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Reports until 15:11, Monday 01 May 2023
H1 ISC (SUS, TCS)
ryan.crouch@LIGO.ORG - posted 15:11, Monday 01 May 2023 - last comment - 17:10, Tuesday 02 May 2023(69218)
SUS ETMX/ETMY PI SDF channels unmonitored

I've unmonitored the SUSETMX/YPI SWITCH channels at Vicky's request

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victoriaa.xu@LIGO.ORG - 15:13, Monday 01 May 2023 (69219)OpsInfo

I don't think we need PI damping most of the time now as TCS has settled, so I am minimalizing the SUS_PI guardian code to only start ESD damping if necessary. The following changes have been made to SUS_PI guardian; if all is good we can remove SUS_PI from ISC_LOCK soon.

  • Increased trigger thresholds for the RMS monitors of PI modes 24, 31, 29. Hopefully OMC glitches will not trigger PI DAMPING..
  • SUS_PI GRD will now also only turn on ETM{X,Y}_PI_ESD drivers if rms monitors have been triggered. 

The guardian reload kicked us out of "OBSERVING", because SUS_PI guardian was not "OK" for about 60ms as it reloaded, see trends.

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victoriaa.xu@LIGO.ORG - 17:10, Tuesday 02 May 2023 (69271)

Camilla, Vicky. We've increased the PI damping thresholds to: mode24 @ RMSMON = 10, mode31 @ RMSMON = 12.

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