Reports until 00:00, Tuesday 16 April 2019
LHO General
patrick.thomas@LIGO.ORG - posted 00:00, Tuesday 16 April 2019 (48522)
Ops Eve Shift Summary
TITLE: 04/15 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 107Mpc
INCOMING OPERATOR: Niko
SHIFT SUMMARY: Rough night for locking. See log.
LOG:

23:36 UTC Lock loss
00:06 UTC Stopped at PREP_DC_READOUT_TRANSITION. Commissioning resuming.
02:01 - 2:05 UTC Sheila to LVEA, setting DC PD transimpedance back to normal
02:07 UTC Lock loss
02:41 UTC Lock loss from ENGAGE_ASC_FOR_FULL_IFO
02:42 UTC Initial alignment
03:54 UTC Initial alignment done
04:16 UTC Lock loss from DARM_TO_DC_READOUT
05:11 UTC Broke lock reverting SDF differences at NLN (alog 48518)
X arm green transmission keeps falling off
Going to try an initial alignment of just green arms
05:28 UTC Finished alignment and offloading of green arms. Relocking.
Initial alignment of green arms seems to have helped. Able to move past ALS without X arm transmission falling off.
Stopped at PRMI and aligned BS and PRM, but lost lock after a poor acquisition of DRMI
Another poor acquisition of DRMI but was able to adjust SRM in time to fix it before it broke lock
06:07 UTC NLN. No SDF differences.
06:08 UTC Observing
06:10 UTC Dropped out of observing by squeezer. CLF unlocked.
Fixed by hitting init, down, etc on various squeezer guardians and then 'caput H1:SYS-MOTION_C_BDIV_C_OPEN 1' when it was trying to lock OMC
06:19 UTC Observing