TITLE: 09/11 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Oli
SHIFT SUMMARY:
GRB-Short E436769 23:43 UTC Standing Down
https://gracedb.ligo.org/events/E436769/view/
23:59 UTC Dropped out of Observing due to a squeezing issue. Diag Main told me to go look at alog 70050.
After following the instructions there.... see alog
Dropped out of Observing again. 00:31 UTC
Vicki gets on Mattermost, and gives me some guidance. 1:01 UTC
Did it again, This time I just brought the squeeze manager to down and then back up to FDS.
Alog pf this saga:
Changes to the gains were made by Vicki and we got back to observing at 1:48UTC
Well that lasted until 2:24 UTC
Talked with Vicki for a while and allowed her to try a handful of changes after we dropped out of commisioning to see if we could resolve the issue, but at best we could only get the SQZ system to stay locked for an hour at a time at max.
GRB-E436819 4:26 UTC
https://gracedb.ligo.org/events/E436819/view/
The SQZ System has been up and Down all night. It seems as though the SQZ System may need to be turn off for the night.
Vicki gave me the following instructions to get the IFO into Observing with no SQZ.
Overall:
bring SQZ_MANAGER --> DOWN --> NO SQUEEZING
(top of guardian code, Line 36) set SQZ_MANAGER:
nominal = 'NO_SQUEEZING' (instead of 'FREQ_DEP_SQZ')
REVERT following SDF diffs, such that we run with:
(SHG SERVO IN1GAIN = -9
FIBR_SERVO_COMGAIN=15)
5:53 UTC LOCKLOSS
I was in the Process of making the changes and accepting the SDF's diffs to go back to OBSERVING and the IFO Unlocked It's self.
We Got back to NOMINAL_LOW_NOISE @ 06:59 UTC
But couldn't get back to OBSERVE because INIT_ALIGN , ALIGN_IFO and SQZ_MANAGER were "NOT OK". According to the H1:GRD-IFO_SUBNODES_NOT_OK list.
LOCKLOSS 7:15 UTC Lockloss due to button press.
I Tried Reloading INIT_ALIGN to see if it would become "OK", and then I thought, Oh I should just take INIT_ALIGN to DOWN and Back up to IDLE..... WHICH THEN UNLOCKED THE IFO. https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=72797
Edited The Guard IFONodeList to Add SQZ_MANAGER, that is we want to ignore SQZ_MANAGER for the night until someone can coming and make some adjustments.
Passing Oli An Unlocked IFO.
LOG:
Vicki and I were trying to troubleshoot the SQZ system Basically all night.