Alerted by H1_MANAGER that it needed intervention. There was a large earthquake coming through that had tripped the ISIs for the ITMs and ETMs. Also, ETMY stages M0 and R0 had tripped (not yet sure if that is just due to the ISI tripping).

There was also a notification on verbals from 08:51UTC, a minute after everything tripped, that says "ETMY hardware watchdog trip imminent", but when I checked the hardware watchdog screen everything looked normal with no countdowns. Once it looked like the worst of the earthquake had passed and the ISI values were all within range, I reset R0 and M0 for ETMY and reset all four ISI watchdogs. We are still in LARGE_EQ mode so we haven't started relocking yet, but it looks like we are close to leaving and we should be good to go for relocking.

TITLE: 01/12 Eve Shift: 0030-0600 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 159Mpc
INCOMING OPERATOR: Oli
SHIFT SUMMARY:

IFO is in NLN and OBSERVING as of 02:36 UTC

Overall pretty quiet shift with one random lockloss (alog 82227). There doesn't seem to have been an EX glitch and the environment was stable (same microseism as last few days and low wind). We managed to get back up to NLN in 1 hour, with DRMI Locking and ENGAGE_ASC_FOR_FULL_IFO taking the longest to get past.

About 1.5hrs into the lock, SQZ unlocked and took us out of OBSERVING. It relocked automatically and we were observing again 4 minutes later.

LOG:

None

Unknown cause Lockloss - not environment and no EX saturation.

TITLE: 01/11 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 163Mpc
INCOMING OPERATOR: Ibrahim
SHIFT SUMMARY: I ran the calibration sweep this afternoon, lockloss shortly after. I tried restarting the IOC for the lab dust monitors but it still couldn't connect to the lab2. "ISS diff power low" - DIAG_MAIN We've been locked for ~2 hours.
LOG: No log.

• 20:03 lockloss
  • ALSY couldn't lock  there was a "Find YARM by hand" notification, so I had to step in and I adjusted ITMY in yaw and it fixed it.
  • 20:42 I started an initial alignment
  • 22:35 UTC Observing, range was in the 140s (probably the OPO temp)
  • 23:00:04 - 23:01:36 I adjusted the OPO temp

TITLE: 01/11 Eve Shift: 0030-0600 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 156Mpc
OUTGOING OPERATOR: Ryan C
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 10mph Gusts, 6mph 3min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.38 μm/s
QUICK SUMMARY:

IFO is in NLN and OBSERVING as of 22:34 UTC

Closes FAMIS 26353. Last checked in alog 82116.

All trends look well. No fans above or near the (general) 0.7 ct threshold. Screenshots attached.

We had just finished the calibration measurement 3 minutes earlier, 20:03 lockloss

Simulines start: The wind started picking up during the measurement.

PST: 2025-01-11 11:36:44.979063 PST
UTC: 2025-01-11 19:36:44.979063 UTC
GPS: 1420659422.979063

Simulines stop:

PST: 2025-01-11 12:00:27.281127 PST
UTC: 2025-01-11 20:00:27.281127 UTC
GPS: 1420660845.281127

Files:

2025-01-11 20:00:27,195 | INFO | File written out to: /ligo/groups/cal/H1/measurements/DARMOLG_SS/DARMOLG_SS_20250111T193645Z.hdf5
2025-01-11 20:00:27,203 | INFO | File written out to: /ligo/groups/cal/H1/measurements/PCALY2DARM_SS/PCALY2DARM_SS_20250111T193645Z.hdf5
2025-01-11 20:00:27,208 | INFO | File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L1_SS/SUSETMX_L1_SS_20250111T193645Z.hdf5
2025-01-11 20:00:27,213 | INFO | File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L2_SS/SUSETMX_L2_SS_20250111T193645Z.hdf5
2025-01-11 20:00:27,218 | INFO | File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L3_SS/SUSETMX_L3_SS_20250111T193645Z.hdf5

Closes FAMIS26346

Laser Status:
    NPRO output power is 1.851W
    AMP1 output power is 70.19W
    AMP2 output power is 137.0W
    NPRO watchdog is GREEN
    AMP1 watchdog is GREEN
    AMP2 watchdog is GREEN
    PDWD watchdog is GREEN

PMC:
    It has been locked 25 days, 0 hr 12 minutes
    Reflected power = 25.46W
    Transmitted power = 104.6W
    PowerSum = 130.0W

FSS:
    It has been locked for 0 days 15 hr and 6 min
    TPD[V] = 0.8127V

ISS:
    The diffracted power is around 2.5%
    Last saturation event was 0 days 15 hours and 7 minutes ago

Possible Issues:
    PMC reflected power is high

Sat Jan 11 10:18:17 2025 INFO: Fill completed in 18min 14secs

TCmins [-110C, -107C] OAT (10C, 50F)

TITLE: 01/11 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 155Mpc
OUTGOING OPERATOR: Oli
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 5mph Gusts, 2mph 3min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.48 μm/s
QUICK SUMMARY:

• We've been locked for 11 hours, in observing since 14:49 UTC
  • PI 24 has rung up and been damped 2 this lock
• 2ndary microseism is decreasing, wind is low

TITLE: 01/11 Eve Shift: 0030-0600 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 158Mpc
INCOMING OPERATOR: Oli
SHIFT SUMMARY:

IFO is in NLN and OBSERVING as of 05:05 UTC

Overall calm shift with one slightly annoying LL during an opo temp optimization. The reacquisition was slow due to the environment (high winds and an earthquake) but was ultimately fully automatic after an initial alignment. Lockloss alog 82215

Other than this, the SQZ opo temp had to be adjusted so I went out of OBSERVING for 6 mins (5:05 UTC to 5:11 UTC) and adjusted it successfully bringing range from ~138 to ~158MPc (screenshot attached).

Otherwise, the microseism seems to be coming down slowly and high winds have calmed down.

LOG:

None

Unknown cause lockloss but reasonable to assume it was either microseism or squeeze related (though I'm unsure if SQZ can cause a LL like that).

The lockloss happened as I was adjusting the SQZ OPO temperature since in the last hour, there has been a steady decline in H1:SQZ-CLF_REFL_RF6_ABS_OUTPUT channel. After noticing this, I went out of OBSERVING and into CORRECTIVE MAINTENANCE to fix. It was actually working (the channel signal was getting higher with each tap when the LL happened. This coincided with a 5.2 EQ in Ethiopia, which I do not think was the cause but may have moved things while in this high microseim state. I've attached the trends from SQZ overview and OPO temp including the improvements made. If it is possible to induce a LL changing the OPO temp, then this is likely what happened, though the LL did not happen when the temp was being adjusted, as the 3rd screenshot shows.

TITLE: 01/11 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 156Mpc
INCOMING OPERATOR: Ibrahim
SHIFT SUMMARY:
IFO Has been locked for 9 hours.
It's been a perfect day for Observing.
Nothing to really report.


LOG:                                                                                                                                                                                                                                                                                            

TITLE: 01/11 Eve Shift: 0030-0600 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 152Mpc
OUTGOING OPERATOR: Tony
CURRENT ENVIRONMENT:
    SEI_ENV state: USEISM
    Wind: 6mph Gusts, 2mph 3min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.48 μm/s
QUICK SUMMARY:

IFO is in NLN and OBSERVING as of 15:24 UTC

Jennie W, Sheila,

On Wednesday Sheila and I compared the measurement of HAM 6 throughput taken in April 2024 where we stepped the DARM offset and then compared the power at the ASC port which is sensitive to DARM with the power on the DCPDs, with the HAM 6 efficiency for this light predicted by the known losses as obtained from the squeezer noise budget.

We found that combining both of these results in a prediction of unknown losses of 12.2% which sort of matches the 10.4% unknown losses predicted from squeezing measurements (alog # 82097).

HAM6 throughput measured in April 2024 from alog #79146.: 80.2%

HAM6 known losses: google sheet (1-0.00072)*(1-0.015)*(1-0.0096)*(1-0.044)*(1-0.02) = 91.3% expected HAM6 throughput

Unknown HAM6 losses based on this measurement = 1-0.802/0.913 = 12.2%

Yesterday I looked at Camilla and Elenna's DARM step measurement from 21st October 2024, and found the unknown loss is 10.2 % using the HAM6 throughput measured in October which matches the 10.4% unknown losses predicted from squeezing measurements (alog # 82097).

HAM6 throughput measured in October 2024 from alog #82204: 82 %

Unknown HAM6 losses based on this measurement: 1-0.82/0.913 = 10.2%

Fri Jan 10 10:10:06 2025 INFO: Fill completed in 10min 3secs

Jordan confirmed a good fill curbside. TCmins [-92C, -90C] OAT (1C, 34F)

TITLE: 01/10 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 140Mpc
OUTGOING OPERATOR: Oli
CURRENT ENVIRONMENT:
    SEI_ENV state: USEISM
    Wind: 9mph Gusts, 6mph 3min avg
    Primary useism: 0.05 μm/s
    Secondary useism: 0.62 μm/s
QUICK SUMMARY:
H1just recently locked  and Observing 7 minues before I walked in.
Everything looks like it is working well at first glance, except H1:PEM-CS_DUST_LAB2  still doesn't work.