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Message ID: 2428     Entry time: Wed Oct 9 17:40:57 2019
Author: Raymond, Chris, Duo 
Type: DailyProgress 
Category: Cryo vacuum chamber 
Subject: Closing the vacuum chamber 

We closed the chamber without installing the radiation shields or cold plate in order to test the vacuum pressure of the empty system. Upon turning on the backing pump there was a fine oil mist from exhaust port, so the pump was turned off and an oil trap/filter has been purchased. 

It was estimated that 12 inch/pound of torque is required for each of the top plate bolts in order to compress the 75 Shore hardness Viton o-ring by 20% (recommended by O'Hanlon). 

 

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