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 KEK MICE CM23, HIT in Harbin China, 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=1 Screws on AFC Magnet SS 15.7 AL 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: mm
Flange-Body Tolerance In 1.0 Gap 0.5
Prototype absorber test at KEK
10 Cernox 1050SD Calibrated K 4 wires; AB101, 102, 105, 109,110 2 wires; AB103,104,106,107,108 (Total 5*4 + 5*2 = 30 wires) I m =0.1 mA; 101,103,105,107,109 I m =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 or 4 x 0.14 mm2 ETFE cable X 5 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 set
Status of Absorber parts (*) 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 (4)Thin absorber flanges will be set at KEK. First flanges will be arrived from Univ. of Mississippi.