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Entry  Tue Jul 24 18:32:33 2018, aaron, Cryostat, Vacuum, Zach's dewars are no good FillPort_Blank.SLDDRWFillPort_Blank.SLDPRT
    Reply  Mon Jul 30 14:17:58 2018, johannes, Cryostat, Vacuum, Zach's dewars are no good 
       Reply  Tue Jul 31 22:21:40 2018, aaron, Cryostat, Vacuum, Zach's dewars are no good 
Message ID: 2113     Entry time: Tue Jul 31 22:21:40 2018     In reply to: 2112
Author: aaron 
Type: Cryostat 
Category: Vacuum 
Subject: Zach's dewars are no good 

I asked GALCIT if they had time for it, they had quoted a similar part last year. Hopefully will have this vacuum option on a week scale.

Quote:

Protolabs offers cnc turning but the aspect ratio of the plate could make it weird for lathing. FYI protolabs also machined the bottom plate Adele used for the white dewar which worked fine, even though I messed up the finish and had them bead-blast it. Still pumped below 1e-5 torr without problems within a few hours. There's also plenty of sand paper left from her polishing the heat switch parts from grit 280 or so all the way up to 2000 if you want to give polishing it yourself a shot (obviously only for exposed areas, won't work in grooves)

 

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