Lithium Hydride Absorber Program C. M. Lei March 17, 2008.

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Presentation transcript:

Lithium Hydride Absorber Program C. M. Lei March 17, 2008

LiH Absorber Program2 An instrumented LiH disc (30 cm diameter, 4 cm thick) for measuring the thermal conductivity will be made. Two LiH discs (50 cm diameter, 6.5 cm thick) will be made as absorbers for use in MICE Step III.1 (first cooling measurement – no RF, 1 disk between upstream and downstream spectrometers) LiH Discs LiH Disk inside the Spool piece CalorimeterCerenkov Detector Time-of-flight Detector Solenoid

LiH Absorber Program3 Y ‑ 12 National Security Complex will be sub-contracted to fabricate these discs. It is located in East Tennessee, adjacent to Oak Ridge National Laboratory. A facility maintains the nation’s uranium and lithium technology base. Y ‑ 12 National Security Complex

LiH Absorber Program4 LiH Discs Fabrication Produced by Hot Isostatic Pressing Produced using existing mold design Tested by chemistry X-Rayed by Radiography to ensure no voids Machined to size Dimensional inspection Coated with epoxy completely (needed to be finalized) Packaged in drum type container Shipped to FermiLab by Fed-X HIP: the simultaneous application of heat and high pressure. A high temperature furnace is enclosed in a pressure vessel. Work pieces are heated and an inert gas, generally argon, applies uniform pressure.

LiH Absorber Program5 Manufacturing Drawings for the Discs 12 Blind holes for housing thermo-couples

LiH Absorber Program6 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

LiH Absorber Program7 The Set Up Ready for the Thermal Test

LiH Absorber Program8 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

LiH Absorber Program9 The Hardware Ready to take the Disc Glove bag with inert gas flowing during the handling and testing processes

LiH Absorber Program10 The MICE Energy Absorber The absorber is fastened by two M8 screws and nuts first. Carbon-fiber Clamp Shells LiH Disc (~ 10 kg)

LiH Absorber Program11 The Supporting Tube Carbon fiber tubing 8 mm OD, 1 mm wall M8 threaded insert to be glued with the tubing (aluminum or G10)

LiH Absorber Program12 Conceptual Installation This absorber is lowered down through the slot of the ss spool piece

LiH Absorber Program13 Conceptual Design of the End Cover A saddle with a level platform may be developed to provide a reliable vacuum seal Carbon-fiber tubing Blind cover with carbon fiber tubing attachments (FNAL Design?)