Last week Corey changed the gains of POP18 because of difficulties locking DRMI.  83540  To avoid having the histories of these POP18 build ups being confusing, I've moved the gain of 2 into the trigger matrix, and in sdf set the locking gains back to 2.  (These gains were changed from 1 to 2 when the 50/50 splitter was added to the POP path.) 

I've edited line 238 in ISC_DRMI to set the trigger matrix element to 2.

Lockloss after 2 minute lock before reaching observing. No immediate apparent causes.

TITLE: 03/31 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 28mph Gusts, 23mph 3min avg
    Primary useism: 0.06 μm/s
    Secondary useism: 0.21 μm/s
QUICK SUMMARY:

IFO is LOCKING in LASER_NOISE_SUPPRESSION

Today we have planned comissioning from 8:30 to 11:30 local time.

The last lockloss seems to have been caused by wind and elevated microseism, though neither seem high enough to have necessarily caused a lockloss.

TITLE: 03/30 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 154Mpc
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY:

Nice shift with H1 running decently even as the weather turned a bit in the evening (w/ 30+mph winds and rain as the sun set....but then calmed down toward the end of the shift).  At shift's end, H1's current lock is over 7hrs (with one GW-candidate).
LOG:

• 0135 Superevent S250331o

We had a BSC3 sensor glitch at 16:39:16 resulting in a single VACSTAT alarm. I restarted the service at 16:50 to clear this alarm.

I also set the FMCS Reverse Osmosis alarm into silent mode so it will only email and not text for the next 24 hours.

Bypass will expire:
Mon Mar 31 04:57:28 PM PDT 2025
For channel(s):
    H0:FMC-CS_WS_RO_ALARM
 

TITLE: 03/30 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 153Mpc
INCOMING OPERATOR: Corey
SHIFT SUMMARY: We've been locked for 1.5 hours. The ground has been doing the tectonic shuffle this morning with a group of earthquakes and aftershocks from Tonga, 7.0, 4.8, 6.1, 4.9, 5.8...
LOG: No log.

The porta potty outside the FCES has also been knocked over, and OSB receiving is blocked by tumbleweeds. (Tagging FMCS)

• 12:31:01 Earthquake mode activated
• 12:31:23 UTC 7.0 from Tonga arrived, lockloss
  • 15:50 UTC 6.1 from Tonga arrived
  • 16:55 UTC Initial alignment
  • 18:16 UTC Observing
• 20:34 UTC lockloss from an ETMX glitch
  • 22:55 UTC Observing, the SQZer seemed to lock at a slightly worse spot than the previous locks
  • 22:30 another EQ from Tonga (5.2) came through but we survived

TITLE: 03/30 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: 16mph Gusts, 11mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.15 μm/s
QUICK SUMMARY:

H1 has been at NLN for 1.5+hrs. 

There is a CDS Alarm for the RO (reverse osmosis) system.  Happened to phone Tyler earlier today with water questions and he mentioned he turned off both RO skids this morning (@943amPDT).

Environmental noise wise, secondary µseism is lower than 24hrs (looks like it's flattened out squarely at the 50th percentile  about 7hrs ago).  Winds are a little are a touch more breezy than yesterday, but still well under 20mph.

20:34 UTC lockloss, it appears to have been from an ETMX glitch

Sun Mar 30 10:11:04 2025 INFO: Fill completed in 11min 1secs

TC-B slightly noisy.

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