TITLE: 03/12 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 66Mpc
INCOMING OPERATOR: Jeff
SHIFT SUMMARY: Quiet shift. Not much going on. LLO is down.
Still Observing. LLO is also up.
TITLE: 03/12 Owl Shift: 08:00-16:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Recent lockloss.
OUTGOING OPERATOR: Travis
CURRENT ENVIRONMENT: Wind: 15mph Gusts, 9mph 5min avg Primary useism: 0.02 μm/s Secondary useism: 0.72 μm/s
QUICK SUMMARY: Looks like wind and useism is low enough for me to lock the IFO. Accepted SDF differences (see attachment) and back to Observe.
Okay just before I was about to post this alog PI mode rung up so fast I couldn't damp it in time. Lost lock because of that.
Back to Observe. I hope it stays this way this time.
TITLE: 03/12 Eve Shift: 00:00-08:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Nutsinee
SHIFT SUMMARY: Pretty rough shift with high wind and extremely high microseism for the duration. PSL tripped and was reset at the beginning of the shift. Since then, almost every known problem has occurred (many not logged since they are 'common' problems and I was more concerned with fixing the issues than recording their times). The most frequent issue seems to be the PSL FSS PZT oscillating, which I had to deal with ~20 times during the shift. We made it as far as COIL_DRIVERS once, so I'm pretty confident that the main issues are with the environment and not the IFO. If it makes anyone feel better, LLO has been down for the entire shift as well.
LOG: See previous aLogs.
Struggling to get back to locking. Lots of FSS PZT oscillations since the PSL was brought back up. ETMX RMS watchdog has tripped several times. Got a few "Tidal X/Y error" messages, but not for an hour or so. We have made it as far as INCREASE_POWER a couple of times, but during the power up steps, got "OMC DCPD Saturation" notifications and lock was lost. Microseism is still very high and wind is picking back up. Looks like it will be a rough night.
The tidal alarms have been continuing so I called Keita. We looked at the tidal arm servos which seemed to be railing at their limits causing the alarm. I kept an eye on them and X arm had another alarm when it reached its limit of 10. At Keita's suggestion, I increased the limit to 12 and the signal ramped to -11.145 and stopped, so it appears it just needed a bit more range. I'll leave it at this value for tonight since we seem to be struggling with microseism which is still hovering around 1 um/s.
Another X arm tidal alarm. This time I increased the limit to 15 and the signal ramped to -13.679. I also now have a DIAG_MAIN message of 'TIDAL_LIMITS:X_COMM_CTRL output within 10 percent of limi'.
Reset the laser without any problems. I also reset the injection locking counter which was 19. By the time all the
other servos had re-acquired, the injection locking counter had reached 3. Had to enter the LVEA to reset the noise
eater.
The trip was caused by the drop in flow rate in head 3. Note that the flow rate in head 3 dropped close to the
trip limit and appeared to recover before really crashing approximately 10 minutes (~594 s) later.
Shift Summary: Ran A2L script – Pitch is at or below the reference; Yaw is over 0.7. Will run the A2L script if the opportunity presents.
Wind and seismic activity has been rising since mid-shift. Several gusts near 40 (at least one over). Primary microseism in X & Y is around 0.09um/s and secondary microseism in Z is up to 2.0um/s. Lost lock just after big wind gust (over 40), PI-Modes 23 & 27 ringing up, and microseism high. Shortly after the lock loss, the PSL went down with a Flow1 error. Peter is coming in to reset the PSL.
TITLE: 03/12 Eve Shift: 00:00-08:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Other
OUTGOING OPERATOR: Jeff
CURRENT ENVIRONMENT:
Wind: 32mph Gusts, 27mph 5min avg
Primary useism: 0.07 μm/s
Secondary useism: 1.32 μm/s
QUICK SUMMARY: PSL is currently down. PeterK is on site attempting a reset. Wind and microseism are still very high.
Good observing shift so far. Range stands at 65.6 Mpc.
One Mag 5.5 EQ that did not cause any difficulties. The wind and secondary microseism have kicked up a bit. The A2L script needs to be run at the next opportunity.
- Lots of good observing time, duty cycle 71.5% (including maintenance), range stable at around 65 Mpc
- 1 instance of low frequency noise (10-30Hz) solved by running a2l; no significant impact on range
- issue with DMT machine after maintenance caused "observing" bit to not be set, h(t) unaffected
Mag 5.5 Earthquake near L'Esperance Rock, New Zealand
Seen on USGS, Seismon, and Terramon
USGS - Mag 5.5 EQ at 17:10 UTC
Terramon - Mag 5.5 EQ at 17:10 UTC, Predicted R-Wave of 1.58um/s arrival 17:59
Rise in the BLRMS around 17:25 UTC; Primary microseism peak of 0.1um/s
No apparent effect on H1
TITLE: 03/11 Owl Shift: 08:00-16:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 64Mpc
INCOMING OPERATOR: Jeff
SHIFT SUMMARY: Locked for almost 14 hours and counting. Nothing exciting happened. Hanford patrol came but only went to LSB last night.
Been observing for ~10.5 hours now. Quiet night.
TITLE: 03/11 Eve Shift: 00:00-08:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 63Mpc
INCOMING OPERATOR: Nutsinee
SHIFT SUMMARY: One lockloss early in the shift. Relocked with no issues and have been in Observing for ~6 hours.
LOG:
7:41 Cleared H1IOPASC0 timing error.
No issues relocking. I reloaded ISC_LOCK Guardian at Sheila's request, and she updated the ETMX_L2_OLDAMP_P_GAIN and accepted the SDF diff.
Cause unknown.