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:
Start Time |
System |
Name |
Location |
Lazer_Haz |
Task |
Time End |
18:30 |
ASC |
Keita |
HAM6 |
N |
Install ADC ASC component |
18:36 |