TITLE: 12/01 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 114Mpc
INCOMING OPERATOR: Patrick
SHIFT SUMMARY: H1 locked in Observe all shift
LOG:

• 21:21:54 UTC - airplane heard in the CR
• 21:50:55 UTC - airplane heard in the CR
• violin mode damping
  • ITMX: ndscope plots attached as one image
    • mode13 - gain set to 20 @ 16:31:00UTC
    • mode17 - gain increased from 20 to 30 @ 17:04:20 UTC
    • when damping these, monitoring mode20
  • ETMY: ndscope plot attached
    • mode 12:
      • gain set to 0.1 @ 19:53:56 UTC
      • gain increased to 0.5 @ 20:03:30 UTC
      • gain increased to 1.0 @ 20:09:43 UTC
      • gain increased to 4.0 @ 20:17:40 UTC
      • gain increased to 10.0 @ 20:23:16 UTC
      • gain increased to 15.0 @ 20:32:38 UTC
      • gain increased to 20.0 @ 20:43:08 UTC, the drive did not increase, indicating saturation, so I went back to a gain of 15
      • gain increased to 15.0 @ 20:44:18 UTC
      • since ETMY mode 12 has had reports of being difficult to damp, I ramed up the gain very slowly
      • it's possible that the saturation with gain = 20 caused some additional noise in DARM
• final attachment shows the decrease in RMS from tonight's violin mode damping