TITLE: 12/12 Eve Shift: 00:00-08:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 110Mpc
INCOMING OPERATOR: Corey
SHIFT SUMMARY: locked in Observe most of the shift
LOG:

• 00:18:22 - H1 in Observe
• 00:35:00 - LVEA lights were turned off
  • at 00:35:00, Gerardo opened the High Bay door the the LVEA, and turned off the LVEA lights
  • the lights in the Clean Area and CER were also turned off (before the LVEA lights)
  • Gerardo did not enter the LVEA, so did not walk on the Technical Slab
• 00:18-00:35 Observe mode was non-standard, due to lights and access to the above areas
  • above info also in my alog 53849
• 01:14 - Kyle to MY
• 01:31 - Kyle back from MY
• nuc25 had to be restarted
• ITMX violin mode damping has non-standard gains
  • IH1:SUS-ITMX_L2_DAMP_MODE17_GAIN, 1003.12Hz, nominal = 20, gain = 120, higher gain needed to damp the peak
  • H1:SUS-ITMX_L2_DAMP_MODE19_GAIN, 998.018Hz, nominal = 0, gain = 60, usually I use gain of 20, higher gain needed to damp the peak
• ETMY violin mode damping has non-standard gains
  • H1:SUS-ETMY_L2_DAMP_MODE11_GAIN, 1000.061Hz, nominal = 150,  gain = 0, peak was damped, no longer visible in spectra
  • H1:SUS-ETMY_L2_DAMP_MODE12_GAIN, 1000.423Hz, nominal = 2,    gain = 0, peak is visible, but small, and damping interfeared with modes 18 and 20
  • H1:SUS-ETMY_L2_DAMP_MODE13_GAIN, 1009.932Hz, nominal = 130,  gain = 60, peak was no longer visible in spectra, then it was again
    • used a reduced gain to avoid interfering with modes 18 and 20
  • H1:SUS-ETMY_L2_DAMP_MODE14_GAIN, 1017.985Hz, nominal = 100,  gain = 50, peak was no longer visible in spectra, then it was again
    • used a reduced gain to avoid interfering with modes 18 and 20
  • H1:SUS-ETMY_L2_DAMP_MODE15_GAIN, 1018.238Hz, nominal = 1500, gain = 0, peak was damped, no longer visible in spectra
  • H1:SUS-ETMY_L2_DAMP_MODE18_GAIN, 1000.296Hz, nominal = 0,    gain = -8,
    • with modes 12 and 20 no longer visible in spectra, and damping turned off, allowed me to increase mode 18 gain to -8
  • H1:SUS-ETMY_L2_DAMP_MODE20_GAIN, 1000.307Hz, nominal = 1,    gain = 0, peak was damped, no longer visible in spectra
• I've asked Corey to watch ITMX and ETMY violins, since these damping gains are set up to damp ETMY mode 18, and not standard config.