Attached are this week's charge measurements - as usal, they are plotted on the long trend of many months worth of data. Trends look as expected - very slow trend away from zero - no major surprises.
- Duty Cycle 83.9% (that includes downtime for Tuesday maintenance)
- Range at 75-80Mpc
- only 1 lock loss (aside from maintenance), caused by 4.5 earthquake in Oklahoma
- For around 6 hours before maintenance started, noise in 10-50Hz region rung up in DARM, also found in PSL ISS and ISI channels
- Also around this time, lots of glitches in 10-20 Hz region, caught by Hveto, but these end while the above noise continued. Cause of both of these phenomena are unknown.
- On Wednesday, a tractor was used to plow snow, for some of the time it showed up in CS seismometer 10-30 Hz BLRMS, and dropped range by ~5Mpc.
- No BBH/BNS searches run for any of these 3 days
analog video server restarted
Richard, Jim, Dave:
the h0video IOC was restarted on h0epics2 to re-establish connection to the Knox video matrix switch.
Added channel to DAQ broadcaster [WP5642]
Ryan F, Dave:
the hardware injection ODC channel for EX was added to the DMT broadcaster machine. Only h1broadcast0 was restarted, not the full DAQ.
DMT QFS server connection to QLogic switches [WP5643]
Dan, Carlos:
h1dmtfs0 was disconnected from its SATABOY and routed instead to the two DAQ QLogic switches in the MSR. This required running two longer multimode fiber optics cables from the X2200 to the switches. This is a temporary configuration to allow Dan to perform tests on the SATABOY which is showing errors.
Power cdsfs0 down to add hard drives [WP5637]
Jim, Carlos:
cdsfs0 (NFS server or /ligo) was powered down to install two 2TB HDD into spare SATA slots. Total downtime was < 5mins and all NFS clients reconnected.
CW hardware injection stopped and started
TJ, Dave:
The psinject process on h1hwinj1 was killed. This tested that monit correctly restarted the process (pass) and that the operator station's verbal alarm could be acknowledged to stop it announcing (failed). We may test this again later when TJ has new code.
h1pemmx trivial filter change to test daqsvn updates
Dave:
I made a trivial change to H1PEMMX.txt (added comment line at end) and loaded this into h1pemmx. This will test the periodic commit of these changes to DAQSVN. Change was made at 11:51:23 PST
H1 12/3 - 12/6 Detchar Data Quality Shift Report Summary. Full shift report here: https://wiki.ligo.org/DetChar/DataQuality/DQShiftLHO20151203
J. Oberling, N. Kijbunchoo, B. Weaver
This morning we installed the PBS in the HWSx path. The 2 attched .png files show the desired before and after configuration of the HWSx beam path. Unfortunately we did not have enough room to install the transmitted path as shown in the picture, so we moved HWSX_ALIGN_M1 and installed the lens and detector parallel to the reflected path (see before and after photos). As it stands right now, HWSX_POSN_SENS2 is measuring the beam reflected from the PBS (s-pol (perpindicular)) and HWSX_POSN_SENS1 is measuring the beam transmitted by the PBS (p-pol (parallel)). All optics are turned slightly to prevent back reflections from getting back into the IFO. A short summary of our procedure:
Nutsinee noted the times we blocked each detector and will post that in a follow up comment to this alog. This completes WP 5627.
Here's the time we blocked each detecter:
Detector1 blocked: 18:10:15 - 18:10:21 PST (GPS 1133633432 - 1133633438)
Detector2 blocked: 18:10:50 - 18:10:55 PST (GPS 1133633467 - 1133633472)
I reset the 35W FE watchdog at 18:21 UTC (10:21 PST).
The lights at End X are not functioning. The lighting controller died. I will make arrangements to get a system back up and running but in the meantime take a flashlight to the End station if you need to work down there.
Verified the functionality of the phones near the entrance door at each Mid and End station. Placed a call from the phone and received a call back. Verified that the number registered properly on the phone I called. Mid-X 236 End-X 238 Mid-Y 237 End-Y 239
TITLE: Dec 8 DAY Shift 16:00-00:00UTC (08:00-16:00 PDT), all times posted in UTC
STATE Of H1: Observing 80Mpc
OUTGOING OPERATOR: Patrick
QUICK SUMMARY: IFO is locked at NLN and Observing @ 80 Mpc. EQ bands are around .04µm/s and µSeis is trending down to around .6µm/s. Wind is ≤20mph. MAINTENANCE DAY.
TITLE: 12/08 [OWL Shift]: 08:00-16:00 UTC (00:00-08:00 PDT), all times posted in UTC STATE Of H1: Observing @ ~ 78 MPc. SHIFT SUMMARY: Quiet shift. Rode through ~ 5.6 magnitude earthquake in Chile. A couple of SUS ETMY saturations. Microseism is trending down. INCOMING OPERATOR: Ed
STATE Of H1: Observing @ ~ 81 MPc. QUICK SUMMARY: Microseism has continued to trend down. SUS ETMY saturation at around 09:40 UTC.
TITLE: 12/07 EVE Shift 00:00-08:00UTC (16:00-00:00 PST), all times posted in UTC
STATE Of H1: Observing
SUPPORT: Sheila, Jenne, Evan
LOCK DURATION: 5 hr 19 mins
INCOMING OPERATOR: Patrick
END-OF-SHIFT SUMMARY: Observing for the most part. Wind stays low. Useism continues to decrease. DMT Omega looks clean for the past hour. No noticable EQ band seismic activity. The BS butterfly mode started off high causing a few OMC DC PD saturations but ring down on its own afterward.
TITLE: 12/08 [OWL Shift]: 08:00-16:00 UTC (00:00-08:00 PDT), all times posted in UTC STATE Of H1: Observing @ ~ 78 MPc. OUTGOING OPERATOR: Nutsinee QUICK SUMMARY: From the cameras: The lights are off in the LVEA. The lights are off in the PSL enclosure. I can not tell if the lights are on or off at mid X and mid Y. The lights are off at end X. The lights are off at end Y. The 0.03 - 0.1 Hz (earthquake) seismic band is between ~ 0.01 and 0.1 um/s. The 0.1 - 0.3 Hz (microseism) seismic band is trending down and is currently between ~ 0.2 and 1 um/s. The winds are between ~ 0 and 10 mph. The ISI blends are on 45 mHz at ITMY, ITMX and BS. They are on Quite_90 at ETMX. They are on Quite_90 at ETMY X DOF and 45mHz at ETMY Y DOF. (see attached screenshot) From pinging: CDS WAP is off at the LVEA. CDS WAP is on at mid X. CDS WAP is on at mid Y. CDS WAP is off at end X. CDS WAP is off at end Y.
Useism slowly decreasing (now crossing 5e-1 um/s). Low wind (< 10 mph). DARM ball dropped off the table at 4:57 UTC. Just want to write that down in case something shows up in DARM...
There were several SDF differences. Ones worth noting are the WFS dark offsets (screenshot attached). MICH limiter was also decreased by a factor of 4 but that seems to happen after Cheryl started having problem.
This isn't a big deal since we seem to have most of the cameras displayed on one of the monitors around the room, but I can't switch the image that is displayed on the monitors in the front row, and earlier Corey couldn't change the images in the operator displays.
Observation: It has been reported on the DetChar calls that there are lines observed in the Pcal spectrograms that are wandering in the 10-50 Hz range and some higher harmonics. The worry would be that this is actually on the light and causing an extra force on the optic, albeit at several orders of magnitude less than the nominal Pcal injection lines.
Investigation: Taking a DTT spectrum of the calibrated PD readback channels, H1:CAL-PCAL(X|Y)_(R|T)X_PD_OUT_DQ (apparently calibrated in Newtons of force applied to the optic--helpful!), we can easily see peaks corresponding to the injected lines (see attached, H1pcalYpd.pdf). Conveniently, since the channels are calibrated, the force applied to the mirror is within ~1% at the injection frequencies. So, if the observed wandering lines were actually on the light, then we would expect to see the lines at the the same amplitude in the two channels. Instead, there is ~25% difference in peak values for an example wandering line near 15 Hz.
This would suggest the line is not on the Pcal laser light. Robert S. suspects these Pcal wandering lines are more likely a DAQ issue. He says that he has observed other wandering lines within a factor of a few of the DAQ noise floor in many PEM channels. Recall that for the Pcal channels, all of them are being read into the DAQ on the same ADC card, so it's not surprising that these wandering lines are seen in many channels (see attached, H1pcalYall.pdf).
Additionally, due to the large amount of change in the observed line frequencies, this would eliminate mechanical resonances as a culprit.
I checked for coherence between Pcal PD readback and the nearby magnetometer, H1:PEM-EY_MAG_VEA_FLOOR_(X|Y|Z)_DQ, but did not find any significant coherence at the fundamental wandering line frequency seen recently, ~15 Hz (see attached, H1pcalYpdMag.pdf). Also, the nearby magnetometer shows no peak in the spectrum at ~15 Hz.
Conclusion: It would seem then that the wandering lines in Pcal are more likely a DAQ issue than a Pcal issue.
This explanation seems plausible based on a study from 2013 done during the HIFO-Y test at Josh's request (see slides I showed at the Hannover Sept 2013 LVC meeting). Attached are a couple of slides showing spectrograms on different days for a terminated DAQ channel.
