wires; AB101, 102, 105, 109,110
2 wires; AB103,104,106,107,108
(Total 5*4 + 5*2 = 30 wires)
Im=0.1 mA; 101,103,105,107,109
Im=1 mA; 102,104,106,108,110
Temperature & level sensors in the absorber
In LH2
over heating mode in gas
Sensor and heater (overall)
HTR-25-100W
25.4
CX-1050-SD
Sensor blocks
2 cernox inside absorber
cernox for L-H2 pipes
cernox for L-N2 pipes
19
16
20
5
20
2 or 4 x 0.14 mm2 ETFE cable
Delivery of 1st FC Oct 2009
Spring 2010
Q4 2010-- 2011
STEP VISTEP V
STEP IV
MICE absorber schedule
KEKto RAL
Arrive 2 absorber flanges from US
KEK RAL
Summary
(1) Absorber R&D at KEK was successfully finished and MICE absorbers were designed based on this experience.
(2) We are ordering the first MICE absorber body to Japanese company. It will be delivered by the end of Oct-2008 after the cooling test at KEK. The Second absorber will be ordered in Nov-2008, and delivered by Feb-2009.
(3) Thermometer/level sensors inside and outside absorber body will be wired in Japan.
(4) Thin absorber flanges will be set at RAL. First flanges will be delivered by May-2009 from Univ. of Mississippi.
(5) The overall assemble in the AFC module will start from Jul-2009 at RAL.
Thank you
Hokusai Katsushika “Hydrangea and Swallow”