TITLE: 08/30 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 149Mpc
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY:
Lock#1:
Lockloss at 16:18UTC
The squeezer kept losing lock all morning, and the ISS saturated.
Lock#2:
After some investigation while we were relocking it was found that FC1 was having troubles, Fil power cycled the chassis and then swapped the coil driver and satellite box for a spare. But none of these actions were successful to fix the issue.
We required NLN at 17:52, but we stayed out of Observing while the FC1 investigation/work was ongoing. It was narrowed down to an issue with the T3 BOSEM on FC1. An old (2011) ADC card ended up being swapped for a new one (2021) which was the root of issue! Fil swapped back the original coil drivers and satellite box. Alog72558 documenting the process
I took a broadband and simulines calibration measurement during the investigation time, then a second one later on in the afternoon.
Back into Observing at 22:46UTC after squeezer commissioning and MICHFF testing.
LOG:
| Start Time | System | Name | Location | Lazer_Haz | Task | Time End |
|---|---|---|---|---|---|---|
| 15:25 | FAC | Cindy | MidX | N | Tech clean | 16:53 |
| 17:39 | EE | Fil | CER | N | Investigate FC1 | 17:51 |
| 17:59 | EE | Fil | MidY | N | Get a spare satellite box | 18:22 |
| 18:22 | EE | Fil | CER | N | Coil driver, Satellite box swap FC1 | 18:50 |
| 18:50 | FAC | Cindy | Mech room | N | Tech clean | 19:37 |
| 19:40 | SUS | Fil, Rahul | CER | N | Investigate whether to replace AA chassis | 20:07 |
| 19:41 | FAC | Cindy | H2 | N | Tech clean | 19:58 |
| 19:50 | LSC | Elenna | Remote | N | Test new MICHFF, OMC injection | 20:19 |
| 20:15 | EE | Fil, Dave | MSR, CER | N | HAM7 FC1 AA chassis swap, restore swapped parts (Coil drivers, satellite box) | 20:40 |
| 20:42 | ASC | Elenna | Remote | N | Measurments, 8Hz line | 21:20 |
| 20:45 | SQZ | Vicky, Sheila, Naoki | CR | N | SQZ commissioning | 22:28 |
| 21:16 | FAC | Randy | LVEA, west bay | N | Grab parts | 21:21 |
| 22:19 | FAC | Tyler | EndY chiller yard | N | Check on chiller | 22:33 |
| 22:37 | LSC | Elenna, Camilla | Remote | N | Test new filter | 22:45 |