1 Alan Bross MUTAC April 9, 2008 Lithium Hydride Absorber Program A. Bross for C. M. Lei.

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Presentation transcript:

1 Alan Bross MUTAC April 9, 2008 Lithium Hydride Absorber Program A. Bross for C. M. Lei

2 Alan Bross MUTAC April 9, 2008 We want to Procure:  An instrumented LiH disc (30 cm diameter, 4 cm thick) for measuring thermal properties  Two small (1.25” diameter X 0.25” thick) samples for radiation stability tests  One or Two LiH discs (50 cm diameter, 6.5 cm thick) u For use in MICE Step III.1 LiH Discs

3 Alan Bross MUTAC April 9, 2008 MICE Step III.1

4 Alan Bross MUTAC April 9, 2008  Only 1 vendor was found that would cast LiH u After some reflection (and some input from Chemists from Argonne Lab), the vendor decided casting LiH was too dangerous (production of H 2 gas)  Negotiating with Y12 to fabricate these discs. u We are also investigating if the UK equivalent (AWE, plc – Atomic Weapons Establishment) can help  Produced by Hot Isostatic Pressing (150 o C, 30,000 psi) u Will use existing mold  Final parts will be u Tested for Chemical composition and purity u Radio-graphed to ensure no voids u Machined to size u Dimensional inspection u Coated with epoxy completely Y12 National Security Complex

5 Alan Bross MUTAC April 9, 2008 Instrumental Disc 12 Blind holes for housing thermo-couples

6 Alan Bross MUTAC April 9, 2008 The Set Up of the Thermal Test Stainless steel base structure High temp glass ceramic High temp low k gasket 1” copper tube with heaters 12” dia steel ring Machined LiH disc Thermocouples X12 Foam board & gasket Flexible cooling tube

7 Alan Bross MUTAC April 9, 2008 The Set Up Ready for the Thermal Test

8 Alan Bross MUTAC April 9, 2008 A Couple of Quick Checks Heat Sink Check: A coil of Parflex flexible thermoplastic polyethylene tubing, (¼”OD, 0.04” wall) was wrapped around the steel ring; Chiller temperature was set at -10C; Steel ring temperature was at -1C. Heat Source Check: 3 kapton flex heaters with R=157 ohms were glued to the inside of the copper sleeve evenly; +123C was achieved on sleeve surface at applied voltage of 30V

9 Alan Bross MUTAC April 9, 2008 The Hardware Ready to take the Disc

10 Alan Bross MUTAC April 9, 2008 The MICE Energy Absorber The absorber is fastened by two M8 screws and nuts first. Carbon-fiber Clamp Shells LiH Disc (~ 10 kg)

11 Alan Bross MUTAC April 9, 2008 Installation in MICE This absorber is lowered down through the slot of the ss spool piece