TITLE: 12/24 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 117Mpc
INCOMING OPERATOR: Jeff
SHIFT SUMMARY:

Today was a light Maintenance Day.  Had lockloss just before noon, but back to NLN in under 3hrs.

SEI_DIFF:  Instead of looking at seismic levels over 0.4um/s, Jenne said to take this node to DOWN if we see glitches on DARM spectrum (generally we get increased glitches due to useism in the 15-30Hz neighborhood.  See Jenne's alogs for specifics.
LOG:

• 15:45-15:58 PEM Injection (Out of Observing)
• 15:58 On Maintenance Day Light, went back to OBSERVING!
• 16:48 Desert Green observed entering via Gate camera.  Driving down X-arm & Y-arm (16:50-17:20).
• 16:51 EQ Alert:  6.0 Argentina w/ it square in the "earthquake" regime for us (R-wave arrival est was 17:31)
  • Surprisingly, ended up not seeing much from this EQ (maybe a small bump on the EQ band).
• 16:52-18:38 Turbo pump measurements at MY & EY (Gerardo, Kyle)
  • 17:07-17:35 MY entry
  • 17:41-18:35 EY entry
• 17:35 SEI_CONF transitioned to WINDY_NO_BRSY  (Ops NOTE:  This did not bump us out of OBSERVING.)
  • Happened to notice more glitches starting around this time on DMT Omega (see attached snapshot); tagging DetChar.
  • 18:38 SEI_CONF transitioned back to WINDY
• 17:40-17:44 OSB Optics Lab work (Travis)
• 17:41 Out of Observing; Observatory Mode:  PREVENTATIVE MAINTENANCE (for EY VEA incursion).  NOTE:  Managed about 102min of OBSERVING this morning up to this point!
• 18:18 SEI_DIFF transitioned to CORNER_DIFF_CPS (Jenne)
  • 18:47 transitioned back to FULL_DIFF_CPS (Jenne)
• 18:22 LN2 Norco truck arrives for CP6 at MX---Correction:  Swore he told me tank #79, but he went to CP2 (#76) at the corner (remained locked as they drove around corner station, but caused a big glitch/drop in BNS range)
• 19:10 EQ Alert:  5.9 Colombia.  It's in "earthquake" regime, so will monitor (R-wave arrival est. is around 19:34)
  • 19:22 Transitioned to EARTHQUAKE (since IMC signals bumped up a little)
• 19:26 Unifirst swipes through gate
• 19:19 Another (!) EQ Alert:  5.7 Colombia. 
• 19:43 VAC checks on the floor in the LVEA (Gerardo, Kyle)
• 19:48(11:48am) LOCKLOSS (after 18.5hrs of lock):  Either caused by VAC LVEA incursion or EQ (but the largest seismic signals had passed several minutes before the lockloss).
• 19:56 LVEA transitioned to HAZARD (Cherl)
• 19:56-22:03 IO Camera adjustment (Cheryl)
• 20:40-21:26 Initial Alignment (Had a look at PRMI, even with CHECK MICH FRINGES check, and PRMI was very misaligned)
  • MICH BRIGHT went to DOWN 6+ times
    • Contacted Jenne for help!
    • Heard mention of changes related to recent INCREASE FLASHES work (and ETM alignment settings)
  • SRC required a few cycles
• 21:14 ISCLOCK reloaded (Cheryl, Rahul)
• 21:27 Relocking Begins Post-Alignment-from-Maintenance
  • 21:42-22:02 Paused at OFFLOAD DRMI for IO Camera adjustment
• 22:03 LVEA Transitioned back to laser SAFE (Cheryl)
• 22:15 In all the hub bub (lockloss at end of Maintenance, locking, alignment, IO camera work & locking again) I forgot to transition SEI_CONF back.
  • SEI_CONF transitioned back to WINDY (this was during the MOVE SPOTS - INCREASE POWER steps of ISC_LOCK).
• 22:28 Back to NLN
• 22:32 Back to OBSERVING!