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.