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Absorber R&D and Instrumentation
MICE Meeting at FNAL, Jun 8-11, 2006
Shigeru Ishimoto KEK
and MICE Japan
“Sakuraso” Japanese Primula and Green House
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L-H2 Level Sensor CX-1050-SD
MICE Absorber (present version)
2-HeatersHTR-25-100
L-H2 IN
L-H2 OUT
Room Temp. Magnet Bore L-He/N2 OUT
L-He/N2 IN
ThermometersCX-1050-SD
(20 L)
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Absorber Test Cryostat & Test Absorber
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Condenser & Level Sensor
1.27 L
4-KF16
KF16
18
, t1.
0、
L=
108
.5
KF16-LONG
BRAZING
1.27 L
4-KF16
KF16
18
, t1.
0、
L=
108
.5
KF16-LONG
KF40L=100KF40
KF40 L=100 Pipe
For Test (0.2 L)
192
48 pin feedthrough on KF40
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L-H2/LHe Level sensor in absorber
CX-1050-SD
DC ~mA
V4
V3
DC Current for L-H2/LHe should be optimized (KEK R&D).
LHeLH2
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LH2/He Level Sensor
KF40 + 48 pin feedthrough
KF40 L=100
Extension Tube
CX-1050-SDX5
(serial)
CX-1050-SDX1 calibrated
(4 wires)
2 cm
2 cm
2 cm
2 cm
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LH2 Condenser
LH2 IN/OUT
Heat Links
Cryocooler & Condenser
Condenser Heater
HTR-25-100 (100W)
LH2/He Level Sensor
In Extension
KF40 + 48 pin feedthrough
1st stage
2nd stage
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Absorber Test Cryostat
MLI H2 TANK 2m3 (1.0-1.3 bar) ~1 L
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LakeShore 218S
Keithley 2700 DMM
Cernox x8
MKS 0-2000 Torr
Level #1-5
VAC. Gauge . . .
MONITOR (LabView)
Shoji Suzuki
LakeShore 218 Keithley 2700 DMM
Absorber DAQ System
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0.368 l/h (3.23 W)
(MICE; 57 hr for 20 l)
0.20 l/h (1.77 W)
Cryocooler OFF
Cryostat Test Results
4 hrs; 300K 20 K
Empty
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Level Sensor Test Results
X100
X100
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L-H2 Level Sensor Test
~ 3 mW each
~ 0.75 mW
~ 0.2 mW
Good linearity in L-H2
It will be tested in gas phase
Thermometer 0.01mA
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Changed or new parts• Transition Joint Mini flange with In-seal• G-10 support of absorber & pipes• 30 pin feedthrough at LH2 Inlet pipe• L-He IN & OUT; straight pipes• Assemble & welding method of pipes
Revision of Absorber Parts
Effect of cryocooler selection
Smaller packing size
Easy setup
Wiring path near absorber
Remove risk of transition joint
Accuracy of pipe assemble
Motivation
1 more joint between cryocooler and absorber without transition joint
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G-10 SupportAbsorber & Pipes
Mini In-Flange
30 PinFeedthrough
Tee
L-H2 IN
G-H2 OUT
He/N2 OUT
He/N2 IN
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A-A’(22.5 deg.)G-H2 OUT
L-H2 IN
He/N2 OUT
He/N2 IN
Straight Pipes
Tee
30 PinFeedthrough
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No-Transition
cut after welding
Mini In-Flange
G-10 SupportAbsorber & Pipes
Heater
L-H2 IN
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LH2
IN/OUT
He
IN/OUT
Mini In-Flange; SS/Al joints
InIn
SS
AL
Mini Rotational Flange
If it needs rotation
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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
G-10 Support
From Absorber
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30 Pin Feedthrough
In
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Wiring of thermometers, level
sensor & heaters
4 wires measurement for thermometers and heaters
LakeShare x2 218S Max. 16 Cernox
6 for absorber (2 on top ) 5
8 wires for level sensors
Total 32 wires inside absorber 28
2 for windows
2 for LH2 pipes
2 for C-He pipes
3 for Cryocooler 2
1 for magnet bore
3 heaters
Total 52 wires in vacuum
30 PinFeedthrough
48 PinFeedthroughat Vacuum
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PC / WS
MICE absorber monitor/control (plan)
IEEE-488
Keithley/ADCAC Bridge 370S DCPS
READ OUTS
16 CX-1050SD’s
DMR 1-6
3-HTR5-CX-1050
P&VAC&LEVEL Sensors
Abs. HTR-UP
CRYOCOOL HTR
Programmable Controller or LOGIC
DIO
ALRAM, VALVES, CRYOCOOLER-OFF, HEATER-OFF…
DCPS DCPS
Abs. HTR-DWN
LAN
Abs. LEVELCX-1050
cc1mA
DIRECT CONTROL
CRYOSTAT
Inside Abs.
Contacts
2CH
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(EXCEL FILE)
http://ishimotopc2.kek.jp/MICE-Instruments.xls
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Thermometers in absorber
AC Bridge 370S
CX-1050-SD 3716; 16ch Scanner
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LakeShore Cartridge Heater
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Detail heater assemble for MICE absorber
STOPPER
HTR-25-100¼” Hole
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Digital meter relay for MICE Absorber/Cryocooler
DMR; DIGITAL METER RELAY (Digital comparator) Watanabe (Japan) for example
INPUTWSM-452HR-R3NNNX-22VD ; DC 0-199.99 mVWSM-452HR-R3NNNX-32VD ; DC 0-1.9999 VWSM-452HR-R3NNNX-42VD ; DC 0-19.999 VWSM-452HR-R3NNNX-52VD ; DC 0-199.99 V
OUTPUT( 4.5 digit set)HI-relay (NC, HO)LO-relay (NC, NO)
Scaling; A-B (V) C-D (Unit)
DC24V
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(1) Absorber R&D at KEK
- Level sensor test is going
- Absorber L-H2 cooling will start soon
(2) Revision of Absorber Parts
- New parts - - - Mini In-Flanges, G-10, feedthrough, tee …
- Pipe assemble, installation tools
(3) Absorber Instrumentation Detail
- Selection of Cernox read out, with or without heater control
- Needs monitor/control program
Summary