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Mounting the Cobalt

Notes:

Procedure:

  1. The cobalt is mounted on a copper puck with a threaded M3 hole on the bottom.

  2. Clean the bottom of the copper puck, (the side that will come into contact with the MC plate) and spread an ultra thin layer of vacuum grease on the bottom. During this process, take care not to damage the cobalt crystal.

  3. Attach the copper puck to the center of the mixing chamber plate by passing an M3 screw through a washer and then through the larger M4 hole. Attach the puck to the end of the screw.

  4. Align the cobalt with a fixed object outside the cryostat, and away from any of the four legs of the cryostat. And measure the height of the crystal from the floor, the height should be about 40.5''. This can be most easily done by mounting a laser to the fixed object and leaving it there until the system begins to cool.

  5. Holding the alignment, tighten down the cobalt to get good thermal contact.


next up previous contents
Next: Mounting the PMTs Up: Base Temperature Test Previous: Base Temperature Test   Contents
Jonathan Ouellet 2014-08-26