TITLE: 07/12 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY: Currently finishing up with a IA to align SRM.

Lock1:

• 15:32 to 16:01 UTC dropped Observing to do some range checks alog79069
• 16:44 UTC lockloss alog79073

Lock2:

• 18:07 UTC lost it at INJECT_SQUEEZING, we were getting shaken by an earthquake at the time, it looks like MICH rang up?
• We kept losing it at PREP_DC_READOUT, while the OMC was trying to lock, at different points of the OMC locking sequence. The ASC signals go crazy, maybe the SRM alignment isn't good enough?
  • Tried turning off the DARM offset once we got to PREP_DC
  • Sitting in SOFT_LOOPS we turned off ASC and adjusted SRM, lowered the DARM OFFSET, then thesholds were lowered like OMC-DCPD_SUM_OUTPUT from 10 to 7 which got it to lock alog79082
  • 22:49 UTC lockloss at TRANSITION_FROM_ETMX
  • AS AIR looked much worse now, after losing it at DRMI we dropped to start an initial alignment at 23:12 UTC, skipping green arms
  • We had to align SRM by hand as it was too badly misaligned for the GRD
• 20:15 UTC erroneous signal from the HWUT seismometer on picket-fence

LOG: