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Reports until 22:01, Sunday 22 June 2025
LHO General
ryan.short@LIGO.ORG - posted 22:01, Sunday 22 June 2025 (85234)
Ops Eve Shift Summary

TITLE: 06/23 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 147Mpc
INCOMING OPERATOR: Ryan C
SHIFT SUMMARY: One lockloss this shift which took a while to come back from, but overall a fairly quiet evening. H1 has been locked for 1.5 hours.

H1 General (Lockloss)
ryan.short@LIGO.ORG - posted 18:42, Sunday 22 June 2025 - last comment - 20:52, Sunday 22 June 2025(85232)
Lockloss @ 00:59 UTC

Lockloss @ 00:59 UTC after almost 23 hours locked - link to lockloss tool

No obvious cause.

Comments related to this report
ryan.short@LIGO.ORG - 20:52, Sunday 22 June 2025 (85233)SQZ

Back to observing at 03:45 UTC.

As has been the norm recently, D/PRMI took a very long time to catch despite good alignment and buildups. There were also a few low-state locklosses due to the ALS-X PLL beatnote having an error, which would then take a few minutes to fix itself, so with everything together this was a lengthy relock (but I did not need to run an alignment; just some slight adjustments of PRM and BS).

After reaching low noise, SQZ couldn't lock because the SHG PZT voltage was low at around 3.4V and Guardian would not proceed. Relocking the SHG did not seem to move the PZT to a better place, so I simply lowered the minimum SHG PZT voltage threshold in SQZ_MANAGER from 5 to 3 and loaded the Guardian. After that, the SQZ_SHG Guardian is still giving a warning about the PZT voltage being low, but SQZ_MANAGER was able to make it to 'FRED_DEP_SQZ' and otherwise things looked okay, so I took H1 into observing. This may need to be reverted or addressed properly tomorrow. [Tagging SQZ]

LHO General
ryan.short@LIGO.ORG - posted 14:41, Sunday 22 June 2025 (85231)
Ops Eve Shift Start

TITLE: 06/22 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 147Mpc
OUTGOING OPERATOR: Corey
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 15mph Gusts, 5mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.09 μm/s
QUICK SUMMARY: H1 has been locked for 19.5 hours and all's quiet.

LHO General
corey.gray@LIGO.ORG - posted 14:39, Sunday 22 June 2025 (85229)
Sun DAY Ops Summary

TITLE: 06/22 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 147Mpc
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY:

A nice very quiet shift!  H1 has been humming along (currently at 19.5hr lock), and no intervention was needed during the shift.  Breezes have increased slightly through the day.
LOG:  n/a

LHO VE
david.barker@LIGO.ORG - posted 10:13, Sunday 22 June 2025 (85230)
Sun CP1 Fill

Sun Jun 22 10:09:56 2025 INFO: Fill completed in 9min 52secs

 

Images attached to this report
LHO General
corey.gray@LIGO.ORG - posted 07:26, Sunday 22 June 2025 (85228)
Sun DAY Ops Transition

TITLE: 06/22 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 150Mpc
OUTGOING OPERATOR: Ryan C
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 4mph Gusts, 2mph 3min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.11 μm/s
QUICK SUMMARY:

H1's been locked for almost 12.5hrs  and it looks like we had a brief outage from Observing due to the SQZ dropping us out just before 1300utc/6amPDT, but SQZ MANAGER and H1 got back to OBSERVING automatically within a 5min (coincidentally, this improved the H1 Range [which had been drifting down below 150Mpc] getting it back to above 150Mpc.

Environmentally, we are doing well; useism had been above the 50th percentile and has been drifting down from this for the last 10hrs.  Winds are low and it is a cloudy and cool morning.

LHO General
ryan.short@LIGO.ORG - posted 22:01, Saturday 21 June 2025 (85227)
Ops Eve Shift Summary

TITLE: 06/22 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 144Mpc
INCOMING OPERATOR: Ryan C
SHIFT SUMMARY: One lockloss this evening after a very short observing segment followed by an automatic relock; quiet shift otherwise. H1 has been locked and observing for almost 3 hours.

H1 General (Lockloss)
ryan.short@LIGO.ORG - posted 17:41, Saturday 21 June 2025 - last comment - 19:12, Saturday 21 June 2025(85225)
Lockloss @ 00:23 UTC

Lockloss @ 00:23 UTC after just 4 minutes of observing - link to lockloss tool

No obvious cause, but maybe a very small ETM glitch? The lockloss tool tags wind, which was getting up to about 30mph at the time.

Comments related to this report
ryan.short@LIGO.ORG - 19:12, Saturday 21 June 2025 (85226)

Back to observing at 02:10 UTC. Fully automatic relock, but there was a lockloss at DRMI and it was taking a long time to catch after.

LHO General
corey.gray@LIGO.ORG - posted 16:41, Saturday 21 June 2025 (85215)
Sat DAY Ops Summary

TITLE: 06/21 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY:

LOG:

LHO General
ryan.short@LIGO.ORG - posted 16:10, Saturday 21 June 2025 (85223)
Ops Day Shift Start

TITLE: 06/21 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Earthquake
OUTGOING OPERATOR: Corey
CURRENT ENVIRONMENT:
    SEI_ENV state: EARTHQUAKE
    Wind: 18mph Gusts, 7mph 3min avg
    Primary useism: 0.18 μm/s
    Secondary useism: 0.17 μm/s
QUICK SUMMARY: H1 is recovering from a recent earthquake and has just started an initial alignment.

H1 General
corey.gray@LIGO.ORG - posted 15:11, Saturday 21 June 2025 - last comment - 17:20, Saturday 21 June 2025(85222)
EQ Lockloss (M6.1 @Japan)

Almost thought there was a chance we were going to ride through this earthquake (L1 went down 14 min before us), but alas the ground motion was too much for H1 and caused a lockloss.  This ended a nearly 6.5hr lock for today's shift.  Observatory Mode is in the EARTHQUAKE state until we get back to NLN.  Will Stay in Prep For Locking for atleast 30more min.

Comments related to this report
ryan.short@LIGO.ORG - 17:20, Saturday 21 June 2025 (85224)

Back to observing at 00:19 UTC. Fully automated relock after a fully automated initial alignment.

H1 SQZ (SQZ)
corey.gray@LIGO.ORG - posted 12:35, Saturday 21 June 2025 - last comment - 12:59, Saturday 21 June 2025(85220)
SQZ Looked Bad: Ran SCAN_SQZANG_FDS + Adjusted OPO Temperature

After returing to Observing for about 18min post-Saturday-Calibration, noticed that the DARM FOM trace was above reference at high frequency (+ "H1 Live" trace on nuc33 was also above the reference).  Consulted the Troubleshooting SQZ wiki, dropped out of Observing, and did the following:

  1. Ran SCAN_SQZANG_FDS:  This made DARM FOM look better (back at reference for high frequency, but it was still higher for the "H1 Live" trace on nuc33).
  2. Adjusted OPO Temperature:  Able to increase H1:SQZ-CLF_REFL_RF6_ABS_OUTPUT a bit (see attached), but still higher for the "H1 Live" trace on nuc33.  Then returned to Observing.

These adjustments had H1 out of Observing from 1917-1922utc.  It has now been 10min, and it is looking like I have made the range worse (looking like range is ~15Mpc worse).  Will give it more time and see how it goes while I grab lunch.

Images attached to this report
Comments related to this report
corey.gray@LIGO.ORG - 12:59, Saturday 21 June 2025 (85221)SQZ

Vicky got back to me on Mattermost.  She suggested running another SCAN SQZANG (because of the OPO adjustment).  Went out of observing again to do that, and that restored our range.  DARM FOM is still better, but H1-Live on nuc33 is still high...it might be a little lower since my first SQZ adjustments.  At any rate, back to Observing.

H1 CAL (CAL)
corey.gray@LIGO.ORG - posted 12:11, Saturday 21 June 2025 - last comment - 08:40, Monday 23 June 2025(85217)
Saturday H1 Calibration Measurement (broadband headless + simulines)

Measurement NOTES:

Attached is a screenshot of the Calibration Monitor + pdf of Pydarm Report

Images attached to this report
Non-image files attached to this report
Comments related to this report
elenna.capote@LIGO.ORG - 08:40, Monday 23 June 2025 (85236)

I've been adding the broadband measurements to this template which exists in [userapps]/cal/h1/dtt_templates

Images attached to this comment
LHO VE
david.barker@LIGO.ORG - posted 10:20, Saturday 21 June 2025 (85219)
Sat CP1 Fill

Sat Jun 21 10:10:09 2025 INFO: Fill completed in 10min 5secs

 

Images attached to this report
H1 ISC
corey.gray@LIGO.ORG - posted 08:50, Saturday 21 June 2025 (85218)
H1 Back to Observing, Nodes Loaded, CS_ISC sdf Diffs ACCEPTED, Should Be Thermalized for 1830 Calib

H1 is back to Observing.  As noted earlier, took the opportunity to take care of some housekeeping tasks:

Next uip:  Take the Saturday Morning Calibration in about 2.5hrs *knock on wood*

Images attached to this report
H1 ISC
corey.gray@LIGO.ORG - posted 07:44, Saturday 21 June 2025 (85216)
INITIAL ALIGNMENT Run With Reloaded INIT_ALIGN To Include PRC ALIGN OFFLOADED

Per Elenna's alog85200 yesterday + RyanS's subentry (with updated INIT ALIGN), Ran a 2nd INITIAL ALIGNMENT this morning for two reasons (to (1) enact Ryan's changes with a RELOAD of INIT ALIGN, and (2) to let the BS chill for about 65min).

Looks like the PRC ALIGN OFFLOADED worked fine as Elenna notes (see attached IR signals during alignment.

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