Shifter: Adrian Helmling-Cornell

ahelmlin@uoregon.edu

Highlights from my DQ shift this past week:

• Observing for 81.0% of the week
• Observing just under 120 Mpc every day
  • Range was really stationary most days
• Two glitchy periods on Monday that didn't match up with the usual seismic suspects
• 90 Hz noise, noted last week, was present on Monday
  • Bruco results inconclusive
• Squeezer/FSS stability problems caused more downtime
• EX PEM chassis channel showing up in HVeto
• Large earthquake Sunday causes brief range drop, lots of glitches, but stayed in observing

For the full report see: https://wiki.ligo.org/DetChar/DataQuality/DQShiftLHO20200203