Reports until 20:05, Tuesday 25 July 2023
LHO General
ibrahim.abouelfettouh@LIGO.ORG - posted 20:05, Tuesday 25 July 2023 - last comment - 09:16, Wednesday 26 July 2023(71717)
OPS Eve Midshift Update

IFO is in OBSERVING as of 01:14 UTC

We lost lock at 23:54 UTC (alog) with no apparent cause

Lock Acquisition:

1. IR was not found on ALS_DIFF and so I moved the Diff Offset slider from 397 to 417 and IR caught immediately thereafter. No further touching was needed all the way to NLN. There was no wait between OMC_Whitening and NLN.

2. There were ASC SDF diffs (screenshot below), but they showed a difference of 0 (though were initially showing up as red). Hitting the "observe" intention too early on my part I think stopped guardian from clearing these because as soon as I toggled it back, all guardian nodes were ready for observing.

Images attached to this report
Comments related to this report
camilla.compton@LIGO.ORG - 09:16, Wednesday 26 July 2023 (71727)

The sdf diff screen in the screenshot isn't the real diffs. This is showing "FULL TABLE" and "SORT ON SUBSTRING: DHARD_Y". How I left it yesterday.  To see the actual diffs, you should change the dropdown boxes to "SETTING DIFFS" and "SHOW ALL". I expect the diffs were from waiting for the ADS camera's to converge.