# Presentation: 268655

## Lithium Hydride Absorber Program

- C. M. Lei
- March 17, 2008

##           LiH Discs

- 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

- Calorimeter

- Cerenkov Detector

- Time-of-flight Detector

- Solenoid

- LiH Absorber Program

##                Y‐12 National Security Complex 

- 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 Program

##                LiH Discs Fabrication

-                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 Program

## Manufacturing Drawings for the Discs

- 12 Blind holes for housing thermo-couples

- LiH Absorber Program

##                   The Set Up of the Thermal Test

-                   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 Program

## The Set Up Ready for the Thermal Test

- _The Set Up Ready for the Thermal Test_

- LiH Absorber Program

##                      A Couple of Quick Checks

-                      A Couple of Quick Checks

- Heat Sink Check:
- A coil of Parflex flexible thermoplastic polyethylene tubing,  (1⁄4”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 Program

##                      The Hardware Ready to take the Disc

-                      The Hardware Ready to take the Disc

- Glove bag with inert gas flowing during the handling and testing processes

- LiH Absorber Program

##                      The MICE Energy Absorber

-                      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 Program

##                      The Supporting Tube

-                      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 Program

##                      Conceptual Installation

-                      Conceptual Installation

- This absorber is lowered down through the slot of the ss spool piece

- LiH Absorber Program

##                      Conceptual Design of the End Cover

-                      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?)

- LiH Absorber Program