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Reports until 09:40, Monday 22 September 2025
H1 PSL
ryan.short@LIGO.ORG - posted 09:40, Monday 22 September 2025 (87058)
PSL 10-Day Trends

FAMIS 31104

In general, things in the PSL are looking good after everything done following the power outage a couple weeks ago. There have been a few incursions in the PSL enclosure over the past week, the most consequential being last Tuesday's FSS path tuneup (alog86972). The biggest difference after that is the reading of the FSS TPD (a gauge of RefCav transmission) is now much lower as a result of recalibrating that PD, so this new reading of ~0.54 V can be considered our new "good" level.

ISS diffracted power has been on the rise for some reason; I'll keep an eye on this and check it when H1 is next out of lock. This could be a result of AMP2 output power having come back up slightly after the last incursion and things settling out.

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