Shift Summary: Ran A2L DTT check – Pitch and Yaw are a bit elevated. As LLO is down, dropped out of Observing to run corrective script. A2L script finished with errors. Back to Observing. Spoke with Keita about the A2L Script. See aLOG #34763 for details. Successfully ran the script from a Controls terminal. Pitch and Yaw are now below the reference.

Remained lock for the entire shift. No issues or problems to report.

   A good first half of the shift for data collection. No problems or issues to report. 

   Successfully ran the A2L script from a Controls terminal. Keita is looking into the permissions needed to run the script from the Ops terminal. 

I am on site this morning to inspect the access roads down the arms and found that Y arm is partially blocked, X are is mostly blocked.
 
I am trying to reach the landscapers at the moment to bring them out tomorrow at noon to start baling on the Y arm. This should give them ample time to clear that road by Tuesday morning and allow the required liquid nitrogen delivery.
 
I have informed Keita of this plan. 

   There were errors in the A2L script when I ran it this morning. 

   TJ had reported a problem with the script a couple of weeks ago. I had put it on the Ops white board. As the A2L line had been erased from the Ops white board, and there were no aLOG entries concerning the script, I assumed it had been fixed. 

   After running the script with errors, the A2L is now worse than before the script ran. The low frequency noise is elevated. Range is still over 65 Mpc, so will leave it to the Monday crew.   

   The errors are captured in the two attachments.    

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.

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.

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. 

      

Miriam, Hunter, Andy

A subset of blip glitches appear to be due to a glitch in the ETMY L2 coil driver chain.

We measured the transfer function from the ETMY L2 MASTER channel to the NOISEMON channel (specifically, for the LR quadrant). We used this to subtract the drive signal out of the noisemon, so what remains would be any glitches in the coil drive chain itself (and not just feedback from DARM). The subtraction works very well as seen in plot 1, with the noise floor a factor of 100 below the signal from about 4 to 800 Hz.

We identified some blip glitches from Feb 11 and 12 as well as Mar 6 and 7. Some of the Omega scans of the raw noisemon signals look suspicious, so we performed the subtraction. The noisemons seem to have an analog saturation limit at +/- 22,000 counts, so we looked for cases where the noisemon signal is clearly below this. In some cases, there was nothing seen in the noisemon after subtraction, or what remained was small and seemed like it might be due to a soft saturation or nonlinearity in the noisemon.

However we have identified at least three times where there is a strong residual. These are the second through fourth plots. We now plan to automate this process to look at many more blip and check all test mass L2 coils in all quadrants.