TITLE: 10/10 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Preventive Maintenance
OUTGOING OPERATOR: Ibrahim
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 7mph Gusts, 6mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.27 μm/s
QUICK SUMMARY:

IFO was Locked but not observing.
Operator assistance was required.

DIAG_MAIN message:
PSL_FSS_TPD:Refcaf Transmission low, fix Alignment
 

TITLE: 10/09 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 144Mpc
INCOMING OPERATOR: TJ
SHIFT SUMMARY:

Nice uneventful shift with H1 at 9.5hrs of lock.
LOG:

• ~2355 Finishing Corner Station HVAC tests (robert)
• 0004-0035 Run  down Y-arm (camilla & RAL co.)

H1 humming along just under 150Mpc after 5.5+hrs of lock.

Getting "transmission low" DIAG_MAIN alerts for the PSL's Reference Cavity (see attached).

The 120 Hz peak in DARM is produced by the overlap of a new HVAC peak and a PSL periscope peak. I think the peak in DARM can be reduced by reducing the overlap, by manipulating the HVAC to try to move or reduce the new peak and tuning the periscope resonances with small weights. I made a set of minimal HVAC manipulations to inform my entry into the PSL tomorrow. The times and activities are listed below:

Oct 9, UTC

22:42 Heater 2A disabled

22:48 Heater 2A enabled

22:53 LVEA Supply Fan 2 disabled

23:03 LVEA Supply Fan 2 enabled

23:14 LVEA Supply Fan 2 disabled

23:24 LVEA Supply Fan 2 enabled

23:34 LVEA Supply Fan 2 disabled

23:44 LVEA Supply Fan 2 enabled

I wanted to vary the flow of supply fan 2 but found that setting the vane percentage did not work. So I gave up and just shut it off. This made dramatic improvements in the periscope motion and DARM (see figure). I would argue that we could turn SF2 off as it has the lowest flow rate, about 4,000 CFM, so flow would drop from about 31k CFM to about 27k CFM for the LVEA. I'll still plan on going into the PSL to move the periscope resonances in case this doesnt work.

Robert

TITLE: 10/09 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 146Mpc
OUTGOING OPERATOR: Austin
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 10mph Gusts, 8mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.27 μm/s
QUICK SUMMARY:

Received the hand-off from Austin and am ready to continue a smooth-sailing shift with H1 locked for 1.5hrs.  There are minor notes of the microseism taking a turn up over the last 18hrs, and it is also a bit breezy out now (but not too bad). 

TITLE: 10/09 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 146Mpc
INCOMING OPERATOR: Corey
SHIFT SUMMARY:

- 17:26 - 18:38 UTC - flipped into COMMISSIONING mode to take FF measurements for LSC retuning

• Back to OBSERVE @ 18:38

- Lockloss @ 20:27 due to commissioner SRCL measurement

• ISC went through MICH FRINGES, but locking process was automated, back to NLN @ 21:33/OBERVE @ 21:46

LOG:

Lockloss @ 20:27, due to LSC measurement.

H1 has been locked for 14 hours now. We went out of observing @ 17:26 for some LSC measurements and have just gone out of observing again (20:16) to retake said measurements, while we wait for LLO to fully recover from their dolphin crash.

[Camilla, Jenne]

Some belated notes about trying LSC FF back on Sept 21st, as well as notes on measurements taken today for retuning the LSC FF using ETMY PUM.

LSC FF with ITM PUM did not work when I tried it on 21Sept2023 (turning on MICH FF worked okay, but turning on SRCL FF killed the lock.  We have seen this before in years past at LHO that we cannot use SRCL FF with the ITMs, likely due to a parasitic loop). The measurements and fits for that were in alog 72862. 

Measurement for MICH FF using ETMY PUM taken 20 Sept 2023 (I forgot to alog).  Lost lock trying to gather SRCL FF data at that time.  Gabriele fit the MICH FF data and gave us a filter (below, and attached).

Camilla and I tried that filter from September:

• Plotted the filter in Foton, removed a pole/zero pair around 63 Hz with Q of 286 that was unneccessary.  Removing this pair made almost no difference to the mag or phase.
• Checked step response, it's very similar to the currently-in-use filters (step is done in 5-6 seconds). 
• Prepared for sending LSC FF to ETMY PUM (and not to ETMX test mass) - these are the things we'll need to do in Lownoise_length_control, if we're going to use these filters:
  • LSC FFs both ramped off
  • LSC FF matrix off the EX, leave on the EYs at -1.
  • LSC main darm outmtrx zeros to EY
  • Make sure EY on with gain of 1 through ISCINF, L3 LOCK, L2 LOCK.  L2 lock has on Qprime filter, which is a f^2.
• Turned on MICH FF using Sept 21st filter.
• Sept 21st filter didn't work well.  Just going to turn it off, and measure both MICH and SRCL from scratch.

Measuring MICH and SRCL FF, while still using EY PUM:

• With LSCFF still set to actuate on EY PUM, measured MICHFF exc with only the highpass on. 
• Then turned back on *old ETMX* FF and measured MICH excitation (FF only on to give better SNR with DARM, so shouldn't matter which FF).
• Measured SRCL excitation
• Switched off LSCFF, re-set-up actuation to ETMY PUM, then measured SRCLFF excitation with only it's two highpass filters on.  This measurement, in the past, caused a lockloss, so we took a little time to tune the excitation to give okay coherence up to ~500 Hz, while not killing the lock.
• DTT templates are all saved in .../userapps/lsc/h1/scripts/feedforward/ . 
• Work on fitting these data is ongoing.

MICH filter using ETMY PUM from 20 Sept 2023, plotted in attachment: zpk([-8.392330076183118+i*49.39248514742469;-8.392330076183118-i*49.39248514742469;-1.046997552323544+i*62.74012764734476;-1.046997552323544-i*62.74012764734476;-0.195079334716182+i*111.0307750783754;-0.195079334716182-i*111.0307750783754;-67.32125480645517+i*108.7955724988948;-67.32125480645517-i*108.7955724988948;-0.7011570088542948+i*401.6350155234317;-0.7011570088542948-i*401.6350155234317;-2.779238087179218+i*518.2808819075473;-2.779238087179218-i*518.2808819075473;-317.3841576035709+i*1079.288485296243;-317.3841576035709-i*1079.288485296243;-178.8519649481057+i*1320.885890800788;-178.8519649481057-i*1320.885890800788;49.42179558079376;-126.1091578653822;-342.6998780810434;-387.3921871872612],[-6.612825148760598+i*18.03485413750199;-6.612825148760598-i*18.03485413750199;-10.51113766874398+i*51.44409984903976;-10.51113766874398-i*51.44409984903976;-1.193259418463134+i*62.71361669508964;-1.193259418463134-i*62.71361669508964;-0.184848231243519+i*111.3871852754391;-0.184848231243519-i*111.3871852754391;-111.7020413312252+i*111.668875814675;-111.7020413312252-i*111.668875814675;-0.7097877123317881+i*401.6301823509122;-0.7097877123317881-i*401.6301823509122;-2.787645529701059+i*518.2913243267907;-2.787645529701059-i*518.2913243267907;-335.0087359797044+i*492.7511937802536;-335.0087359797062-i*492.7511937802536;-227.3099122149132+i*1161.919607907957;-227.3099122149132-i*1161.919607907957;-100.9775239200197+i*1321.691603918431;-100.9775239200197-i*1321.691603918431],-69.94521247458729)

Mon Oct 09 10:10:33 2023 INFO: Fill completed in 10min 29secs

Gerardo confirmed a good fill curbside.

FAMIS 19997

There was a slight temperature increase in the laser room starting last Tuesday, but trending further back it looks to be within the regular range, plus there was no work that I could recall from that day which would have altered the temperature.

The FSS TPD signal is continuing to drop; Jason is planning on an alignment tomorrow during maintenance.

TITLE: 10/09 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 145Mpc
OUTGOING OPERATOR: Ryan C
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 5mph Gusts, 4mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.24 μm/s 
QUICK SUMMARY:

- IFO is in observing mode and has been locked for about 9 hours

- CDS/SEI ok

- Got 3 alerts for DMs this morning, LVEA 6/10 and PSL 102 (all 300 nm)

TITLE: 10/08 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 147Mpc
INCOMING OPERATOR: Ryan C
SHIFT SUMMARY:

Two locklosses this shift (one from a "local" earthquake and the other not so clear).
LOG:

• 0222 Lockloss--->Local Washington EQ takes H1 down (after a lock of 18.25hrs)
• 0329 Observing
• 0516 Lockloss
• 0622 Observing

Full summary of DQ shift here

Brief summary below:

• Duty cycle for each day: 97.0%, 45.0%, 57.5%, 80.1%, 76.6%, 95.1%, 88.2% for an average of 89.7% on the week
• A lot of seismic activity early in the week, especially wind, likely due to storm off coast of Washington
• Later in the week the violin modes were really rung up during locking, but seemed to finally settle by Sunday
• Monday had the highest duty cycle and maintained lock all day with range consistently between 153 and 159. Went out of observing briefly (about an hour) for some comissioning while LLO lost lock.
• Tuesday was the lowest duty cycle, lock loss early in the day and it took a long time to relock due to high microseism, then went into maintenance time.
• Wednesday still fairly low duty cycle, lost lock at 17:45 and had trouble locking rest of the day due to high winds
  • Wed was the first day I noticed the big range drop at 17:00 UTC, seem to be correlated with crypopump at the CS
• Mon-Wed saw a lot of consistent low SNR glitching around 120 Hz
• Thursday started unlocked, still very high winds. Once relocked range continued to increase into high 150s until 17:00, and saw a range drop once again
  • Several earthquakes on the day but survived most of them
  • 120 Hz noise started dying down
• Friday had an early lockloss but got back to observing around 02:53, went out of observing for comissioning a couple of times.
  • Once again saw the drop in range at 17:00 UTC from 153 to 140 Mpc
• After an early lockloss Saturday went back into observing around 01:30 UTC and spent the rest of the day in observing
  • Drop in range at 17:00 UTC for 4th straight day, range seemed to bounce back a bit quicker this time but seemingly same cause
• Sunday was fairly uneventful. Couple of locklosses on the day but observing for most of the day. A bit more ground motion towards teh end of the day so range was down a bit.
  • Violin modes starting to really settle
  • Out of lock at 17:00 but saw same noise on cryopump

H1 clearly shaken out of lock from a M4.3 Puget Sound earthquake (Observatory Mode taken to EARTHQUAKE) at 0222utc.  Green arms looked aligned, but still swerving a bit, so I took them to INCREASE FLASHES to wait out the seismic waves.  In Earthquake Mode state from 0222-0233utc.

TITLE: 10/08 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 133Mpc
OUTGOING OPERATOR: Oli
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 12mph Gusts, 8mph 5min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.19 μm/s
QUICK SUMMARY:

Other than the recent quakes Austin noted, H1 is humming along just fine at 15.25hrs.  Environmentally, microseism has been decreasing last 24+hrs, winds are low.  CDS is good.

TITLE: 10/07 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 149Mpc
OUTGOING OPERATOR: Oli
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 7mph Gusts, 5mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.32 μm/s
QUICK SUMMARY:

H1's been locked for just over 10hrs.  (Wow--interesting to see seismis noise ever since I left last night!  Lots of earthquakes around the globe which made for a rough overnight!)  Quick scan of the Control Room and everything looks good right now.