TITLE: 11/04 Eve Shift: 0030-0600 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Aligning
INCOMING OPERATOR: Oli
SHIFT SUMMARY: One lockloss, we are relocking at MAX_POWER.
LOG:
| Start Time | System | Name | Location | Lazer_Haz | Task | Time End |
|---|---|---|---|---|---|---|
| 23:50 | CAL | Tony | PCAL lab | LOCAL | Prep for end station meas tomorrow | 00:35 |
| 00:49 | CAL | Rick | Receiving | N | Pick up PSL parts | 01:25 |
| 00:52 | OPS | Ryan | Optics lab | N | Check on dust monitor | 00:58 |
03:45 UTC Something started to ring up in the DCPDs and the 500Hz line looked large on DARM. None of the vioins were ringing up though, I eventually found that both ETMY and ETMX (mostly ETMX) mode1/6's drive was ringing up and once I turned off the damping the DCPDs came back down and so did the line on DARM. (tagging SUS). I then put the nominal gain back into ETMX mode6 and it started to damp back down.
04:03 UTC We dropped observing, I brought us to Hi gain ASC as a semi large earthquake from Eastern Russia was hitting us (6.0)
04:19 UTC lockloss from the Earthquake
04:55 UTC MC2 M3 tripped as the IMC was trying to relock after a lockloss from FIND_IR, a look at some of the OSEMs
04:56 UTC IA, after INPUT_ALIGN it took the IMC 6 minutes to relock itself
SEI_ENV went to high gain ASC state on its own here for 15 minutes before we lost lock.
