TITLE: 07/09 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Tony
SHIFT SUMMARY: Relocking and currently in INJECT_SQUEEZING, and weirdly we had been stuck in LASER_NOISE_SUPPRESSION for over 10 minutes. It looks like IMC_LOCK stalled in OPEN_ISS and was just sitting there. I reselected ISS_ON and it eventually arrived there and we were able to move on to ADS_TO_CAMERAS
Had some trouble getting DRMI to lock this last lockloss and it ended up going through PRMI, even after an initial alignment and then a partial initial alignment where I just did PRC, MICH, and SRC. Other than that, relocking has been smooth. I didn't get a chance to look into the two locklosses that happened during my shift, but I know they weren't caused by wind or ground motion.
LOG:
23:00 Detector Observing at 155Mpc and has been Locked for almost 6 hours
01:46 Lockloss
02:55 NOMINAL_LOW_NOISE
02:57 Observing
05:52 Lockloss
- I started an initial alignment
- While INIT_ALIGN was trying to lock ALSY we had EY and TMSY saturations
06:16 IA done, relocking
06:30 Lockloss from ACQUIRE_DRMI_1F (possible that it was due to me moving BS?)
06:37 Lockloss from ACQUIRE_DRMI_1F
06:37 I took us to manual initial alignment so I could align PRC, MICH and SRC in case I had misaligned them?
06:49 Partial IA done, trying relocking again