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Entry  Fri Sep 22 18:38:15 2017, awade, DailyProgress, Vacuum, Baking bake chamber 2017-09-22_18.16.42.jpg
    Reply  Thu Sep 28 21:15:12 2017, awade, DailyProgress, Vacuum, Cleaning refcav Au coated heat shields 13x
       Reply  Fri Sep 29 20:06:21 2017, awade, DailyProgress, Vacuum, Cleaning refcav Au coated heat shields 2017-09-29_19.36.57.jpg2017-09-29_19.33.34.jpg
          Reply  Sat Sep 30 17:09:03 2017, awade, DailyProgress, Vacuum, Cleaning refcav Au coated heat shields 
Message ID: 1933     Entry time: Fri Sep 22 18:38:15 2017     Reply to this: 1934
Author: awade 
Type: DailyProgress 
Category: Vacuum 
Subject: Baking bake chamber 

I'm now preparing the bake rig for baking the ref cavity shields.  

I've cleaned out the inside of the bake rig vacuum chamber with some clean fabric wipes and methanol.  The setup is out in the hall to avoid stinking out the lab.  The vacuum pump has been hooked up and is pumping.  I've used a AC heating strap wrapped around the chamber and used cooking grade aluminum foil as crude insulation to help with heat build up. To control temperature I have a variac salvaged from the EE workshop broken pile (only thing wrong was a loose knob). To monitor temperature a thermocouple is taped on with Kapton tape to sense temperature.

The rig has reached 120 C in 15 minutes and I'm now adjusting the variac percentage of total power to give something stable around 100 C.   

Will bake for a few hours and then let cool overnight.

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