TITLE: 06/16 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 60Mpc
INCOMING OPERATOR: Jeff
SHIFT SUMMARY:

Locking was dodgy. After a couple of failed attempts right at Noise Tunings and NLN, I got H1 locked but not wiothout some RF45 nastiness. It settled down after a while. A2L was looking pretty incoherent so I ran the script to put that back together to no positive effect on the noisy DARM spectrum. Handing off to Jeff B.
LOG:

7:41 1st attempt at locking failed at NLN!

7:45 adjusted X wrong fiber polarity from 15% to 11% (that's all I could get out of it)

8:59 Two failed attempts at NLN. Lock fails at Noise Tunings. Just got OMC DCPD saturation at DC readout but no lockloss.

9:28 Holding at LOWNOISE_ESD_ETMY  there was heavy RF45 glitching. I don't know if it was because I was holding at this state?

9:33 Intention bit Unsiturbed. Had to accept a handful of  SDF diffs.

10:30 Running a2l

I have changed a couple of the tuning loops at EX to try and slow the heater reaction time, specifically, the P&I loops on the heater control from 11.5 to 10.5 and the supply air temperature reset up from 60degrees to 62degrees F.

10:36UTC Back to Observing

• It looks as if our old friend the 45MHZ glitching is back.
• DARM noise elevated through most of the mid range frequencies and something fishy creeping around just above 4K
• There were a handfull of SDF diffs that had to be accepted for Observe mode. Images below.
• PI mode 26 rang up and I had to change a bit of phase and the PLL frequency to compensate. the SDF Diff was accepted for Observation

This IFO is not ok for detections.

TITLE: 06/16 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
    Wind: 21mph Gusts, 15mph 5min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.22 μm/s
QUICK SUMMARY:

Tj performed initial alignment prior to his departure. He told me of his re-locking woes. I've just started the locking process. We'll see...

TITLE: 06/16 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Ed
SHIFT SUMMARY: Started the shift with some commissioning work and a few lockloss. Then after the commissioners left I got it locked, but the lock looked glitchy and not great. It broke a bit ago and I started an initial alignment hoping that may be the cure. Good luck Ed.

The EX tempurature may have dropped a bit as well. I attached a plot of a bunch of different sensors that Robert suggested I watch. The FMC channels dont show much changing, but the PEM tempurature channel does show a drop today. These are 4 day thrends.
LOG:

• 00:37 Pep to EX to turn picomotors back on
• 01:08 GRB but we were not locked and were having troubles getting relocked
• 02:23 Observing
• 06:20 Lockloss, cause unknown

Didn't seem like a very robust lock, I was waiting for it to go. The wind is picking up a bit, but nothing to worry about.

Had a tough time getting the IFO to stay locked. Everything seemed well aligned but after DC_READOUT it would get unstable and lose lock. Going from PRMI to DRMI seldom worked properly. Jenne suggested that I make sure that the L2_DRIVEALIGN_P2L gains were correct for all quads. The ITMs looked good but the ETMs were not, so I set those back to their values from this morning. This did not rectify the PRMI/DRMI issue, but we did make it all the way up this time.

Shots attached of a few SDF diff that I accepted.

• The first thing I did this morning was turn on the ISS 3rd loop again, after a measurement.  The measurement was taken with the loop open, but a gain of 1 in the filter bank, which used to be the nominal gain.  Today I have been using it with a gain of 0.5.
• With the 3rd loop on and the SRM controlled on the dither, I have been using the PR3 spot move state to move the beam on the POP QPD and look for a spot with lower jitter.  
• I found a better spot right away, which was not as good as the position we were in when we first came back from the vent. 
• I wanted to explore the pop positions in a less random way by scanning the positions on the POP QPD.  I got partly through this but had a lockloss and am now running out of time. 
• I also ran A2L twice, at two of the extreme positions on the POP QPD. 

The second attached screenshot shows some improvement in the DARM spectrum (gold has been our normal spectrum since the spot position move last week, blue is for a different position)

Summary of the DQ Shift from Monday 12th June to Wednesday 14th June (Link for full report):

• Total 64.7% duty cycle (88.8%, 51,4%, 54.1%) for three days; BNS inspiral range around 60-65Mpc.
• There are lock losses due to earthquakes in Guatemala and Greece for all days.
• Several suspension overflows from the OMC alignment during three days, which is associated with the range drops.
• PyCBC live produces high new-SNR triggers due to "BLIP", "Scattering", "Koi-fish" glitches.
• On the1st and the 3rd days, the round 1 winner of hveto produced a microphone glitch at end station of Y-arm that seems to be caused by an air compressor but unclear.
• On the 3rd day, there are many glitches with huge SNRs (above 2000)

TITLE: 06/15 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Commissioning
OUTGOING OPERATOR: Jeff
CURRENT ENVIRONMENT:
    Wind: 10mph Gusts, 7mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.17 μm/s
QUICK SUMMARY: Commissioning activities going on at both sites, we just broke lock here.

Shift Summary: Ran A2L check script at the shift start. Both Pitch and Yaw are below the reference line. Reran the A2L check script about 90 minutes later and found Yaw had rung up to about 0.6. Commissioners have the IFO so Sheila can run some tests. Took this break from Observing to run the A2L Repair script.

Have been commissioning all shift. Lost lock a couple times. After a tweak or two to the BS and PRM, relocked without too much difficulty. Everything appears normal at this time.  

A new line at 86 Hz has appeared in the DARM channels after the vent.

After running BruCo, I've seen that that frequency was coherent with some PCAL channels: https://ldas-jobs.ligo-wa.caltech.edu/~pep.covas/bruco/1181560000/

I attach two different plots showing the differences between before/after the vent for the DARM channels and for  three different PCALX channels . The "before" data is from 07/05/2017 09:00 UTC, and the "after" data is from 15/06/2017 09:00 UTC.

There have been a number of good earthquakes this week so Sheila and I have talked about their impact on duty cycle a bit this week. There was an earthquake on the 12th in particular that was pretty interesting, because it was just a little bigger (~3-4 micron/s rms) than the biggest we've ridden out so far during O2 (~1.5 micron/s rms, we had a pretty good  example of that last night). One aspect that I've looked at recently was comparing our O1 & O2 duty cycle vs .03-.1 hz BLRMS ground velocity.

The first attached plot shows a cumulative plot of the eq band ground velocities (i.e. the x axis is RMS ground velocity measured by the ITMY STS2, the y axis is the percentage of the total run the ground was above the x axis value). It's interesting to  note that O2 has been pretty gentle in all respects compared to O1 at LHO (the O1 curve is above the O2 curve for much of this plot), so this may explain some of our good duty cycle this run.

The second plot is a cumulative duty cycle (i.e. x-axis is again RMS ground velocity, y-axis is now the percent time the ISC_LOCK guardian was above DC READOUT while the ground was above the x-axis value). Again, some of the improved duty cycle is from the generally quieter O2 environment, but above 100-200 nm/s I think earthquakes are the main difficulty.

Some studies I would like to see (that this plot obscures) is what are the statistics on the largest peak ground velocities we can survive (similar to Chris Buchanan's study for O1, https://dcc.ligo.org/DocDB/0124/G1600348/002/Buchanan_O1_EQs_Feb2016_Final.pdf ) and does that change with the time of year? I'm not sure I'm clever enough for those.

   Virgo will be starting an Engineering run this weekend. In support LHO will not do any commissioning this Friday and possibly next Friday. 

   Reviewed last weeks work efforts and next Tuesdays planned maintenance items.  

Adjacent annulus ion pumps (AIPs) look normal so not due to room temperature increase but instead an issue with this particular unit.  A vacuum team member will investigate tomorrow.

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