ryan.short@LIGO.ORG - posted 20:24, Saturday 15 March 2025 - last comment - 20:29, Saturday 15 March 2025(83391)
H1 Back to Observing (after two SQZ angle resets)
After 14 hours of downtime, the winds have died down enough to allow H1 to lock and resume observing as of 03:17 UTC. Spent a few extra minutes in OMC_WHITENING to damp down some slightly rung-up violin modes.
As has been happening in the past few lock acquisitions, a few minutes after reaching NLN, the SQZ angle servo railed, so I reset it with SQZ_MANAGER and started observing. Tagging SQZ
...as I was typing this the SQZ angle railed again, so I again reset it. Out of observing for one minute starting at 03:21 UTC.
Servo railed a third time at 03:25 UTC, so I dropped observing and instead of resetting the SQZ angle to 190 like SQZ_MANAGER does, I set it to 170 to see if giving the servo more headroom helps at all. Back to observing at 03:27 UTC.