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Reports until 22:04, Sunday 29 September 2024
H1 General
oli.patane@LIGO.ORG - posted 22:04, Sunday 29 September 2024 (80363)
Ops Eve Shift End

TITLE: 09/30 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Reacquisition
INCOMING OPERATOR: Ryan C
SHIFT SUMMARY: Trying to relock and at LOCKING_ALS. Relocking from the previous lockloss wasn't too bad so hopefully this relocking goes smoothly as well. We had superevent candidate S240930aa during my shift!
LOG:

23:00UTC Observing and have been Locked for 2 hours

23:32 Lockloss
    00:09 Started an initial alignment after cycling through CHECK_MICH_FRINGES
    00:47 Initial alignment done, relocking
01:28 NOMINAL_LOW_NOISE
01:32 Observing

04:00 Superevent S240930aa

04:54 Lockloss

Start Time System Name Location Lazer_Haz Task Time End
21:43 PEM Robert Y-arm n Testing equipment 23:33
H1 General (Lockloss)
oli.patane@LIGO.ORG - posted 21:59, Sunday 29 September 2024 - last comment - 21:16, Monday 30 September 2024(80364)
Lockloss

Lockloss @ 09/30 04:54UTC

We went out of Observing at 04:53:56, and then lost lock four seconds later at 04:54:01.

Comments related to this report
ryan.short@LIGO.ORG - 09:56, Monday 30 September 2024 (80368)PSL, SQZ

It looks like the reason for dropping observing at 04:53:56 UTC (four seconds before lockloss) was due to the SQZ PMC PZT exceeding its voltage limit, so it unlocked and Guardian attempted to bring things back up. This has happened several times before, where Guardian is usually successful in bringing things back and H1 returns to observing within minutes, so I'm not convinced this is the cause of the lockloss.

However, when looking at Guardian logs around this time, I noticed one of the first things that could indicate a cause for a lockloss was from the IMC_LOCK Guardian, where at 04:54:00 UTC it reported "1st loop is saturated" and opened the ISS second loop. While this process was happening over the course of several milliseconds, the lockloss occurred. Indeed, it seems the drive to the ISS AOM and the secondloop output suddenly dropped right before the first loop opened, but I don't notice a significant change in the diffracted power at this time (see attached screenshot). Unsure as of yet why this would've happened to cause this lockloss.

Other than the ISS, I don't notice any other obvious cause for this lockloss.

Images attached to this comment
oli.patane@LIGO.ORG - 21:16, Monday 30 September 2024 (80384)

After comparing Ryan's channels to darm, still not sure whether this lockloss was caused by something in the PSL or not, see attached

Images attached to this comment
LHO General
ryan.short@LIGO.ORG - posted 16:37, Sunday 29 September 2024 (80357)
Ops Day Shift Summary

TITLE: 09/29 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Oli
SHIFT SUMMARY: H1 was locked this morning until winds picked up, which kept it down through midday. Was able to get relocked this afternoon, but we just had another lockloss as I'm drafting this log.

LOG:

Start Time System Name Location Lazer_Haz Task Time End
23:58 SAF H1 LVEA YES LVEA is laser HAZARD Ongoing
17:01 PEM Robert Y-arm n Testing equipment 18:34
21:43 PEM Robert Y-arm n Testing equipment Ongoing
H1 General (Lockloss)
oli.patane@LIGO.ORG - posted 16:36, Sunday 29 September 2024 - last comment - 18:30, Sunday 29 September 2024(80360)
Lockloss

Lockloss @ 09/29 23:32UTC. Ryan S and I had been watching the FSS channels glitching but Ryan closed them literally seconds before the lockloss happened so not sure yet if it was the FSS but we think it might've been. Wind is also above 30mph and increasing so could've been that too

Comments related to this report
oli.patane@LIGO.ORG - 18:05, Sunday 29 September 2024 (80361)

Even though the wind was (just a bit) over threshold, it definitely looks like the FSS (green, lower right) was the cause of the lockloss

Images attached to this comment
oli.patane@LIGO.ORG - 18:30, Sunday 29 September 2024 (80362)

09/30 01:30UTC Observing

H1 General
oli.patane@LIGO.ORG - posted 16:05, Sunday 29 September 2024 (80359)
Ops Eve Shift Start

TITLE: 09/29 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 148Mpc
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 27mph Gusts, 16mph 3min avg
    Primary useism: 0.10 μm/s
    Secondary useism: 0.15 μm/s
QUICK SUMMARY:

Observing at 150Mpc and have been Locked for 2 hours. Winds are still above 25mph but microseism is getting lower.

H1 General
ryan.short@LIGO.ORG - posted 12:13, Sunday 29 September 2024 (80355)
Ops Day Mid Shift Report

Since the lockloss at earlier this morning, high winds up to 40mph have made locking H1 problematic; on occasion we can lock DRMI, but rarely. Unfortunately, the forecast says these winds will stick around for most of today.

H1 General (Lockloss)
ryan.short@LIGO.ORG - posted 10:16, Sunday 29 September 2024 - last comment - 14:11, Sunday 29 September 2024(80354)
Lockloss @ 16:51 UTC

Lockloss @ 16:51 UTC - link to lockloss tool

Cause looks to me to be from high winds; gusts just hit up to 40mph and suspensions were moving right before the lockloss in a familiar way.

Images attached to this report
Comments related to this report
ryan.short@LIGO.ORG - 14:11, Sunday 29 September 2024 (80356)

H1 back to observing at 21:09 UTC. After a few hours, thanks to a lull in the wind, H1 was able to get relocked. Fully automatic acquisition.

LHO VE
david.barker@LIGO.ORG - posted 08:30, Sunday 29 September 2024 (80353)
Sun CP1 Fill

Sun Sep 29 08:11:15 2024 INFO: Fill completed in 11min 11secs

 

Images attached to this report
LHO General
ryan.short@LIGO.ORG - posted 07:45, Sunday 29 September 2024 (80352)
Ops Day Shift Start

TITLE: 09/29 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Ryan C
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 17mph Gusts, 10mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.16 μm/s
QUICK SUMMARY: H1 appears to have unlocked around an hour ago and is currently relocking up to INJECT_SQUEEZING. Four locklosses in total overnight; I'll start looking into them shortly.

H1 General
oli.patane@LIGO.ORG - posted 22:00, Saturday 28 September 2024 (80351)
Ops Eve Shift End

TITLE: 09/29 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 153Mpc
INCOMING OPERATOR: Ryan C
SHIFT SUMMARY: Observing at 155Mpc and have been Locked for 9 hours. We've been Locked my entire shift so it's been a quiet evening. Didn't get a chance to take today's calibration measurements because Virgo and Livingston stayed nice and locked.
LOG:

23:00 Observing and have been Locked for 3 hours

H1 SEI
oli.patane@LIGO.ORG - posted 20:38, Saturday 28 September 2024 (80350)
BRS Drift Trends - Monthly FAMIS

Closes FAMIS#26447, last checked 79824

Driftmon plots, auxiliary plots

Everything is looking good. BRSX is close-ish to the lower threshold after the latest picomotor move (80269) but looks to be staying level.

First spike on BRSX plot is pico work from September 19th (80183)
Second spike on BRSX plot is pico work from September 24th (80269)

Images attached to this report
H1 General
oli.patane@LIGO.ORG - posted 19:55, Saturday 28 September 2024 (80349)
Ops Eve Midshift Status

Observing at 150Mpc and have been Locked for 7 hours now. It's been a quiet evening.

LHO FMCS (PEM)
oli.patane@LIGO.ORG - posted 19:54, Saturday 28 September 2024 (80348)
HVAC Fan Vibrometers Check FAMIS

Closes FAMIS#26331, last checked 80086

Note: I'm trending them back two weeks since last week the check wasn't able to be done.

Corner Station Fans (attachment1)
- All fans are looking normal and within range.

Outbuilding Fans (attachment2)
- All fans are looking normal and within range.

Images attached to this report
LHO General
ryan.short@LIGO.ORG - posted 16:10, Saturday 28 September 2024 (80344)
Ops Day Shift Summary

TITLE: 09/28 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 150Mpc
INCOMING OPERATOR: Oli
SHIFT SUMMARY: Mostly quiet shift with just one lockloss and an easy reacquisition. Because of the lockloss, however, we did not get the usual calibration sweeps done today.

H1 has now been locked and observing for 3 hours.

H1 General
oli.patane@LIGO.ORG - posted 16:06, Saturday 28 September 2024 (80347)
Ops Eve Shift Start

TITLE: 09/28 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 149Mpc
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 7mph Gusts, 4mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.24 μm/s
QUICK SUMMARY:

Currently Observing at 155Mpc and have been Locked for 3 hours. Microseism is trending back down and winds are low.

H1 General (Lockloss)
ryan.short@LIGO.ORG - posted 12:15, Saturday 28 September 2024 - last comment - 13:04, Saturday 28 September 2024(80345)
Lockloss @ 18:58 UTC

Lockloss @ 18:58 UTC - link to lockloss tool

No obvious cause, but the lockloss tool gave this the FSS_OSCILLATION tag. This happened two minutes before I was planning on running the scheduled calibration sweeps.

Images attached to this report
Comments related to this report
ryan.short@LIGO.ORG - 13:04, Saturday 28 September 2024 (80346)

H1 back to observing at 20:04 UTC. Fully automated relock without an initial alignment.

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