aLIGO LHO Logbook

LHO General

thomas.shaffer@LIGO.ORG - posted 08:03, Friday 30 October 2015 (22973)

Ops Owl Shift Summery

Title: 10/30 OWL Shift: 7:00-15:00UTC (00:00-8:00PDT), all times posted in UTC
State of H1: Unlocked since 12:42 UTC (5:42 PST)
Shift Summary: The wind started picking up halfway through my shift, I'm pretty sure a large gust or two took us out of lock. I have been trying different things to get it back up and running with no success. Finished Initial Alignment and leaving it for Nutsinee.
Incoming Operator: Nutsinee
Activity Log:
12:42 Lockloss
13:02 switch blends X and Y dof from the 45mHz to the Quite_90's. I had a handful of locklosses before it would aquire DRMI, but it would aquire ALS nicely. With this and the still high useism, I thought I would give the 90's a try.
13:08 Switch back to 45's. The switch to the 90's immediately looked bad, I couldn't advance to DRMI.
14:00 Loss at SWITCH _TO_QPDS
14:11 Loss at SWITCH _TO_QPDS
14:20 Started Initial Alignment. In the past, if it fails at SWITCH_TO_QPDS repetitively, this could be the sign of bad alignment. Thought it was worth a try.