TITLE: 04/25 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Commissioning
SHIFT SUMMARY:
- Beginning of shift was mostly waiting for ringdown from the huge EQ from earlier in the day and getting the IMC to lock after a power supply swap, log here
LOCK #1:
- Had to intervene with locking ALS and DRMI (through ACQUIRE_PRMI), but not by much
- Acquired NLN @ 00:35 UTC, where multiple measurements were done
- LOCKLOSS @ 4:38 UTC due to CARM sensor switching from B to A
LOCK #2:
- Again, had to intervene with locking ALS, though I probably should have given GRD more time to see if it could do it on its own
- Had issues with DRMI again, gave GRD ~5 minutes before intervening, I moved PRM ~35 microradians in Y and ~6 microradians in P to be able to catch PRMI
- Acquired NLN @ 5:50 UTC
- Leaving the IFO locked at NLN, Dan is currently running AWG lines and CO2 stepping from 2.2 W to 4 W
LOG:
| Start Time | System | Name | Location | Lazer_Haz | Task | Time End |
|---|---|---|---|---|---|---|
| 00:05 | ISC | Adrian | CER | N | Quick checks | 00:07 |
| 00:37 | ISC | Jeff | CR | N | Turning on PCAL/DARM lines | 03:27 |
| 01:40 | ISC | Elenna | CR | N | AWG line injections/ADS lines/DARM OLG | 05:44 |
| 06:52 | ISC | Dan | Remote | N | CO2 stepping/AWG lines | ONGOING |
Next three locklosses:
2023-04-25 08:28:29 UTC 2h30 at NLN. CO2X was increased from 2.2W to 4.0W 1h30 before lockloss. Unsure of cause. Not PI. Not Violins. Buildups attached.
2023-04-25 11:01:27 UTC 1h30 at NLN. CO2X at 4W throughout lock. 10.4kHz PI. See attached. SUS_PI guardian was in state PI_DAMPING but didn't work well enough, maybe the mode rang up to quickly. We can make guardian smarter if these locklosses continue as it currently changes phase if the RMSMON is above a certain value rather than checking if RMSMON is decreasing. See attached.
2023-04-25 15:00:29 UTC 3h into NLN. CO2X at 4W throughout lock. Lockloss from Tuesday Maintenance start.
All locks: CO2Y at 1.7W, Ring Heaters: IX 0.4W, EX: 1.3W, IY 0W, EY 1.2W.