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Reports until 17:41, Thursday 04 December 2025
H1 PSL
jason.oberling@LIGO.ORG - posted 17:41, Thursday 04 December 2025 (88368)
PSL Recovered After Power Outage

R. Short, P. Thomas, J. Oberling

We have recovered the PSL after today's power outage.  Some notes for the future:

I've attached a picture of the Settings table for PSL sensor calibration and operating hours for future reference.  Again, our persistent operating hours (that track total uptime of PSL laser components; OPHRS A in the attached picture) will continue to be wrong as we cannot update this value.  The current operating hours, which tracks operating hours of currently operating components (i.e. we've been running this specific NPRO for X hours; OPHRS in the attached picture) are correct.

We have the PMC and FSS RefCav locked, but have left the ISS OFF overnight while the PMC settles.  The PMC requires a beam alignment tweak (normal after an extended time off, like a 90 minute power outage) but we don't yet have Beckhoff so we don't have access to our picomotor mounts.  I'll tweak the beam alignment tomorrow once Beckhoff has been recovered.

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