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Reports until 00:40, Thursday 17 September 2015
H1 General
nutsinee.kijbunchoo@LIGO.ORG - posted 00:40, Thursday 17 September 2015 - last comment - 03:29, Thursday 17 September 2015(21605)
Owl Shift Transition

TITLE: Sep 17 Owl Shift 07:00-15:00UTC (00:00-08:00 PDT), all times posted in UTC

STATE Of H1: Lock Acquisition

OUTGOING OPERATOR: Ed M.

QUICK SUMMARY: Attempting to lock the interferometer. I couldn't get any flashes on POP 18 and 90 while trying to lock PRMI. Since Ed did the initial alignment when the ground motion was still high I think I might try to do the initial alignment again when the ground motion become less active.

Comments related to this report
nutsinee.kijbunchoo@LIGO.ORG - 02:39, Thursday 17 September 2015 (21607)

I finished the initial alignment. After having trouble with INPUT_ALIGN I looked at IM4 and PR2 alignment. IM4 alignment was way off from the last time the ifo was locked. I paused the Guardian and brought IM4 back to where it was. After that it locked in the wrong mode so I adjusted PR2 YAW. I had a little trouble with MICH_DARK_LOCK. BS ISI Watchdog tripped twice. I requested DOWN and waited until the optic settled then tried again. I also had to touch PR3 to maximize COMM beatnote. Everything went well. Now begin lock aquisition. The ground motion has come back to its nominal after series of earthquakes.

nutsinee.kijbunchoo@LIGO.ORG - 03:29, Thursday 17 September 2015 (21608)

Guardian stalled at DC_READOUT_TRANSITION. OMC locked at a wrong mode. Lost lock at DC_READOUT shortly. T2, T3, LF and RT osems had huge number of counts. I called Sheila and she suggested I monitor where the offsets came from. Now relocking.

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