• 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.  

   Out of Observing while the commissioners work on the IFO. The wind is up into the upper teens. Primary and secondary microseism are both trending upwards. No real issues or problems to report at this time. 

~1000 hrs. local time 

A measured pressure of 14 microns was observed 5 minutes after having isolated the pump.  So, an improvement from 230 microns to 14 microns in ~45 hours of pumping with a two-stage scroll pump.  

I vented the pump connection and added an O-ring valve in series with the existing O-ring valve (see attached image) then evacuated the space between them.  This was done in the hopes that the existing O-ring valve has been the source of this dewar's consistently poor vacuum retention (leaky valve?).   

This completes WP #7037

One recommendation from the June 6-9 CDS Face-2-Face meeting was that the teststands need their own alog as work get geared up for post-O2 upgrades. Keith and Dwayne have created the new alog at LLO:

Test Stand ALOG

You should not see any more X1 alogs in this alog from now onwards.

   Trouble with VerbalAlarms this morning. The reporting time was off by about 2 minutes and it did not squawk at an intention bit change. Restarted VA. Reporting time is still off by two minutes. Will keep an eye on it.   

TITLE: 06/15 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 59Mpc
INCOMING OPERATOR: Jeff
SHIFT SUMMARY: Observing entire shift. Might want to keep an eye on verbal alarms. It did not announce the time at 08:00 UTC so I restarted the alarm handler computer and the script.
LOG:

08:17 UTC Verbal alarms did not announce the time at 08:00 UTC. Restarting alh computer.

Quiet shift so far. Just starting to ride out a 4.8 magnitude earthquake in Bolivia.

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.

No action is required by the Control Room operator.

WP 7031
alog 36571
 

A EL3104 analog input Beckhoff terminal was replaced from EtherCAT End Station Chassis 3. Alog 36571 reported CH3 & CH4 on terminal 7 showing an offset. Used a voltage calibrator to verify offset was from EL3104 terminal and not upstream.