TITLE: 03/30 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Earthquake
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: EARTHQUAKE
    Wind: 8mph Gusts, 5mph 3min avg
    Primary useism: 0.51 μm/s
    Secondary useism: 0.16 μm/s
QUICK SUMMARY:

• 12:31 UTC lockloss (EQ)
• We're currently down from a 7.0 from Tonga, probably another two or three hours till the ground motion subsides enough for locking
• SUS OPO and FC2 were tripped along with HAMs 2,3,4,5,7,8's ISIs

TITLE: 03/29 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 152Mpc
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY:

Quiet shift with H1 locked the whole time (currently at about 7.5hrs).  Squeezed in a successful Calibration while L1 was down.  Secondary microseism continues downward trend from the last 24+hrs (touching 50th percentile line).  Winds touched ~20mph, but have mostly meen much calmer.
LOG:

• 0127-0157 Saturday Calibration measurement

After noticing that L1 was down, started running Calibration measurments since H1 was now thermalized.

Measurement NOTES:

• Following instructions (link)
• H1 at NLN for for over 3hrs54min
• Calibration_Monitor medm screenshot is attached
• 0127- 0157utc Out of Observing for CALIBRATION
•  Broadband measurement started at 1427333255
  • Measurement at:  /ligo/groups/cal/H1/measurements/PCALY2DARM_BB/PCALY2DARM_BB_20250330T012727Z.xml
•  Simullines measurement
  • gps START time:  1427333622.245412
  • gps STOP time: 1427335020.945731
  •  File written out to: /ligo/groups/cal/H1/measurements/DARMOLG_SS/DARMOLG_SS_20250330T013325Z.hdf5
  • File written out to: /ligo/groups/cal/H1/measurements/PCALY2DARM_SS/PCALY2DARM_SS_20250330T013325Z.hdf5
  • File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L1_SS/SUSETMX_L1_SS_20250330T013325Z.hdf5
  • File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L2_SS/SUSETMX_L2_SS_20250330T013325Z.hdf5
  • File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L3_SS/SUSETMX_L3_SS_20250330T013325Z.hdf5
• Then ISC_LOCK was taken back to NLN for observing

TITLE: 03/29 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 152Mpc
OUTGOING OPERATOR: Ryan C
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 10mph Gusts, 7mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.19 μm/s
QUICK SUMMARY:

Ryan C handed over an Observing H1.  Have had (5) locklosses from Observing over last 24hrs with only 2 of those from last night being due to wind (winds are much lower this evening and secondary µseism continues to plummet).

Perhaps if L1/V1 go down any time after an hr from now (after 3hr thermalization), I could take the opportunity to run a calibration. 

TITLE: 03/29 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 156Mpc
INCOMING OPERATOR: Corey
SHIFT SUMMARY: I was able to get a coherence measurement during the first lock. We've relocked 3 times this shift, no issues relocking.
LOG:                                                                                    

I've been damping ITMY modes 5/6 with half the nominal gain (0.005) during the second/third lock as I wasn't totally convinced the damping was going well before with the higher gain. 3/4 monitors were going down but the DARM line height on DTT wasn't really changing. TJ said he had success with this lower gain the other day as well. I put the new damping settings for ETMY mode1 into lscparams.

• 14:17 UTC observing
  • 18:12 UTC lockloss
• 19:29 UTC observing
  • 20:22 UTC lockloss, DARM wiggle before the LL?
• 21:36 UTC observing

20:22 UTC lockloss

18:13 UTC lockloss right before the scheduled calibration suite, sad

Sat Mar 29 10:13:20 2025 INFO: Fill completed in 13min 16secs

TC-B was quite noisy during the fill today.

TITLE: 03/29 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 141Mpc
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 4mph Gusts, 1mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.26 μm/s
QUICK SUMMARY:

• 14:17 UTC observing
• The wind is much lower
• Secondary microseism is decreasing

TITLE: 03/28 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 149Mpc
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY:

Had a bit of moody winds tonight---no sustained winds, not really strong winds, but the middle of the shift had  waves of short gusty periods, two of which took H1 down.  Luckily the winds died down toward the end of the shift, to allow H1 to get back to Observing.  Took ETMy Mode1 to the settings Ryan C mentions in his summary.
LOG:

• 0130 Lockloss (due to EY winds)
  • Ran an Alignment and made it back to Observing for a whopping 4-min, until...
• 0252 Lockloss due to Cornder winds)
  • Ran an Alignment, but while getting ready for PRC, the FSS got fussy.  Toggling the FSS Autolocker was the solution.
  • Ran a 2nd Alignment.
  • 0443 Observing

For FAMIS #26369:  All looks well for the last week for all site HVAC fans (see attached trends).

BRSx is in the middle of both of its thresholds, and BRSy is slowly trending down to the lower threshold.

Not sure what did it to the PSL's FSS, but noticed we were stuck before the PRC portion of Initial Alignment, and DIAG MAIN had the following messages flashing like the devil:

• PSL_FSS:  PZT MON is high, may be oscillating
• PSL_FSS_TPD:  RefCav transmission is low

On the FSS screen, the autolocker was going wild and the PZT_MON screen was all over the place. 

Since the Autolocker was having issues, I toggled the autlocker off/on and this immediately calmed down the FSS and the IMC finally locked back up.

Going to restart the Initial Alignment.  Because the winds are still pretty attrocious. 

H1 was at NLN for 7min only to have another lockloss  at 252utc (1427251941)---as of 434utc this one is still Analyzing, but----Pretty certain this will be chalked up to wind again---this time the gusts were strongest at the Corner (hear alot of wind activity outside and can see lots of tumbleweeds rolling by on the cameras).

H1 had a lockloss from a 4hr53m lock at 1:30utc (1427247021, this has an EY WINDY tag).  Winds at EY were picking up around this time.

Gerardo, Dave:

At 16:51:34 Fri 28mar2025 PDT we had another small vacuum glitch in the LVEA, which this time was reported by VACSTAT, detected by those gauges with increased sensitivity (BSC2, CP2, YARM and XARM). Attached trends show this was a modest ~0.1e-09 Torr increase. Rising edge about 10 seconds, pumpdown time about 3 mins.

H1 was locked throughout. I reset vacstat_ioc.service to clear the alarm.

This week Mitch and I opened the can for the ISI destined for HAM1 and started adding damping parts. Spring, flexure and GS13 can dampers have all been added. TMDs have been mostly assembled, but have not been tuned yet, we will figure that out next week. I just finished setting up the CPS field interface chassis with the new triax sensors after setting the phases for the sensors. For the moment one of the cards is set as a timing master, I will have to change that when we go to connect to the system. Next week, TMD tuning, st0 L4C install, in-vac parts for the new CPS and pre-installing lifting pads and covers for install into the chamber. Then we can close up and wait for HAM1 chamber to be ready to receive.

First 2 pics are a couple shots of the ISI, third shows the TMDs we built this afternoon, which still need magnets and tuning. 

TITLE: 03/28 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 151Mpc
INCOMING OPERATOR: Corey
SHIFT SUMMARY: We lost lock from another earthquake, the wind started picking up during the afternoon but we relocked easily after an alignment. The violins have been damping nicely. The new settings I found for ETMY mode1 are FM1+FM5+FM10 G= -0.1, they damp mode1 well but don't really affect mode6.
LOG:

• 15:19 UTC Observing
  • I set ETMY mode1's gain to zero in lscparams (SUS)
• 17:42 UTC lockloss from a 6.6 from Cape Verde
  • We did some TOO tasks during this downtime such as
    • Realigning the refcav alog83616
      • IMC to down and misaligned MC3 SUS
    • Swapping a dying SUS power supply in the CER
      • I put all the SUS in HAMs 1 & 2 to safe for this
  • 19:25 UTC initial alignment
    • ALS_X (TRX_A_LF_OUT_DQ) would get fuzzy (~6x as thick of a line, 0.1 vs 0.6 min to max) then the WFS error signal would step out, DOF_2_P mainly, then it would come back in
• 20:40 UTC Observing