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Liquid H 2 Absorber Production Contents (1)MICE Absorber Status (2)MICE Absorber Modification (3)Plan/Schedule (4)Summary MICE CM-23 in HARBIN Shigeru.

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Presentation on theme: "Liquid H 2 Absorber Production Contents (1)MICE Absorber Status (2)MICE Absorber Modification (3)Plan/Schedule (4)Summary MICE CM-23 in HARBIN Shigeru."— Presentation transcript:

1 Liquid H 2 Absorber Production Contents (1)MICE Absorber Status (2)MICE Absorber Modification (3)Plan/Schedule (4)Summary MICE CM-23 in HARBIN Shigeru Ishimoto KEK MICE CM-24, May 31 - June 3, RAL

2 New Absorber Test Area ( KEK North Counter-Hall ) Test Cryostat 2 m3 G-H2 Tank OLD K2K BEAM LINE

3 machining after welding 2 heater 2 test windows 4 Mini-flanges

4 Absorber at MIRAPRO ( Mar-13 th, 2009 ) 368 mm Error

5 Absorber at MIRAPRO ( Feedthrough and Parts ) G-10 Support Parts L-H2 In and 30 Pin Feedthrough

6 Absorber at MIRAPRO ( Thanks MIRAPRO Technician and Engineer ) Mr. Nakamura Aluminum Welding Expert

7 Absorber at MIRAPRO ( He Leak Test ) No He Leak

8 Absorber at MIRAPRO ( Pressure Test at 3.0 bar ) No N2 Leak at 3.0 bar

9 Temperature & Level Sensors in the Absorber 10X2 = 20 wires In L-H2 in G-H2 2 wires; 5 Thermometers I T = 0.1 mA 2 wires; 5 Level sensors I L = 0.5 or 1.0 mA (Total ; 20 wires) 10 Cernox 1050-SD Calibrated K (Supplied by LBNL)

10 Sensor and Heater ( Overall ) HTR-25  -100W X2 = 20 D=1/4”

11 Level Sensor Current

12 Absorber Assemble Sensor Blocks Cable in groove soft solder and shrink tubes Cernox 1050-SD

13 Absorber Assemble Aluminum Punching Board t=0.5 mm Aluminum Plates t=1 mm 5 Sensor Blocks

14 Absorber Assemble Thermometer Blocks x4 Heaters x2 Connecter x2 L-H2 IN and 30 Pin Connecter L-H2 OUT

15 Absorber Assemble G-10 Support x8 M.L.I. L-H2 IN

16 Absorber Assemble L-H2 IN Connecter x2

17 bobbin Thermal radiation shield Magnet cryostat Large End Flange This solution is to shift the absorber upstream by 10.4mm 0.4mm Large End Flange locally thinned down to 2.5 mm AFC Magnet Problem ( Slide by Wing Lau ) Solution 1 25  35 mm

18 AFC with ABSORBER Modification Plan Too Narrow Points Off Center 10.4 mm

19 M.L.I. t=3 AFC with ABSORBER Modification Plan Too Narrow Points Off Center 10.4 mm

20 AFC with ABSORBER Modification Plan Too Narrow Points Absorber Support Flange on MAGNET CRYOSTAT

21 AFC with ABSORBER & Large End Flange Absorber Support Flange on MAGNET CRYOSTAT Too Narrow Points

22 Cut 4 Pipes at +5 mm Line 4 New Elbows; mm Horizontal ( ) + 5 mm Vertical 368 mm Pipes Extension Plan

23 mm 4 New Elbows

24 Disassembled ! ! ( May 20 th, 2009 at KEK ) Cut Here (+5 mm Line)

25 Absorber Schedule Absorber Body-#1 Schedule was 3 month delayed due to pipes modification. Absorber Body-#2 will be ordered on Jul-Aug Absorber Body-#3 will be ordered in FY2010 in Japan.

26 Summary (1)The first absorber body was successfully fabricated and tested by MIRAPRO. The absorber arrived at KEK on Mar-18 th at KEK. (2)Absorber body assemble was finished at KEK temporally. (3)Test cryostat preparation and DAQ programming are in progress. (4)Absorber parts are disassembled to extend 4 pipes mm. This solution was accepted by the MICE-TB on May-18th. (5)We need enough space at large end flange to minimize risk of heat leaks. (6)Absorber needs a support structure on the magnet cryostat. (7)Schedule; Absorber Body-#1 Schedule was 3 month delayed due to pipes modification. Absorber Body-#2 will be ordered on Jul-Aug Absorber Body-#3 will be ordered in FY2010 in Japan.


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