TITLE: 12/08 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Commissioning
INCOMING OPERATOR: Oli
SHIFT SUMMARY:

16:47UTC Robert went into the CER to turn on an AC and he turned it back on at 17:03UTC and off again at 17:18UTV

I updated ITMY mode8s setting in lscparams after confirming the settings work in a few locks, FM1+FM5+FM10 G= +0.1. ISC_LOCK and VIOLIN_DAMPING. I'm still leaving ITMYs 5/6s gain set to zero as I'm not totally confident in the settings yet, it seems to be damping mode6 but slowly ringing up mode5.

19:08UTC Lockloss

Each of the arms went through increase flashes twice and I had to intervene to find DIFF IR and again during PRMI locking, there were no flashes so I tapped PRM in yaw based on the AS AIR camera. Lockloss at OFFLOAD_DRMI_ASC

I changed the SEI_CONF to microseism before the next lock acquisition attempt

20:03 UTC DIFF IR was not able to lock, complaining of "Bad Xarm alignmen" and I looked at the Xarm error signals and they were indeed quite bad so I took us down to start an IA

20:25 UTC during MICH_BRIGHT there were BS saturations which is unusual and it was not able to make it through the state, it was due to a poor BS alignment. I adjusted the BS in pitch by almost a microradian and the camera looked much better and IA was able to continue

21:26 back to NLN and we started commissioning at 21:30UTC, after relocking DARM was still dominated by the ~508Hz oscillation from ITMY modes5/6 as seen in the LL.

I wasn't really able to damp ITMY mode5/6, all the settings I tried would only damp 1 while ringing up the other, I tried +/- gain with 30 degrees of phase

LOG: