Reports until 14:48, Tuesday 22 April 2025
H1 PSL
ryan.short@LIGO.ORG - posted 14:48, Tuesday 22 April 2025 (84063)
PSL PMC and RefCav Alignment Tweaks

Now that we have restored PSL picomotor functionality by moving them to their own driver, I took the time this afternoon to touch up alignment into the PMC and RefCav as they had been declining. For the PMC, with the ISS off, my adjustments went as follows:

It's possible there's still more pitch adjustment that could be tried here as seen by the PMC REFL camera, but I was no longer seeing improvement while doing my adjustments.

After turning the ISS back on and ensuring it was diffracting about 4%, my RefCav adjustment followed:

Decent improvements all around. I've attached a snapshot of the quad display for reference after my alignment was complete.

Images attached to this report