Displaying report 1-1 of 1.
Reports until 00:01, Tuesday 25 April 2023
H1 General
austin.jennings@LIGO.ORG - posted 00:01, Tuesday 25 April 2023 - last comment - 12:37, Tuesday 25 April 2023(68968)
Monday Eve Shift Summary

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
Comments related to this report
camilla.compton@LIGO.ORG - 12:37, Tuesday 25 April 2023 (68988)

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.

Images attached to this comment
Displaying report 1-1 of 1.