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ligo-ex
ligo-ds
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| Richardson Lab Experimental Log |
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Message ID: 218
Entry time: Thu Aug 31 12:56:29 2023
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| Author: |
Aiden |
| Type: |
Update |
| Category: |
VAC |
| Subject: |
Vacuum Chamber Baking Update |
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| Took some more RGA data to see if the HC levels have further declined since bake 4 and it seems that it has started to plateau with August 29 160.7 e-10 Torrl/s and August 31 giving 158.4 e-10 Torrl/s. The pressure of the chamber before taking data was 5.1 e-8 Torr. I have attached an overlay of the data from August 29 and August 31. It seems that the extra two days has not noticeably changed the data and another bake will most likely be needed to meet LIGO's HC specifications. The pressure after leaving the RGA off for a bit was 5.9 e-8 torr and it was still slowly decreasing. |
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