camilla.compton@LIGO.ORG - posted 09:06, Sunday 29 October 2023 - last comment - 11:21, Sunday 29 October 2023(73818)
Lockloss at 16:01UTC
After 3h56 at NLN. 1382630509 this is the longest lock we've had in 24 hours.
Similar glitches in DARM/ETMX in the 750ms before lockloss, see attached and compare to 73817, 73578, 73539.
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After 4 locklosses at LOCKING_ALS, started initial alignment at 16:38UTC, finished at 16:58UTC. We had to go though PRMI locking even after initial alignment. NLN at 17:52UTC. Observing at 18:16UTC (24 minutes for ADS to converge).
High frequency SQZ is again 73798 starting bad, with DARM > 3kHz worse than NO_SQZ. Touched OPO temperature, attached, didn't help.
In this lock and the last I turned off ITMY Mode 8 gain as Ryan did 73812 as it is slowly ringing up, tagging SUS.
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