(Pretend this was posted by TJ)
TITLE: 10/29 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 150Mpc
INCOMING OPERATOR: Oli
SHIFT SUMMARY: Two relocks, both lock losses caused by earthquakes. Both relocked needed an initial alignment and needed the high gain ASC to avoid the 1 Hz ringup. While locked recently, EY violin mode1/6 started to slowly ring up. I tried many settings and the best I found was Mode 1 +60 -0.2 gain, but I wouldn't say it worked, just made it not grow as fast. While we were looking at this ETMX mode 6 also started to grow. When Oli tried to damp it we noticed large changes in the DCPD window traces on the FOM. See attached. The line at 500Hz in DARM also went down by about an order of magnitude, all almost instantly. The violin mode monitors didn't show a change though. No clue what happened but the violins aren't terrible.
We've been observing for 4 hours.
LOG:
1558 Observing
1722 Lock loss
1940 Observing
| Start Time | System | Name | Location | Lazer_Haz | Task | Time End |
|---|---|---|---|---|---|---|
| 14:44 | FAC | Kim | Opt lab | n | Tech clean | 15:36 |
| 15:20 | FAC | Randy | Xarm | n | BTE sealing between MX and EX | 22:03 |
| 17:42 | SPI | Corey, Betsy, Ryan S | Opt Lab | n | Optics cleaning (Betsy out 1905) | 19:38 |
| 19:17 | IO | Rahul | Opt Lab | LOCAL | JM optic measurements | 20:02 |
| 19:59 | IO | Keita | Opt Lab | n | Cleanup of ISS Array | 21:55 |
| 21:29 | SPI | Corey, Ryan | Opt lab | n | First contacting optics | ongoing |
| 21:47 | PCAL | Tony | PCAL Lab | LOCAL | Swapping spheres | 22:12 |
