Reports until 16:42, Thursday 03 February 2022
H1 PSL (ISC, PSL)
craig.cahillane@LIGO.ORG - posted 16:42, Thursday 03 February 2022 (61607)
Light pipe opened at 2W, IMC locked and realigned
Jenne, Craig

We unlocked the light pipe and opened it.
We energized the rotation stage, set the rotation angle from the minimum power angle at -25 degrees to maximum at 10 degrees, and turned it back off.
Since there's only 1.7 watts going to the rotation stage now, this is sending 1.7 watts into the IMC.
(PSL team left the half wave plate after the PMC set such that only 1.7 watts can make it to the rotation stage)

We then set the PSL for science mode,
did some minor realignment with the IMC PZT,
and relocked.
The IMC WFS are currently doing their job, with about 1.5 milliwatts on IMC REFL DC.