thomas.shaffer@LIGO.ORG - posted 04:48, Friday 05 April 2024 - last comment - 08:14, Friday 05 April 2024(76975)
Ops Owl Report
The IFO lost lock at around 1015UTC, then while running an alignment, a 6.8M earthquake from the pacific rolled through, tripping ST1&2 ITMY ISI. This also put SEI_ENV into error for requesting the EARTHQUAKE state from SEI_CONF, which for reasons is actually EARTH_QUAKE. I'm waiting for the ground motion to come down a bit before finishing the alignment and starting to relock.
After waiting a bit for the earth to calm down, I tried finishing up the alingment, which was a non-issue. When I tried locking, I was able to lock PRMI but not DRMI. The AS air camera spot looked off, but no matter how much I adjusted SRM, I couldn't get it to lock or get the spot to look much better, I ran another alignment, but skipped green and input align. At this point another earthquake rolled through and made SRC a bit tricky, but it eventually locked. Second time around and I was back in the same spot. PRMI would lock, though it perhaps looked shaky, but I couldn't get DRMI to lock. It would have many "baby" locks, but I couldn't seem to increase the POP flashes. I tried changing the trigger thresholds for SRCL and MICH, but this didn't seem to help either.
I ended up giving up and running a full alignment. It's currently finishing up SRC and I'm handing this off to Ryan.