edmond.merilh@LIGO.ORG - posted 22:44, Sunday 18 August 2019 (51375)
Lockloss and recovery 03:04
- Slight retouch on X Arm
- Y Arm needed much more help - was able to recover alignment
- had a rather tough time with manual PRMI to bring it to a poinmt that ASC could take it
- DRMI was unseuccessful - back to PRMI
- Lock failed at ENGAGE_ACS_FOR_FULL_IFO - error signals didn't look bad...hmm. Perhapes I'll let it "cook" for a bit
- next attempt had lockloss trying to acquire DRMI - broke IMC for a bit
- Acquire DRMI broke the IMC again
- relocking IMC - cleared WFS and reset PZTs - WFS are steering it
- I think newly centered IMC spot looks pretty good - trying the re-lock again.
- DRMI caught - ASC drove it right into the ground while OMs were railing
- DRMI locked again and OMs ok this time - ASC not acting destructive
- NLN 5:41UTC
- Accepted new PZT alignment diffs for IMC - ALSEX, ALSEY, and MC3 all had accuracy diffs I acceoted as well
- 5:42UTC H1 Observing - WHEW!
Images attached to this report
