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Entry  Mon Oct 18 10:02:17 2021, Koji, Update, VAC, Vent Started / Completed Screen_Shot_2021-10-18_at_14.52.34.pngScreenshot_2021-10-18_15-08-59.png
    Reply  Tue Oct 19 10:59:09 2021, Koji, Update, VAC, Vent Started / Completed 
       Reply  Tue Oct 19 11:30:39 2021, Koji, Update, VAC, How to vent TP1 Screen_Shot_2021-10-18_at_14.52.34.png
          Reply  Wed Oct 20 15:58:27 2021, Koji, Update, VAC, How to vent TP1 
Message ID: 16410     Entry time: Mon Oct 18 10:02:17 2021     Reply to this: 16412
Author: Koji 
Type: Update 
Category: VAC 
Subject: Vent Started / Completed 

[Chub, Jordan, Anchal, Koji]

- Checked the main volume is isolated.
- TP1 and TP2 were made isolated from other volumes. Stopped TP1. Closed V4 to isolate TP1 from TP2.
- TP3 was made isolated. TP3 was stopped.
- We wanted to vent annuli, but it was not allowed as VA6 was open. We closed VA6 and vented the annuli with VAVEE.
- We wanted to vent the volume between VA6, V5, VM3, V7 together with TP1. So V7 was opened. This did not change the TP1 pressure (P2 = 1.7mmTorr) .
- We wanted to connect the TP1 volume with the main volume. But this was not allowed as TP1 was not rotating. We will vent TP1 through TP2 once the vent of the main volume is done.

- Satrted venting the main volume@Oct 18, 2021 9:45AM PDT

- We started from 10mTorr/min, and increased the vent speed to 200mTorr/min, 700mTorr/min, and now it is 1Torr/min @ 20Torr
- 280Torr @11:50AM
- 1atm  @~2PM


We wanted to vent TP1. We rerun the TP2 and tried to slowly introduce the air via TP2. But the interlock prevents the action.

Right now the magenta volume in the attachment is still ~1mTorr. Do we want to open the gate valves manually? Or stop the interlock process so that we can bypass it?

Attachment 1: Screen_Shot_2021-10-18_at_14.52.34.png  304 kB  Uploaded Mon Oct 18 15:57:32 2021  | Hide | Hide all
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Attachment 2: Screenshot_2021-10-18_15-08-59.png  84 kB  Uploaded Mon Oct 18 16:09:49 2021  | Hide | Hide all
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