Reports until 08:14, Sunday 23 February 2020
H1 General
cheryl.vorvick@LIGO.ORG - posted 08:14, Sunday 23 February 2020 - last comment - 09:23, Sunday 23 February 2020(55240)
OPS Owl Summary

TITLE: 02/23 Owl Shift: 08:00-16:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 105Mpc
INCOMING OPERATOR: Patrick
SHIFT SUMMARY: H1 locked in Observe all shift
LOG:

Comments related to this report
cheryl.vorvick@LIGO.ORG - 09:23, Sunday 23 February 2020 (55243)
Link

Violin Damping - damped ETMY mode 12 and then mode 20 - setup for this was:

  • damping mode 12:
    • gains set to zero on ETMY modes 11
    • -60deg phase engaged on mode 12
    • gain on mode 12 started at 1, then increased as the mode damped, gain = 1, then 2, then 6, then 10
  • damping mode 20:
    • gains set to zero on ETMY modes 11, 12, and 18
      • Modes 11 and 12 have broad damping filters that overlap with mode 20, preventing the damping of mode 20 (modes 11 and 12 need updated damping filters)
      • gain on mode 18 set to zero since this peak was damped, and it's damping filter also interacts with mode 20's damping filter
  • durnind damping of mode 12 and 20, gains set to lower values on ETMY modes 13, 14, and 15
    • the lower gains were in use most of my shift, through multiple glitches, and the mode's RMS have remained low
      • modes 13 and 14: each damped with a gain of 20
      • mode 15 damped with a gain of 5
  • all gains and the -60deg phase filter on mode 12 are reverted