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Reports until 01:09, Thursday 09 January 2020
H1 General
camilla.compton@LIGO.ORG - posted 01:09, Thursday 09 January 2020 - last comment - 10:36, Thursday 09 January 2020(54380)
H1 Lockloss 08:48 UTC

Lockloss from a 6.3M EQ in Russia (not far from Alaska) knocked us out of lock fast from EQ mode. 0.03-0.1Hz band nearly touching 20μm/s. Waiting for the ground to calm a little before attempting relocking.

Comments related to this report
camilla.compton@LIGO.ORG - 03:29, Thursday 09 January 2020 (54381)GRD
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  • 10:55 NLN
    • I had to offload the TMS offsets from H1:SUS-TMS{X/Y}_M1_TEST_{P/Y}_OFFSET to H1:SUS-TMS{X/Y}_M1_OPTICALIGN_{P/Y}_OFFSET as I did with TJ this morning (alog 54364), and it sounds like Jeff and Cheryl did this afternoon (alog 54376). So I think somewhere in the guardian they arn't being offloaded correctly (tagging GRD).
    • I then turned off the TMS test offsets before reverting them (and the ramp times I changed) in SDF as attached image shows.
  • 11:16 Observing
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thomas.shaffer@LIGO.ORG - 10:36, Thursday 09 January 2020 (54388)GRD, ISC, OpsInfo
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So it looks like Increase_Flashes has been restoring the TMS TEST bank offsets properly, but ISC_LOCK changes them in ENGAGE_SOFT_LOOPS and MOVE_SPOTS and does not restore the test bank offsets.

Attachment 1 - Showing Incr. Flashes restoring and turning off the TMS offsets in the last lock acquisition.

Attachment 2 - ISC_LOCK moving the TMS and not restoring the offsets.

I'll look next to see why this has changed.

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