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Reports until 17:31, Wednesday 16 October 2024
H1 ISC
corey.gray@LIGO.ORG - posted 17:31, Wednesday 16 October 2024 - last comment - 18:11, Wednesday 16 October 2024(80720)
ASC Lockloss During LOWNOISE ASC to LOWNOISE ESD ETMX

H1's had a bit of a rough go the last day(s). 
Just had a lockloss at LOWNOISE_ESD_ETMX with ASC signals getting noisy over 2-min prior to the lockloss (see attached for a look at the lead-up to the lockloss, with a burst seen on the Error Signals [mainly MICH P & Y] and then the slow ring-up for several ASC channels [with CHARD & CSOFT pitch signals being noticeable culprits].  Additionally, the PR GAIN channel also rung up with ASC.).

For the next lock, I'll pause at MAX POWER to see if this helps, and then watch ASC when stepping through next steps.

(Additionally--around the lockloss there was an earthquake bump (0.03-0.1Hz) around that time, AND we are also riding through increased winds for the last 3hrs...but they seem to be slowly calming down).

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corey.gray@LIGO.ORG - 18:11, Wednesday 16 October 2024 (80721)

Paused for ~1min for the states around where that last lockloss was.  Saw no signals ringing up.  Eventually made it to NLN.  Violins are high (but atleast they are still on nuc30's DARM plot (at 1e-15) and appear to be slowly coming down on nuc31's DCPD scope.

It also should be mentioned, environmentally, no earthquakes and the winds have drastically calmed down in the last 30min.  (But really all the environmental noisiness does not seem too crazy or bad....so perhaps H1, for some reason, is more susceptible/sensitive to seismic noise?)

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