40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log  Not logged in ELOG logo
Message ID: 16777     Entry time: Thu Apr 14 09:04:30 2022
Author: Jordan 
Type: Update 
Category: VAC 
Subject: RGA Volume RGA Scans 

Prior to venting the RGA volume on Tuesday (4/12/2022) I took an RGA scan of the volume to be vented (RGA+TP1 volume+Manual Gate Valve) to see if there was a difference after replacing the manual gate valve. Attached is the plot from 4/12/22, and an overlay plot to complare 4/12/22 to 12/10/2021, when the same volume was scanned with the old (defective) manual gate valve.

There is a significant drop in the ratio O2 compared the the nitrogen peak and reduced Argon (AMU 40) which indicates there is no longer a large air leak.

12/10/21 N2/O2 ratio ~ 4 (Air 78%N2 / 21%O2)

4/12/22 N2/O2 ratio ~ 10      

There is one significant (above noise level) peak above AMU 46, which is at AMU 58. This could possibly be acetone (AMU 43 and 58) but overall the new RGA Volume scans look significantly better after the manual gate valve replacement. Well done!

Attachment 1: 40mRGA_Overlay.pdf  25 kB  Uploaded Thu Apr 14 10:14:53 2022  | Hide | Hide all
40mRGA_Overlay.pdf
Attachment 2: RGAVolume_4_12_22.PNG  123 kB  Uploaded Thu Apr 14 10:15:13 2022  | Hide | Hide all
RGAVolume_4_12_22.PNG
ELOG V3.1.3-