ryan.crouch@LIGO.ORG - posted 16:32, Thursday 15 October 2026 (92318)
OPS Thursday Day shift summary
TITLE: 10/15 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Commissioning
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY: Commissioners worked on ASC loops and CARM, the IFO can relock up to DRMI pretty quickly with its current alignment.
LOG:
| Start Time | System | Name | Location | Lazer_Haz | Task | Time End |
|---|---|---|---|---|---|---|
| 16:35 | TCS | Camilla, Miriam | LVEA | Y | Move CHETA-Y barrier | 16:48 |
| 17:51 | CAL | Tony, Caroline | PCAL lab | LOCAL | TSK measurement setup | 18:20 |
| 20:21 | Mallika, Alex, Rachel | EndX | N | Walking | 20:44 | |
| 21:03 | TCS | Camilla | CER | Y | Grab headsets | 21:08 |
| 21:22 | TCS | Camilla, Sophie, Miriam | LVEA | Y | CHETA-Y laser measurements | Ongoing |
| 23:02 | CAL | Tony, Fil | EndX | N | Check on PCAL power supply and Chassis | Ongoing |
- We had some trouble in the morning, after the first lockloss DRMI and PRMI both had trouble relocking. Initial Alignment gave us trouble as the IMC couldn't/wouldn't stay locked for INPUT_ALIGN, the FSS kept unlocking. The FSS ended up getting stuck in a loop of 4-3 and then state 2-3, Sheila reverted the alignment to an earlier one with better IR flashes and we skipped input align. PRC went well, MICH_DARK I did by hand, then SR2 was fine but we struggled to lock SRY, adjusting SRM in P helped. Once we got to PRMI the alignment still didn't look great, Elenna adjusted IM4, PR2, BS, and PRM to improve it and then SRM in DRMI as usual.
- All of the CARM_TO_TR locklosses we've had in the past two days (4) appear to be IMC locklosses.
- More ASC loop and CARM measurements at PREP_ASC_FOR_FULL_IFO
- 22:21 UTC An IMC lockloss took us down while commissioners were walking alignments
- Most of locklosses seem to be IMC locklosses this afternoon, from PREP_ASC, and START_TR_CARM
Images attached to this report
