Reports until 05:17, Saturday 17 June 2023
H1 General (ISC)
austin.jennings@LIGO.ORG - posted 05:17, Saturday 17 June 2023 (70542)
PR3 Movement Long and Short Term

I have trended the top mass OSEM inmon channels, the optic align offsets, and the FMCS temps for zone 1A and zone 5, both over short term (~3 weeks, around the start of the excursion), and over a couple of months. From looking at the plots over the long term and after recovery, most OSEM and optic align readouts are relatively where they were before the excursion EXCEPT for DAMP_P_INMON and DAMP_V_INMON. Looking at the scopes, the DAMP_P was ~ -650 counts before the excursion and is now hovering around -640. DAMP_V seems to have had the biggest change, coming from ~32 before the excursion to roughly 50 today. In principal, this makes sense, since temperature swings mostly affects suspensions in the vertical direction, P and V. This is direct evidence that the OSEM vertical sensors are definitely not in the alignment they were before, but the rest for the most part have been restored to their original values.

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