ryan.crouch@LIGO.ORG - posted 16:30, Thursday 16 October 2025 (87506)
OPS Thursday day shift summary
TITLE: 10/16 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 151Mpc
INCOMING OPERATOR: Oli
SHIFT SUMMARY: The DARM fom struggled this morning as it wasn't getting data from GDS and sometimes nds2, ETMY beam spot adjustment alog87508, and we had to swap the ITMY L2 sat amp box alog87515. A PRM filter was also turned off alog87523, and I accepted some CDS calibration report related SDFs. After we relocked post sat amp swap there was a 1Hz ringup seen in ASC, but it calmed down.
LOG:
| Start Time | System | Name | Location | Lazer_Haz | Task | Time End |
|---|---|---|---|---|---|---|
| 15:01 | FAC | Randy | Yarm beam tube | N | Beam tube inspection, mid to corner | 17:56 |
| 15:04 | FAC | Kim , Nellie | VAC prep lab | N | Tech clean | 15:31 |
| 18:19 | ISC | Jennie | Vac Prep lab | N | Looks for parts | 19:30 |
| 18:23 | FAC | Kim, Nellie | Receiving, then Mids | N | Tech clean and look for stuff | 18:49 |
| 18:25 | PSL | Keita | Optics lab | N | ISS array, Laser Safe | 19:43 |
| 18:32 | PSL | Rahul | Optics lab | N | Join Keita | 19:43 |
| 19:04 | FAC | Eric | Staging | N | Move boom lift to LeXi | 19:29 |
| 20:06 | EE | Fil | LVEA | N | ITMY L2 sat amp swap | 20:16 |
| 20:39 | FAC | Randy | Xarm | N | Beamtube calking | 22:10 |
| 21:06 | PSL | Jennie | Optics lab, Vac prep | N | Check for parts/tools/cleanliness, Laser Safe | 22:00 |
| 21:34 | SUS | Rahul | LVEA, near PSL | N | Grab parts | 21:47 |
| 21:45 | PSL | Keita | Optics lab | N | ISS array work | 23:09 |
- 15:00 UTC GRB-Short E610703
- 15:10 - 15:30 UTC Observing after relocking at 15:07 UTC
- 18:00 - 18:32 UTC Calibration measurement
- 18:45 While Jim was running an ISI HAM5 measurement SUS IY started to report OSEMs in fault and was flashing the red "Rocker Death Switch" on L2, possible Sat Amp issue
- 19:31 UTC Observing
- 19:54 UTC Dropped Observing to turn L2 feedback back on, half hoping it would break the lock
- 20:03 UTC We broke the lock to swap the Sat Amp box, Jeff flipped the polarity of IN2 on the IMC common mode board as we do before Tuesday maintenance
- 20:05 UTC SEI to maintenance for Fil to go into the biergarten
- 20:16 UTC recovered SEI/SUS and back to locking
- 20:44 UTC IA
- The alignment still wasn't great, we couldn't get DRMI and it took 12 minutes to get PRMI with me helping PRM and the BS. I had to move SRM in pitch a decent amount considering that we just finished an IA
- 22:28 UTC Observing
Images attached to this report
