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Entry  Mon Nov 19 14:59:48 2018, Chub, Update, VAC, Vent 81 
    Reply  Mon Nov 19 17:09:00 2018, Steve, Update, VAC, Vent 81 beforeVent82.pngvent81completed.png
       Reply  Mon Nov 19 22:01:50 2018, gautam, Update, VAC, Loose nut on valve IMG_7171.JPG
          Reply  Tue Nov 20 13:13:01 2018, gautam, Update, VAC, IMC alignment is okay 
       Reply  Mon Nov 26 15:58:48 2018, Steve, Update, VAC, Vent 81 
          Reply  Mon Nov 26 17:16:27 2018, gautam, Update, SUS, EY chamber work IMG_5251.JPG
          Reply  Thu Dec 20 10:28:43 2018, gautam, Update, VAC, Heavy doors back on for pumpdown 82 
Message ID: 14373     Entry time: Thu Dec 20 10:28:43 2018     In reply to: 14318
Author: gautam 
Type: Update 
Category: VAC 
Subject: Heavy doors back on for pumpdown 82 

[Chub, Koji, Gautam]

We replaced the EY and IOO chamber heavy doors by 10:10 am PST. Torquing was done first oen round at 25 ft-lb, next at 45 ft-lb (we trust the calibration on the torque wrench, but how reliable is this? And how important are these numbers in ensuring a smooth pumpdown?). All went smooth. The interior of the IOO chamber was found to be dirty when Koji ran a wipe along some surfaces.

For this pumpdown, we aren't so concerned with having the IFO in an operating state as we will certainly vent it again early next year. So we didn't follow the full close-up checklist.

Jon and Chub and Koji are working on starting the pumpdown now... In order to not have to wear laser safety goggles while we closed doors and pumped down, I turned off all the 1064nm lasers in the lab.

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