ryan.short@LIGO.ORG - posted 16:48, Tuesday 25 November 2025 (88243)
Ops 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 C
SHIFT SUMMARY: Maintenance day went pretty smoothly and wrapped up mid-morning. After running an alignment, locking went smoothly, but H1 lost lock after 1 minute at low noise. Relocking after that went smoothly also, but took just a bit longer. Since then, PEM measurements have been ongoing and H1 has been locked for just over 2 hours.
- 15:58 - Lockloss from start of maintenance activities
- 19:20 - Starting initial alignment
- 20:48 - NLN
- 20:49 - Lockloss
- 22:29 - NLN
LOG:
| Start Time | System | Name | Location | Lazer_Haz | Task | Time End |
|---|---|---|---|---|---|---|
| 15:56 | FAC | Ken | LVEA | N | Outlet work BSC1/2 | 18:09 |
| 15:56 | FAC | Richard | LVEA | N | Showing Ken the outlet | 16:13 |
| 15:59 | FAC | Eric | MER | N | Replacing heating element | 16:28 |
| 16:14 | FAC | Nellie | EY | N | Technical cleaning | 17:22 |
| 16:16 | CDS | Erik | Remote | N | Rebooting h1susauxe{x,y} | 16:17 |
| 16:20 | VAC | Gerardo | EX | N | Turning on compressor | 18:01 |
| 16:26 | FAC | Kim | EX | N | Technical cleaning | 17:53 |
| 16:28 | FAC | Eric | Site | N | Running fire pumps | 17:07 |
| 16:29 | CDS | Fil | LVEA | N | Pulling JAC cables [HAM1/2 to SAFE] | 18:59 |
| 16:30 | VAC | Jordan | LVEA | N | Measurements near Y-BTM | 16:40 |
| 16:47 | CDS | Marc | LVEA | N | Pulling JAC cables | 18:59 |
| 16:54 | CDS | Daniel | LVEA | N | Pulling JAC cables | 18:59 |
| 16:59 | VAC | Jordan | EX | N | Compressor | 18:01 |
| 17:03 | CDS | Jackie | LVEA | N | Pulling JAC cables | 18:59 |
| 17:34 | FAC | Richard | LVEA | N | Checking on Ken | 17:43 |
| 17:35 | FAC | Nellie | FCES | N | Technical cleaning | 18:31 |
| 18:10 | FAC | Richard | LVEA | N | Taking pictures | 18:22 |
| 18:13 | VAC | Jordan | LVEA | N | Measurements at HAM6 septum | 18:18 |
| 18:20 | FAC | Kim | LVEA | N | Technical cleaning | 19:24 |
| 18:31 | FAC | Nellie | LVEA | N | Technical cleaning | 19:16 |
| 18:46 | PEM | Robert, Rene, Alicia | CER | N | Setting up magnetometers | 19:46 |
| 18:55 | ISC | Keita, Kar Meng | Opt Lab | N | OPO work | 19:35 |
| 19:25 | VAC | Jordan, Gerardo | EX | N | Shutting down compressor | 19:53 |
| 20:57 | ISC | Kar Meng | Opt Lab | Local | OPO work | 00:03 |
| 21:21 | CDS | Jackie | MY | N | Delivering parts | 21:57 |
| 22:41 | ISC | Sheila | Opt Lab | Local | OPO work | 23:08 |
| 00:16 | PEM | Rene, Alicia | CER | N | Setup measurement, huddle test | 00:33 |
| 00:20 | ISC | Kar Meng | Optics lab | LOCAL | OPO work | Ongoing |
| 00:21 | ISC | Marc | Optics lab | LOCAL | Help with osciliscope issue | Ongoing |