Reports until 01:17, Tuesday 01 August 2017
H1 ISC
cheryl.vorvick@LIGO.ORG - posted 01:17, Tuesday 01 August 2017 - last comment - 07:56, Tuesday 01 August 2017(37925)
with violin mode damping off, modes ringing up in the last 2 hours, OMC DC saturating until I removed some whitening

Attached is a plot of this lock showing violin modes ringing up starting about 2 hours ago (around 6UTC), and OMC DCPD sum also seeing the same thing.

OMC_DCPD was saturating starting at 7:46UTC, and only ended when I'd completed the removal of whitening from the OMC using guardian.

Unsure of what to do now - calling to see what's wanted now:

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Comments related to this report
cheryl.vorvick@LIGO.ORG - 01:19, Tuesday 01 August 2017 (37926)

Here's the violin mode medm: two modes on ETMY are now over 5

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cheryl.vorvick@LIGO.ORG - 02:46, Tuesday 01 August 2017 (37927)

called and talked to Keita - turned violin mode damping on, raised some gains to help damping - attached:

  • violin mode damping medm
  • time series showing effect of turning whitening off
  • 2 striptool snapshots
  • 4 SDF snapshots - I accepted all, some will not match what guardian sets when H1 relocks
Images attached to this comment
cheryl.vorvick@LIGO.ORG - 02:50, Tuesday 01 August 2017 (37928)

snapshot of the range dropping and recovering - note that an EQ arrived just before I took the snapshot, and the range drop is seen on the far right

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cheryl.vorvick@LIGO.ORG - 07:56, Tuesday 01 August 2017 (37930)

violins as of 15:00UTC (before Maintenance)

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