aLIGO LHO Logbook

H1 General

cheryl.vorvick@LIGO.ORG - posted 08:07, Sunday 23 July 2017 - last comment - 10:56, Sunday 23 July 2017(37711)

Ops Owl Summary:

TITLE: 07/23 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Preventive Maintenance
INCOMING OPERATOR: TJ
SHIFT SUMMARY: started with locked, lost lock, relocked, lost lock due to monster PI modes 27 and 28, relocked,
LOG:

started with locked
lost lock
relocked
lost lock due to monster PI modes 27 and 28
relocked
started glitching, out of Observe for a2l
ODD A2L RESULTS: reduced coherence with YAW, increased coherence with pitch to around 0.9
glitching continued, I adjusted TMSX/Y
running another a2l
watched BS Oplev most of the night, saw one strong glitch in the time series that then dropped the range
second a2l finished, H1 in Observe

Comments related to this report

cheryl.vorvick@LIGO.ORG - 08:12, Sunday 23 July 2017 (37712)

Link

I've tested the addition of +30deg phase on ITMY ROLL and for this lock I saved F6 in SDF, but ran out of time to modify guardian.

cheryl.vorvick@LIGO.ORG - 09:26, Sunday 23 July 2017 (37715)

Link

not sure if this is significant, but I've been noticing peaks in SRCL, and they come and go
they were there in the first lock of my shift, but are not there now, the last lock of my shift
snapshots attached, lock with peaks first, then current lock

Images attached to this comment

thomas.shaffer@LIGO.ORG - 10:56, Sunday 23 July 2017 (37717)

Link

The new filter worked well for me as well. I added it to ISC_LOCK