corey.gray@LIGO.ORG - posted 06:47, Sunday 29 November 2015 - last comment - 08:15, Sunday 29 November 2015(23802)
Update Status
Had a sick OWL shift operator last night. Although Nutsinee offered to accept a call to come in to cover the shift last minute, Mike & I opted to not call someone in at short notice with freezing condition. At the time, H1 was in the middle of a long lock, but unfortunately H1 dropped out of lock before midnight. Patrick fought valiantly and stayed a bit beyond his shift (see his alogs for the play-by-play); I talked with him before going to bed & opted it would be better to get sleep before coming in early.
Walked in at 14:35UTC (6:35am), to H1 trying to lock DRMI, and it did within a few minutes. Right now it is stuck trying to go to REDUCE CARM OFFSET, but there is a Guardian message of: NO IR in arms!!
Was able to get past the "NO IR in ARMS" issue, by taking ISC_LOCK to MANUAL, selecting PREP_TR_CARM, but only made a few steps afteward.
Alignment is looking decent. Made it all the way to RF DARM (no issues with IR for whatever reason), but it dropped attempting DARM WFS.
Went to LOCK PRMI at 15:07, and it successfullly locked within 3min, but it looked good (POP 18 & 90 were both over 150). Now waiting for DRMI.
Current Alignment seems ok since we are making it past DRMI. Since we are dropping out during steps after DRMI, I'm considering continuing an Input Alignment change (investigating now using the IM Recovery procedure). If I need to make a change, I will then need to run another Initial Alignment, and then try locking again.
I'm leaning toward Input Alignment, if I still have trouble after that, I will give Kiwamu a call (already sent him an email giving him a heads up of where I'm at thus far).