TITLE: 07/22 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Cheryl
SHIFT SUMMARY: Lost lock at 02:32 UTC. Upon relocking I got stuck at REDUCE_RF45_MODULATION_DEPTH and the OMC DCPDs started saturating (see mid shift report). I then broke the lock intentionally because the DARM spectrum was getting worse and I was afraid that I was ringing something up. Upon relocking the OMC DCPDs started saturating at DC_READOUT and I again broke the lock intentionally. At one point I also broke the lock by putting too high of a gain on one of the ITMY violin damping modes and tripped the RMS WD. I have since spent the majority of the evening sitting at ROLL_MODE_DAMPING and attempting to damp violin modes. I succeeded in damping ITMY mode 5 which seemed to bring down the spectrum considerably. In the first attached image the black line is a reference I took earlier (I'm sorry I didn't note when). I did not have much success damping ETMX mode 4. The only thing I changed was the damping filter gains. I have attached screen shots of the current settings. Towards the end of the shift I changed the bounce mode damping gains for all the optics from .1 to .5 per Cheryl's suggestion.
LOG:

00:46 UTC Kyle called to say he was onsite and would be in the VPW.
01:10 UTC Kyle in control room
01:11 UTC Kyle out of control room
01:32 UTC Kyle leaving
01:49 UTC Verbal alarms GRB alert
02:32 UTC Lock loss
02:48 UTC Verbal alarms GRB alert. Still relocking.
04:31 UTC Verbal alarms GRB alert
05:24 UTC Kim and Dan setting up telescope in parking lot

Lost lock at 02:32 UTC. No immediately apparent cause. Relocking. Currently at REDUCE_RF45_MODULATION_DEPTH.

TITLE: 07/22 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 51Mpc
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
    Wind: 13mph Gusts, 10mph 5min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.05 μm/s 
QUICK SUMMARY: No issues to report.

The glitchy periods at 10 UTC today, and 8 UTC on July 20, seem to be due to overflows in all of the test mass L2 coils. The cause of the overflows looks to be CSOFT pitch.

The attached plots show timeseries of CSOFT pitch and ITMX L2 master for one quadrant, then a spectrogram of the coil signal. It looks like most of the power is in the 2.8 Hz pitch mode of the test masses. From the summary pages, it looks like the RMS of CSOFT pitch has crept up over the last few months.

When the coil drive goes over 131,072 counts, the DAC overflows and the coil glitches. It's possible that I have things backwards, and the glitch comes first and the overflow is a symptom, but that doesn't seem to match the behavior of the RMS at non-glitchy times.

Is there a way to get CSOFT pitch lower, or maybe suppress some of the feedback at 2.8 Hz (which I think is the biggest contributor)?

TITLE: 07/22 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 52Mpc
INCOMING OPERATOR: Patrick
SHIFT SUMMARY: Other than a high ETMY violin mode 5, nothing much to report here. I tried a few variations to damp that mode but only managed to ring up others. Currently the RMS is at 5.12, the start of my shift was 5.08
LOG:

• 16:07 Running A2L
• 16:38 Done with A2L, took longer than usual I think
• 19:10 Out of Observing to damp violin modes while LLO is down.
• 19:18 Damping didn't go well. Tried the settings in the wiki and it just rang up modes 3 & 4. I set everything back to how it was before and will let that damp while we Observing. I'll try to damp more once 3&4 settle and if LLO is still down.

FAMIS4737

All oplevs seem to be where they should be, looks good.

Locked at 53Mpc. I ran A2L at 16:07UTC. ETMY violin mode 5 is a bit rang up, I'll try to damp while LLO is down right now, but it doesn't seem like we have had too much luck wiht this mode recently.

TITLE: 07/22 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 53Mpc
OUTGOING OPERATOR: Cheryl
CURRENT ENVIRONMENT:
    Wind: 6mph Gusts, 3mph 5min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.05 μm/s 
QUICK SUMMARY: Calm envirionment, holding at 53Mpc. 

TITLE: 07/22 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 53Mpc
INCOMING OPERATOR: TJ
SHIFT SUMMARY:
LOG:

• H1 stated glitching, so after L1 lost lock I went out of Observe
• ran a2l, also changed BS Oplev yaw gains, glitching continued
• changed BS OpLev Pitch gains, maybe ill advised, but glitching was pretty constant
• relocking had some isses during DRMI, which resolved
• one lock loss at Carm On TR, but then made it through
• SDF - REFL SERVO IN1GAIN setpoint was 5, value was 7
• unsure if it would break the lock to change, so I accepted and put H1 in Observe
• GRB arrived at 12:37:01UTC, but neither L1 of H1 was locked in NLN

TITLE: 07/22 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 53Mpc
OUTGOING OPERATOR: Patrick
CURRENT ENVIRONMENT:
    Wind: 6mph Gusts, 5mph 5min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.06 μm/s
QUICK SUMMARY:

• H1 is locked in Observe for about an hour
• EQ from Chile arrived and caused some glitches
• H1 yaw coherence is a bit high, but leaving as is for now

TITLE: 07/21 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 51Mpc
INCOMING OPERATOR: Cheryl
SHIFT SUMMARY: The biggest trouble has been locking DRMI. PRMI locks easily, but DRMI has had trouble. Prior to the first observing stretch it would keep locking momentarily but not hold. I believe Kiwamu said he saw oscillations in the BS ASC YAW prior to it unlocking. Eventually it just happened to hold. He suggested playing around with the YAW gain for the BS oplev servo (H1:SUS-BS_M2_OLDAMP_Y_GAIN) the next time. Prior to the second observing stretch PRMI would again lock easily, but the StripTool traces stayed low and I could not improve them by moving the PRM or BS. DRMI seemed to have trouble catching lock at all. I played around with the BS oplev servo YAW gain, but found nothing conclusive. Eventually it locked again by chance.
LOG:

23:06 UTC Filiberto swapping BS M2 coil driver for a third unit. Earlier BS M2 coil driver replacement had a 20db gain modification not present in the original. Filiberto getting a third coil driver that does not have this modification.
23:19 UTC Filiberto back
23:22 UTC Starting initial alignment
23:37 UTC Powercycled video2
23:59 UTC Initial alignment done. Jenne had to increase gain on LSC path of X arm IR locking.
DRMI not locking. Locked PRMI. Lockloss during PRMI to DRMI transition.
01:03 UTC Observing
01:27 UTC Damped PI mode 28
05:14 UTC Lock loss
PRMI is locking easily, DRMI is not
06:06 UTC Observing
06:17 UTC Damped PI modes 27 and 28

Made it back to NLN at 00:59 UTC. DARM noise appears unaltered. Observing.

The plot is a wide bandwidth frequency noise spectra which can be compared to previous alog 31554. There is no significant difference.

aLOG 37455

This afternoon the ESD electronics at EY were placed on temporary power supplies. This is part of the ongoing line hunting investigation.

aLOG 37666

Looked at the BS UR signal as reported by Jenne. Disconnected noise monitor outputs of coil driver and shorted the inputs to the AA chassis. From here we could see that UR has ~10dB gain difference than the other channels. Power cycled both the AA and coil driver, transfer function showed no change. Coil driver S1000355 in SUS-C6 slot U26 was replaced with S1100039. Transfer function for all signal outputs the same.

F. Clara, J. Driggers, R. McCarthy

TITLE: 07/21 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Aligning
OUTGOING OPERATOR: Ed
CURRENT ENVIRONMENT:
    Wind: 15mph Gusts, 11mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.05 μm/s 
QUICK SUMMARY:

The BS M2 coil driver was swapped. Jenne, Filiberto and Kiwamu are now troubleshooting issues with actuating on M2.

TITLE: 07/21 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Aligning
INCOMING OPERATOR: Patrick
SHIFT SUMMARY:

Shift was rather un-eventful. There was planned commissioning at 20:00UTC (see previous aLogs). The artifact from that is a BS that won't behave. Jenne is working on it with Fil, currently. Handing off to Patrick.
LOG: