TITLE: 07/24 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 50Mpc
OUTGOING OPERATOR: Travis
CURRENT ENVIRONMENT:
Wind: 20mph Gusts, 17mph 5min avg
Primary useism: 0.08 μm/s
Secondary useism: 0.15 μm/s
QUICK SUMMARY: 3.5 hour lock at 50Mpc. useism is on the rise.
TITLE: 07/24 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 51Mpc
INCOMING OPERATOR: TJ
SHIFT SUMMARY: One lockloss mid-shift. Otherwise, no issues of note that aren't already logged.
LOG: See previous aLogs.
14:33 Bubba to EX to check vaporizer
Confirmed with LLO.
No issues after the one lockloss during relocking noted in my earlier aLog. Accepted SDF diff for LSC-REFL_SERVO_IN1GAIN in screeshot attached.
After the 10:16 UTC lockloss, DIAG_MAIN began reporting that, in addition to the known PCAL Y issues, PCAL X was also off by more than 1%. Trending the RX PD OUTPUT shows that the output changed in a step coincident with the lockloss. I'll not attempt to do anything about this at the moment and let those in the land of the living decide what actions to take.
The Y-end TX PD doesn't show any changes during this time and hence that end would not have been cause of any problem. The X-end changes are small and hence wouldn't have been a cause either. Actually the full rate X-end channel (16 kHz DQ) doesn't show any changes (first plot) and so the changes we see in '*OUTPUT' channel might be some artifact. The small changes we see in Y-end is response to the lock loss. The second zoomed-in plot show that the changes in Y-end happen after the lock loss and only in RX PD. This is indication of test mass moving (oscillating) after the lock loss, due to kick. The PCal could cause lock losses when most of it's power (~100%) changes suddenly or the optical follower servo loop becomes unstable. It wasn't the case here.
DIAG_MAIN was reporting that "ISI HAM6 WD saturation count is greater that 75% of max", so I pressed the "Clear Saturations Only" button from the ISI WD MEDM screen.
No obvious cause.
Lockloss at LOWNOISE_ESD_ETMY while relocking. Had symptoms similar to what Patrick describes in aLog 37710 starting around DC_READOUT.
TITLE: 07/24 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 52Mpc
OUTGOING OPERATOR: Patrick
CURRENT ENVIRONMENT:
Wind: 18mph Gusts, 13mph 5min avg
Primary useism: 0.05 μm/s
Secondary useism: 0.09 μm/s
QUICK SUMMARY: No issues handed off. Lock is 13 hours old.
TITLE: 07/23 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC STATE of H1: Observing at 48Mpc INCOMING OPERATOR: Travis SHIFT SUMMARY: Remained in observing entire shift. Made no changes. Range has been degrading since the beginning of the lock, possibly somewhat correlated with wind. LOG: 00:02 UTC Kyle out of VPW 00:50 UTC GRB alert 00:56 UTC Kyle leaving site
The range has been slowly degrading since the beginning of the lock ~9 hours ago. Have remained in observing.
TITLE: 07/23 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 51Mpc
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
Wind: 18mph Gusts, 15mph 5min avg
Primary useism: 0.05 μm/s
Secondary useism: 0.07 μm/s
QUICK SUMMARY: Kyle is in VPW. No issues to report.
TITLE: 07/23 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 51Mpc
INCOMING OPERATOR: Patrick
SHIFT SUMMARY: One lock loss that I can't explain, but it relocked with little fuss. I had one weird instance around 21:19UTC where the IFO showed signs that it was experiencing an earthquake (~1hz osciallations in control signals and IMC-F_OUT channel, slight motion in OMC Trans camera, DIAG_MAIN even reported a very breif instance of an earthquake from the LSC-CPS_FF channel), but nothing on USGS or the siesmometers. It was very brief, maybe less than a minute.
LOG:
Unknown cause.
Back to Observing. PR3 was off in yaw and violins were all more rung up than usual. There are still a few of the usual culprits that are high, but the rest have damped.
TITLE: 07/23 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 53Mpc
OUTGOING OPERATOR: Cheryl
CURRENT ENVIRONMENT:
Wind: 3mph Gusts, 1mph 5min avg
Primary useism: 0.01 μm/s
Secondary useism: 0.05 μm/s
QUICK SUMMARY: Patrick & Cheryl had some issues with violins and some other mysteries. Environment is calm, runnning at 53Mpc on a glitchy 4 hour lock.
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:
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.
The new filter worked well for me as well. I added it to ISC_LOCK