oli.patane@LIGO.ORG - posted 16:35, Thursday 30 October 2025 - last comment - 17:40, Thursday 30 October 2025(87873)
Ops EVE Shift Start
TITLE: 10/30 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Corrective Maintenance
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
SEI_ENV state: CALM
Wind: 10mph Gusts, 6mph 3min avg
Primary useism: 0.04 μm/s
Secondary useism: 0.43 μm/s
QUICK SUMMARY:
Right up about to get back to NLN, had to turn the Hi gains on, we were doing well but then just lost lock right after CLOSE_BEAM_DIVERTERS, suspiciously like what was happening on Tuesday (87826).
00:38 UTC Back to Observing. I stepped one-by-one through the states above LASER_NOISE_SUPPRESSION, pausing in between each state and turning the Hi ASC gains on/off as needed, and we were fine and didn't lose lock.