TITLE: 10/30 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 155Mpc
OUTGOING OPERATOR: Austin
CURRENT ENVIRONMENT:
SEI_ENV state: CALM
Wind: 2mph Gusts, 1mph 5min avg
Primary useism: 0.03 μm/s
Secondary useism: 0.47 μm/s
QUICK SUMMARY: IFO been in NLN for 4h40
High Pitched Fire Panel alarm in the CUR was on 15:58 to 15:00:45UTC as the FAC team worked with the fire system. Tagging DetChar
ITMY mode 5 and 8 are not damping so I will try turning gains to zero, plot attached. 73826. Tagging SUS.
ITMY mode 8 was damping with old settings rather than gain = 0 that Ryan had saved in lscparams as VIOLIN_DAMPING was not yet reloaded, will plan to do this when out of observing.
I've put Ryan's new ITMY#8 FM1+FM6+FM10, G=+0.4, settings which is damping it well. I have left ITMY#5 at 0 gain for now.
There is no noticeable change in the data quality at 14:58 (assuming there is a typo in the original log entry). I've attached a spectrogram of the strain data from 14-15UTC. There is non-stationary noise at low frequency throughout the hour and no change is visible at the time of the fire alarm.
I reloaded VIOLIN_DAMPING guardian so it will now keep ITMY#8 gain at 0 to avoid ringing up. Also changed ITMY#5 gain at 0 after talking with Rahul. Tagging SUS.