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Reports until 21:56, Tuesday 08 July 2025
LHO General
ibrahim.abouelfettouh@LIGO.ORG - posted 21:56, Tuesday 08 July 2025 - last comment - 09:32, Wednesday 09 July 2025(85645)
OPS Eve Shift Summary

TITLE: 07/09 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 142Mpc
INCOMING OPERATOR: Corey
SHIFT SUMMARY:

IFO is in NLN and OBSERVING as of 03:01 UTC (1hr 45 min lock)

We spent roughly 2hrs and 40 min in OMC_WHITENING whilst damping violins since they were rung up by TFs that Oli and Jeff took in the morning and afternoon. Violins continue to decrease, reducing by about 1 order of magnitude strain throughout this shift.

Our range is somewhat low but I cannot see that this is due to squeezing since the trace is as low as it is when we are in FDS.

SDFs were accepted and are screenshotted.

LOG:

None

Images attached to this report
Comments related to this report
oli.patane@LIGO.ORG - 07:51, Wednesday 09 July 2025 (85647)

I've reverted the SR2 dackill time to 1200 (sdf)

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elenna.capote@LIGO.ORG - 09:32, Wednesday 09 July 2025 (85650)

Looks like a CSOFT Y gain was SDFed to a different value than the guardian sets it. My fault, I changed it while messing around with gains to avoid the 1 Hz instability and forgot to revert it. There were several other SDF diffs that did need to be accepted, so this one was missed.

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