ryan.crouch@LIGO.ORG - posted 12:32, Wednesday 26 November 2025 (88249)
OPS Wednesday DAY shift summary
TITLE: 11/26 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY: We've had two locklosses today, both while people where out on the floor. Relocking has been fairly automated, we had a TCS CO2Y laser issue that we resolved. We are relocking at MOVE_SPOTS as of 20:30 UTC. LVEA zone4G got a bit warm but its leveled out.
LOG:
| Start Time | System | Name | Location | Lazer_Haz | Task | Time End |
|---|---|---|---|---|---|---|
| 16:47 | PEM | Robert | LVEA | N | Set up measurements, check on zone4 | 17:05 |
| 17:31 | PEM | Robert | LVEA | N | Setup shaker in *danger zone*, in and out | 20:18 |
| 17:34 | ISC | Kar Meng | Optics lab | LOCAL | OPO work | 19:27 |
| 18:56 | TCS | Sheila | LVEA | N | Reset CO2Y | 19:11 |
| 19:38 | FAC | Tyler | Mids | N | Find boom lift and inflate the tires | 20:06 |
| 19:54 | TCS | Daniel, Sheila | LVEA | N | Wiggle TCS CO2Y cable | 20:03 |
- 15:57 UTC GRB-Short E620044
- 17:50 UTC lockloss
- 18:48 UTC TCS CO2Y tripped off, IR error. Sheila went to the LVEA to reset the controller which cleared the IR alarm but it was still reporting no power and a low current, She then went and reset the power supply in the Mezzenine this didn't solve the issues either. After Daniel tried toggling the laser off and on we saw the IR light start to flash on and off which from TJ is a sign that the cable might be loose. Sheila and Daniel went out and checked out the cable and reset the controller again which brought it back!
- 19:10 UTC GRB-Short E620052
- 19:18 UTC NLN
- 19:58 UTC lockloss
- IMC took 7 minutes to lock