corey.gray@LIGO.ORG - posted 07:51, Wednesday 02 July 2025 - last comment - 14:51, Wednesday 02 July 2025(85496)
Wed DAY Ops Transition
TITLE: 07/02 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Oli
CURRENT ENVIRONMENT:
SEI_ENV state: CALM
Wind: 15mph Gusts, 8mph 3min avg
Primary useism: 0.01 μm/s
Secondary useism: 0.05 μm/s
QUICK SUMMARY:
Rough night continues after Maintenance Day with rung up violins and input alignment shift.
NOTE: Well, after getting H1 back to 60W, the violins are not rung up and better than how they looked at the end of my shift yesterday.
(Sheila & Todd are now looking at the Squeezer & I returned H1 to be able to "Observe WITH Squeezing".)
I noticed ETMX mode1 has been high ever since coming back from maintenance yesterday and we usually don't damp this mode. I took a high res spectra to confirm that it was this mode and not another close line causing this and it was so I tried to find some damping settings.
Nothing worked all that well, some tentative new settings are FM1+FM2+FM10 G=-50.