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Message ID: 488     Entry time: Thu Dec 12 13:06:39 2024
Author: Luis 
Type: Update 
Category: VAC 
Subject: RGA Scan and vacuum system updates 

[Luis, Luke]

RGA Volume: T = 21°C, P = 1.74e-9 Torr
Main Volume: T = 22°C, P = 5.60e-9 Torr

We performed an RGA scan of the system. As we can see, we met cleanliness standards. The S/N ratio was roughly calculated and it is about 100. I will update the code to make this calculation and to have it displayed on the plot in the next scan we perform.

After this, we closed the RGA to the main volume valve, degassed the filament, and after the pressure came down to what it was initially, we reopened the valve. After the degassing, we took another scan. The overlaid plots are attached below.

The noise floor seemed to be about the same. I will take another scan tomorrow to verify whether it was the same or if the system just needed a little more time to be completely clean.

Attachment 1: 2024-12-12_PostBake2_ArC.png  278 kB  | Show | Hide all | Show all
Attachment 2: 2024-12-12_PostBake2_ArO_overlay.png  390 kB  | Hide | Hide all | Show all
2024-12-12_PostBake2_ArO_overlay.png
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