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Reports until 17:14, Friday 18 November 2022
H1 ISC (CSWG, DetChar, ISC, SEI, SQZ, SUS)
jeffrey.kissel@LIGO.ORG - posted 17:14, Friday 18 November 2022 (65879)
A Moment of Quiet Time
J. Kissel for everyone who's asking:

We've gathered a bit of "quiet time" when no one was touching the IFO, just after a broadband PCAL injection to test the state of the calibration.

Start:
    2022-Nov-19 00:35:30 UTC
    2022-Nov-18 16:35:30 PST
    1352853348

End: 
    2022-Nov-19 00:45:30 UTC
    2022-Nov-18 16:45:30 PST
    1352853948

There's far too many folks here for me to summarize the current state of the IFO beyond what I know, but this is supposed to be a time period that we can compare to time prior to the Sep/Oct 2022 vent.
    - Well thermalized, having been locked for hours
    - 50.2 W into the IMC, 47.6 W into PRM
    - DARM drive is all ETMX
    - The PUM drivers are in State 1
    - No Squeezing
    - Still the same "fudges" to the calibration from LHO:64316

BUT, now
    - No HAM5/6 Septum window
    - Some "test" configuration of the EX electrical grounding situation

The broadband PCAL injection (again with no updates to the calibration) taken just prior to this quite time lives here:
     /ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O3/H1/Measurements/FullIFOSensingTFs/2022-11-19_H1_PCALY2DARMTF_BB.xml
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