nutsinee.kijbunchoo@LIGO.ORG - posted 09:32, Thursday 29 October 2015 - last comment - 11:49, Thursday 29 October 2015(22948)
Ops Day Shift Transition
TITLE: "10/29 [DAY Shift]: 15:00-23:00UTC (08:00-16:00 PDT), all times posted in UTC"
STATE Of H1: Observing at ~ 80Mpc
OUTGOING OPERATOR: Ed
QUICK SUMMARY: Back to Observing at 16:12:48 UTC.
Had a bit of a trouble with PRMI. I trended some of the optics witness and oplev channels and BS remained relatively unchanged after the lockloss but PRM was kicked. So I touched only PRM pitch and yaw to get PRMI to lock while watching POP90 and POP18. I accepted SDF changes for the second harmonics ETMY violin mode damping gain and the new ASC DHARD gains that were introduced to fix the loop instability. I was out of Observing shortly to fix the mistake I made with the SDF (confusion between revert and accept).
Some DRMI and PRMI info for Sheila:
I requested at 15:11:07 UTC. After waiting at least 10 minutes I adjusted PRM to maximize POP90 and 18. Once POP90 flashed close to 40 counts I let Guardian took over. And after waiting another 5 minutes PRMI locked successfully. After I maximize POP90 and 18 during the PRMI locked I re-requested LOCK_DRMI_1F and it locked almost imediately.