H1 ISI CPS Sensor Noise Spectra Weekly, FAMIS 12876

I ran the scripts for this FAMIS task on Dec. 2, while the site was still experiencing high useism.  The xterm window did not produce a list of any sensors being over threshold, and by eye it looks like there might be some sensors on BS that had (or have) elevated noise.

• BS: BS_ST1_CPSINF_V1_l and BS_ST2_CPSINF_V1_l (dark red) are both elevated, and possibly also  BS_ST1_CPSINF_H3_l

I also noticed peaks at around 6.9Hz, 7.6Hz, and 8.0Hz that were not in the spectra from Nov. 18th, in ITMY, HAM5, and HAM6.

In all attachments with two side-by-side plots, the current spectra is on the left, and the spectra on the right is from alog 53315, Nov. 18th.

I checked the current spectra against the Nov. 25th plots, alog 53473, and the changes noted above are new since those spectra.

 

Ops Day Shift Summary

TITLE: 12/08 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 114Mpc
INCOMING OPERATOR: Jim
SHIFT SUMMARY: ETMY violin modes 18 & 20 are still high, I was unable to find any setting that worked. Almost a 73 hour lock though.
LOG:

• 1820 Observing
• 2110 Out of Observing to try to damp these modes again
• 2155 Observing

Ops Mid Shift Report

I have been unable to find a combination of phases and gains to reliably damp these modes. I took a very fine BW measurement of them and it looks like our bandpass filter for mode 18 is 2mHz off (BP centered around 1000.294Hz, actual 1000.296Hz), but I can't imagine this is large enough to stop any damping. 

The only time I have been able to damp mode 18, it was only at a rate of around 0.1 /sec and it largely broadened the RMS values for mode 20. Actually it seems to show up in the DARM BLRMS and other 2nd order violins with a period of ~88sec.

I'm currently leaving the two modes without any gains, where everything is stagnant, while I find some other potential solution.

It seems that the gain setting for ETMY mode 20 with a gain of 1 was potentially ringing up these modes slowly over the last day (see 2nd attachment). This gain setting is not in the guardian, so the node didn't have catch it.

Observing at 1820UTC but with High Violins

I may have found a setting that is very slowly damping ETMY mode 18 (1000.295Hz), so I brought us back to Observing for now. These modes are still high though and I can still see them on the glitch gram, so I'm tagging DetChar to give them a heads up.

Ops Day Shift Transition

TITLE: 12/08 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Preventive Maintenance
OUTGOING OPERATOR: Corey
CURRENT ENVIRONMENT:
    SEI_CONF state: WINDY
    Wind: 4mph Gusts, 2mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.32 μm/s
QUICK SUMMARY: 65 hour lock, but we are currently out of observing because ETMY violin modes 1000.30 & 1000.31Hz are rung up quite high. Since these are right next to each other, damping is proving to be difficult. The bandpass filters for each of them are broad, about 0.1hz, so it covers both of the modes for each filter bank. For right now I'll just try to find a phase and gain combo that may work before trying to change any filters.

I will stay out of Observing for the time being because the violins are clearly seen in the DARM BLRMS, glitch grams, and our range. If I get their log RMS values close to 5 I'll most likely go back into Observing.

OWL Operator Summary

TITLE: 12/08 Owl Shift: 08:00-16:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 112Mpc
INCOMING OPERATOR: TJ
SHIFT SUMMARY:

H1's been locked 65+hrs....but the ETMy violins are ringing up.
LOG:

• ETMy violin mode 18 & 20 rang up toward the end of the shift.  (handing this off to TJ)
• There were some SPM Diffs which were flashing for the TRamps of the ISI ST2 RX & RY ISO filter banks (so I returned them to 5sec from 0).

ETMy MODE 18 (1000.30Hz) Rung Up

Around 14:55 notice H1 range took a step down at 13:37. 

Only obvious change was increase in 500-2000Hz bands via the BLRMS of DARM.  This lead me to look at violin modes and sure enough we had a big line on DARM spectra around 1kHz.  Looking at the Violin Mode medm Screen & DTT, it pointed toward: 

ETMy's MODE 18 (as well as a rung up MODE 20).

Unfortunately, I could not find newer instructions for damping violin modes (I could have sworn Rahul had something new because I remember Ed going through a procedure where he manipulated the VIOLIN_DAMPING guardian node.  The only Violin mode instructions I could find were the old ones Nutsinee wrote up.)  So after searching old alogs & through wikis for a few minutes, I then decided to take action:

• Took VIOLIN_DAMPING to DAMPING_ON_SIMPLE (this took me out of OBSERVING at 15:24). 
• Began tinkering around with mainly the gain and some phase for MODE 18 (but I also tried tinkering with MODE 20.
  • NOTE:  Mode 18 (1000.30Hz) was OFF up to this point (i.e. a gain of 0)
  • NOTE:  Mode 20 (1000.31Hz) was ON with a gain of 1 (and its ndscope was definitely increasing....due to being rung up by Mode18?)
• Made some strides with Mode 18 (not great, but a decrease).  
• Took VIOLIN_DAMPING back to IDLE (no change), and then DAMPING_ON_DC & this seemed to undo what I had been doing!
• Went back to DAMPING_ON_SIMPLE (i.e. started over).
• At this point, TJ came in & I aprised him of the situation.  I mentioned I couldn't find O3 instructions for Damping Violins and he mentioned there was recent work with violins to allow changes while in Observing (so I missed that).
• They were both increase when I handed it off to him, but he has stabilized both modes by taking them to a gains of 0.
• In TJ's hands now!

Mid Shift Status

H1 has been locked over 60.75 hrs.  Calm & smooth sailing continues.

Transition to OWL Log

TITLE: 12/08 Owl Shift: 08:00-16:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 113Mpc
OUTGOING OPERATOR: Jim
CURRENT ENVIRONMENT:
    SEI_CONF state: WINDY
    Wind: 3mph Gusts, 2mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.33 μm/s

Decently quiet night with low winds and moderate/mid-range microseism....no noticeable EQs on EQ-band for last 24-hrs.
QUICK SUMMARY:

Approaching 57hrs of lock for H1 (almost 2hrs of observing).  All is green on DAQ/VAC/OPS Overviews.

Access System Note:  Noticed EY door flashing alerts for the West Egress door and Mechanical Room Egress door (these have been observed before), but a new one was the Exterior Roll Up Door.  I toggled the "Force" button for these under the Hardware window to clear these flashing alerts.)

Shift Summary

TITLE: 12/08 Eve Shift: 00:00-08:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 112Mpc
INCOMING OPERATOR: Corey
SHIFT SUMMARY:
LOG:
6:08 Squeezer unlocked, knocking us out of Observe

6:10 Squeezer relocked, back to observing

Ops Day Shift Summary

TITLE: 12/07 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 113Mpc
INCOMING OPERATOR: Jim
SHIFT SUMMARY: Locked for almost 49 hours. Nothing to report.
 

Ops Mid Shift Report

Locked for 45 hours at 114Mpc, no issues to report.

Ops Day Shift Transition

TITLE: 12/07 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 113Mpc
OUTGOING OPERATOR: Patrick
CURRENT ENVIRONMENT:
    SEI_CONF state: WINDY
    Wind: 4mph Gusts, 2mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.32 μm/s
QUICK SUMMARY: Locked for almost 40hours. Slightly elevated useism.

Ops Owl Shift Summary

TITLE: 12/07 Owl Shift: 08:00-16:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 113Mpc
INCOMING OPERATOR: TJ
SHIFT SUMMARY: Stayed locked and in observing entire shift. Damped ETMY violin mode 20. Did not need to got out of observing to do so.
LOG:

08:11 UTC Set ETMY violin mode 20 gain to 1. Value did not get overridden and it looks like that made it start damping.

TJ came in early to take over.

Ops Owl Mid Shift Status

Have remained locked and in observing. I believe I have damped ETMY violin mode 20 by setting its damping filter gain to 1. I did not have to go out of observing to do so. This gain must not be set to 0 by guardian.