Absorber Production Status
Contents
(1) MICE absorber design/status
(2) MICE absorber instrumentation
(3) Schedule
(4) Summary
Sasanqua at KEK on 13-DEC,’09
Shigeru Ishimoto KEKMICE CM23, HIT in Harbin China, 13-17 Jan, 2009
machining after welding
heater
2 test flanges
Body; cut from single Al-block
oversize before finishing
Pipe-welding support flange
Tee and 30 pin feedthrough
In seal
Kyocera 30 pin feedthrough
LH2 In
to absorber
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
Flange of MICE absorber
Design window; Oxford Design flange; KEK Machining ; Mississippi
Tolerance between flange and body: 0.1-0.3 mm
Flange-Body Tolerance
In 1.0
Gap 0.5
Prototype absorber test at KEK
10 Cernox 1050SD Calibrated 4- 300K
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
VAC. tight
VAC/LT tight
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
X 5
X 2
X 2
Instrumentation
Temperature Readout Lake Shore Thermometer Readout 218S
8 Cernox (4 inside, 4 outside)
Heater controller Lake Shore Heater controller 332S
1 Cernox (bottom) + 1 Heater ( 1 spare)
Over Current Readout (LH2 Level Sensor) DC PS (constant current); 0 – 1 mA(max)
Keithley 2700 DMM; 20 CH
5 Cernox (5 inside) + 2 Heater Volts
X 1
X 1
X 1 set
Status of Absorber parts
ITEM Maker Status comments
Absorber body 1 Mirapro 12-Mar, '09 Osaka
Test windows 2 Mirapro 12-Mar, '09 Osaka
Test flexible tubes 4 Mirapro 12-Mar, '09 Osaka
Thermometers (Inside body) 10 LakeShore arrive LBNL LBNL(*)
Thermometers (for pipes) 4 LakeShore arrive LBNL LBNL(*)
Thermometer block (Inside body) 5 Mirapro 12-Mar, '09 Osaka
Thermometer block (for pipes) 4 Mirapro 12-Mar, '09 Osaka
30 pin plug 1 Mirapro 12-Mar, '09 KEK
Heaters 2 LakeShore OK KEK
MLI - Kaneka OK KEK
(*) Thank Mike for supplying Cernoxes (Yoshitaka, Makoto and Shigeru)
Test Area will move to North-CH
Absorber Schedule
12-Mar MIRAPRO
Summary
(1) Ordering of the first absorber body was delayed 2-3 month from original expectation. It will make tight schedule of preparation and test at KEK.
(2) Thermometer/level sensors inside and outside absorber body were ordered by LBNL to save extra cost. Thanks again!
(3) Other parts will arrive at KEK by March-2009.
(4) Thin absorber flanges will be set at KEK. First flanges will be arrived from Univ.
of Mississippi.