Reports until 20:39, Friday 12 July 2024
H1 General
ryan.short@LIGO.ORG - posted 20:39, Friday 12 July 2024 (79086)
Ops Eve Mid Shift Report

H1 has been unable to relock so far this shift. After running an initial alignment at the start of the evening, we were able to reach MAX_POWER fairly consistently before a 0.5Hz oscillation started in ASC MICH_P and also smaller in DHARD_P and some SRC_P which would cause a lockloss. After one of these locklosses, when relocking DRMI, there would be many SRM and SR2 saturation callouts after DRMI ASC turned on and DRMI would lose lock. I dropped back down to run another initial alignment, paying closer attention this time, and everything went smoothly aside from SRC alignment, where no matter what SRM and SR2 moves I made, we could not acquire SRY. Trending OSEMs, optics in the SRC are in generally the same place as they are when locking normally, so I'm unsure at this point where the misalignment is (and I'm hesitant to move SR3 at this stage). The AS AIR camera has looked quite bad the whole time as well.

Starting the locking sequence to see what things look like now.