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

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)

Absorber Test Cryostat & Test Absorber

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

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

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

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

Absorber Test Cryostat

MLI H2 TANK 2m3 (1.0-1.3 bar) ~1 L

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

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

Level Sensor Test Results

X100

X100

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

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

G-10 SupportAbsorber & Pipes

Mini In-Flange

30 PinFeedthrough

Tee

L-H2 IN

G-H2 OUT

He/N2 OUT

He/N2 IN

A-A’(22.5 deg.)G-H2 OUT

L-H2 IN

He/N2 OUT

He/N2 IN

Straight Pipes

Tee

30 PinFeedthrough

No-Transition

cut after welding

Mini In-Flange

G-10 SupportAbsorber & Pipes

Heater

L-H2 IN

LH2

IN/OUT

He

IN/OUT

Mini In-Flange; SS/Al joints

InIn

SS

AL

Mini Rotational Flange

If it needs rotation

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

30 Pin Feedthrough

In

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

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

(EXCEL FILE)

http://ishimotopc2.kek.jp/MICE-Instruments.xls

Thermometers in absorber

AC Bridge 370S

CX-1050-SD 3716; 16ch Scanner

LakeShore Cartridge Heater

Detail heater assemble for MICE absorber

STOPPER

HTR-25-100¼” Hole

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

(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