thomas.shaffer@LIGO.ORG - posted 10:37, Thursday 08 June 2023 (70278)
Relocking notes
No movement of ETMY TMSY, ITMY seemed to help ou the ALS Y power flashes. The camera looked slightly clipped, so we tried moving PR3 again, and while it helped the COMM beatnote, it didn't help the ALSY flashes. Next we tried moving IM4 Y back to where it was the last lock acquisition, also no help. I next tried walking the ITMY and ETMY to see if that helped at all, no help, reverted.
I ran increase flashes again while I took time to think and it eventually locked somehow at 0.7. Turning on the WFS didn't improve this power at all unfortunately. I tried to move PR3 again to see if this would help, but it did not.
I offloaded the WFS and decided to just move on with the rest of initial alignment. Hopefully we can relock ALSY again afterware.
Locked ALS again after initial alignment. Powers: ALS Y = 0.74 ALS X =0.85 Comm beatntoe = -5.2 Diff = -8.7