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Entry  Mon May 24 15:47:30 2021, Radhika, DailyProgress, Cryo vacuum chamber, Weekend cryo chamber cooling cooling.png
    Reply  Mon May 24 16:49:17 2021, rana, DailyProgress, Cryo vacuum chamber, Weekend cryo chamber cooling PPP.jpg
       Reply  Tue May 25 13:19:41 2021, Radhika, DailyProgress, Cryo vacuum chamber, Weekend cryo chamber cooling 
    Reply  Tue May 25 16:38:17 2021, Stephen, DailyProgress, Cryo vacuum chamber, Weekend cryo chamber cooling --> started warmup cooling_full_20210525.png
       Reply  Thu May 27 16:48:35 2021, Radhika, DailyProgress, Cryo vacuum chamber, Weekend cryo chamber cooling --> started warmup 7x
          Reply  Mon May 31 11:38:13 2021, Radhika, DailyProgress, Cryo vacuum chamber, Weekend cryo chamber cooling 14x
             Reply  Wed Jun 2 20:06:07 2021, rana, DailyProgress, Cryo vacuum chamber, Weekend cryo chamber cooling 
Message ID: 2581     Entry time: Wed Jun 2 20:06:07 2021     In reply to: 2580
Author: rana 
Type: DailyProgress 
Category: Cryo vacuum chamber 
Subject: Weekend cryo chamber cooling 

I'll be curious to see the results of Radhika's thermal model - I am suspicious of this thermal strap contact to the base plate. It would be good if we could instead make a copper mating plate:

  1. groovy milled out loop holder for the strap to go into such that the contact surface is larger
  2. flat base to get smushed into the colde plate
  3. thru holes so that it can be directly screwed down with some washers
  4. screwed down with a torque wrench so that we know that its really tight (i.e. "I think its pretty tight" doesn't really work when we want a good thermal contact)
  5. someone with a MechE degree calculates the proper torque such that we plasticly deform the copper and get it to sit more flush to the cold plate
  6. a cap for the copper plate that really smooshes the copper strap into the bottom part of the mating plate.
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