Ops Shift Log: 12/05/2019, Owl Shift 08:00 – 16:00 (00:00 - 08:00) Time - UTC (PT)
State of H1: Locked at NLN
Intent Bit: Observing
Support: N/A
Incoming Operator: Niko
Shift Summary: After resetting the HAM6 HV Interlock, relocked the IFO with very little difficulty. No problems to report at this time
Activity Log: Time - UTC (PT)
08:00 (00:00) Take over from Patrick
11:37 (03:37) Lock loss – HAM6 HV Interlock trip
14:09 (06:09) Start relocking after Richard reset HAM6 HV Interlock
14:52 (06:52) Accepted two ETMX SDF differences and went into Observing
16:00 (08:00) Turn over to Niko
DetChar:
I noticed that the Squeezer fibre rejection had been creeping up for some hours before this lockloss.
Given that the Squeezer is in HAM6, could this be related, or a symptom of some issue in the tank?
Edit, Having looked at data using ndscope more closely with Jenne:
It seems there is something wonky happening to the fibre reflection power monitor, but it happens a little bit after a lockloss.
Looking backs some months, it seems that what I was looking at was a coincidence on a couple of occasions, and doesn't have any longer term consistency.