thomas.shaffer@LIGO.ORG - posted 16:11, Wednesday 27 March 2024 (76745)
Ops Day Shift End
TITLE: 03/27 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing
INCOMING OPERATOR: Oli
SHIFT SUMMARY: We've been locked for over 4.5 hours and have just transitioned back to Observing for the rest of the evening. The one lock loss we had was possibly cuased by work on the floor. Relocking was straight forward, I ended up moving PRM to lock PRMI in an attempt to avoid an initial alignment. It took 57 min to relock.
- 1726 Lock loss. HAM1 HEPI tripped
- 1821Back to low noise
- DRMI/PRMI looked awful when it first arrived. In an attempt to avoid an initial alignment, I let it run a Mich bright, then I moved PRM a fair amount in pitch and yaw to get PRMI to lock. DRMI locked up without issue after this. No other intervention was needed.
- 57min from lock loss to NLN
- 2308 Observing
LOG:
| Start Time | System | Name | Location | Lazer_Haz | Task | Time End |
|---|---|---|---|---|---|---|
| 16:09 | VAC | Gerardo | site | n | Forklifting septum from woodshop to LSB receiving | 16:39 |
| 16:09 | ISC | Sheila, Artem | CR | n | ESD bias change | 18:09 |
| 16:26 | ISC | Daniel | LVEA | n | Look at PSL racks | 16:45 |
| 16:46 | FAC | Kim | H2 | n | Tech clean | 18:46 |
| 17:11 | SQZ | Julian | OptLab | yes | SHG work | 19:32 |
| 20:09 | ISC | Sheila | LVEA | n | Checking on PSL racks | 20:29 |
| 22:12 | PEM | Robert | LVEA | n | Turn off amps, clean up | 22:17 |
| 22:19 | PEM | Robert | EX | n | Shaker meas | 23:14 |