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Reports until 17:57, Friday 21 August 2026
H1 General
ryan.crouch@LIGO.ORG - posted 17:57, Friday 21 August 2026 (91646)
OPS Friday EVE shift summary

TITLE: 08/22 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: Keita investigated the beams out on ISCT1, he relocked green after he was finished, they still look good (~1.15 for ALS-Y, and ~0.75 for ALS-X). I'm leaving them unlocked.
LOG:

Start Time System Name Location Lazer_Haz Task Time End
22:19 PEM Robert EX N Troubleshooting ground injection 00:10
22:21 ISC Keita LVEA Y Checking beams on ISCT1 00:49
23:24 PEM Reinhardt LVEA Y Checking on DAS fiber 23:51
H1 General
ryan.crouch@LIGO.ORG - posted 16:30, Thursday 20 August 2026 (91623)
OPS Thursday Day shift summary

TITLE: 08/20 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: Ibrahim
SHIFT SUMMARY: Multiple optics lab dust alarms throughout the day, corner alignment, we did not get to PRMI or DRMI as there was a ALS slow controls issue unlocking XARM. The main Beckhoff computer seems to be having connections issues, a restart is required to fix this, and it will be done tomorrow.
LOG:                                                              

Start Time System Name Location Lazer_Haz Task Time End
15:02 FAC Kim LVEA Y Tech clean 16:06
15:36 TCS Camilla CR N ITMY CO2 blasting 16:36
16:20 VAC Travis LVEA Y Check HAM7 pumpdown 16:29
16:24 PEM Reinhardt LVEA Y PEM checks 18:09
16:41 FAC Kim MidY N Tech clean 17:42
16:44 ISC Betsy Mech room Y Equipment Checks 17:12
16:50 SEI Jim, Mitch Mids N Equipment checks 17:43
16:58 VAC Travis LVEA y Turning off turbo pumps 17:31
17:23 ISC Camilla, Elenna LVEA Y ISCT1 table DIFF beatnote adjustment 17:42
17:42 FAC Kim H2 building N Tech clean 17:53
19:54 ALS Keita EndY N Troubleshoot ALS WFS issue 21:16
19:56 ALS Keita CER Y Grab cds laptop 19:56
20:08 EE Marc, Fil EndY N ALS wfs troubleshooting 21:15
20:58 PEM Reinhardt LVEA Y PEM work cont. (fibers) 21:40
21:17 VAC Travis LVEA Y Finish turning off turbo pumps 21:23
21:33 TCS Camilla Prep lab N CHETA checks 21:50
21:43 SAF Richard Mech room N Reboot access system network switch 21:53
21:48 PEM Robert, Reinhardt Output arm N Shaker injections to tests new fibers 21:59
21:53 PSL Jason MidY then X N Look for old PSL chiller 22:28
H1 General
ryan.crouch@LIGO.ORG - posted 07:37, Thursday 20 August 2026 (91614)
OPS Thursday Day shift summary

TITLE: 08/20 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 4mph Gusts, 2mph 3min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.08 μm/s 
QUICK SUMMARY:

H1 General
ryan.crouch@LIGO.ORG - posted 18:49, Monday 17 August 2026 (91568)
OPS Monday EVE shift summary

TITLE: 08/18 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: The optics lab has been a little dusty today, three events over 10k 0.3um particles and its got up to 40k as of 18:30. PSL laser room is also seeing some counts, 300-400 in the 0.3um range. The MSR has also heated up a few degrees, but it seems to have plateaued. Corner alignment continued and there is still more to be done. There are a few overnight tests planned... A SEI injection on HAM3 in RY and X (Huyen) is on going as of end of shift, some JAC heater tests (Jennie) will be later tonight?, an IFO power increase with JAC (Masayuki) is on going as of end of shift, and a ring heater test with SR3 (Camilla) ~8/830PM PST / 20:00UTC.
LOG:                

Start Time System Name Location Lazer_Haz Task Time End
23:39 SEI Jim FCES N Restore config/settings 23:50
Images attached to this report
H1 General
ryan.crouch@LIGO.ORG - posted 16:30, Friday 14 August 2026 (91541)
OPS Friday Day shift summary

TITLE: 08/14 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: Ibrahim
SHIFT SUMMARY: Masayuki and Sheila worked on commissioning JAC and some ASC loops and corner alignment, there were two DAQ restarts and some model work, and HAM7 pumpdown started (2.25e-5 Torr as of 23:30).
LOG:                                                                                                                                                                                                                                                                                                                                                          

Start Time System Name Location Lazer_Haz Task Time End
14:00 FAC Randy, Chris LVEA, yarm term slab N Craning scissor lift to prep for scaffold removal 15:29
14:30 FAC Kim LVEA N Tech clean 14:48
15:49 FAC Chris, Randy LVEA N Move scissor lifts off of term slab 16:47
15:56 SEI Jim LVEA N Turn off (damped) ISI to add cable 16:06
16:22 VAC Gerardo LVEA N Check on HAM7 17:07
16:28 SEI Huyen, Shoshana, Jim CER N CRS checks, rewire pigtails 17:02
16:32 VAC Travis LVEA N Join Gerardo at HAM7 17:07
17:31 SEI Jim, Shoshana CER N CRS wire grounding 17:39
20:09 VAC Gerardo LVEA N Climb on HAM1 to adjust valve, then HAM7 turbo pump 22:20
20:14 SEI Shoshana, Huyen LVEA N CRS rack, CRS damping 21:00
20:15 FAC Chris Out buildings N Safety checks 21:35
20:51 VAC Travis LVEA N Join Gerardo at HAM7 22:20
21:14 SEI Jim, Huyen FCES N Electronics testing 21:42
21:14 CDS Dave, Matilda Ends N CDS work 22:41
21:55 SEI Jim FCES N Electronics testing 23:01
H1 General
ryan.crouch@LIGO.ORG - posted 07:34, Friday 14 August 2026 - last comment - 09:06, Friday 14 August 2026(91535)
OPS Friday Day shift start

TITLE: 08/14 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 8mph Gusts, 6mph 3min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.12 μm/s 
QUICK SUMMARY:

Comments related to this report
ryan.crouch@LIGO.ORG - 09:06, Friday 14 August 2026 (91539)SUS
Link

I took undamped TFs of PR2 this morning, the P and Y magnitudes seem a little higher than expected. I'm going to measure the OLG for P and Y next.

Non-image files attached to this comment
H1 General
ryan.crouch@LIGO.ORG - posted 16:32, Tuesday 11 August 2026 (91479)
OPS Tuesday day shift summary

TITLE: 08/11 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY: GV8 was opened and closed today for Xarm alignment commissioning, ZM4 PSAMs adjustment was finished up. We had a small power glitch in the afternoon that tripped off the end station HEPIs.
LOG:                            

Start Time System Name Location Lazer_Haz Task Time End
14:33 FAC Kim LVEA Y' Tech clean 15:11
14:59 FAC Chris LVEA Y FAMIS checks 15:26
15:26 FAC Chris All Out BLDs N FAMIS checks around site 17:44
16:09 SEI Carlos LVEA Y Seismometer checks 16:55
16:16 SEI Jim LVEA Y SPI checks 16:28
16:37 OPS RyanC LVEA Y -> N LASER hazard transition, hazard to safe 16:47
16:48 EE Fil LVEA N Check JAC shutter connections 16:52
16:48 EPO Jenne LVEA N Tour 17:30
16:52 EPO Camilla LVEA N Tour 17:25
16:54 SQZ Rahul, RyanS LVEA Y/N HAM7 work, bifurcated laser hazard area 18:15
17:21 EPO Corey LVEA N Tour, in @ 12:00 17:34
17:46 OPS RyanC LVEA N -> Y Laser hazard transition, safe bifurcated to hazard 17:58
17:48 VAC Gerardo, Travis LVEA YES Opening GV8 (XARM) 18:13
18:07 PEM Michael, Shoshana, Huyen LVEA Y NRS hardware under ITMY, Huyen out 18:21 19:45
18:22 ALS Jennie, Masayuki LVEA Y ISCT1 table checks 18:45
18:29 SEI Jim CER Y Quick check SPI, CER maybe LVEA 18:32
19:12 ALS Sheila, Masayuki LVEA Y ISCT1 alignment checks 19:26
19:15 ISC Betsy LVEA Y Checks 19:22
19:29 CDS Dave CER Y Accelerometer checks 00:28
19:43 CDS/SAF Patrick MSR N Beckhoff safety computer investigation 20:03
20:01 FAC Randy LVEA Y Clean room checks 20:58
20:02 EE Fil, Jackie EndX N Reset VFD and remove analog cameras 21:07
20:02 SEI Jim EndX N Reset VFD recover HEPI 20:33
20:03 SQZ RyanS LVEA Y Beam profiles at HAM7 21:50
20:23 SQZ Rahul LVEA Y HAM7 work, ZM4 21:23
20:59 FAC Randy EndY then X N Clean room checks 21:59
21:08 EE Fil, Jackie EndY N Remove analog cameras 21:39
21:25 ALS Sheila, Camilla LVEA Y ISCT1 beatnote adjustment 22:01
21:21 SEI Jim, Huyen FCES N CPS checks/tests 21:45
21:37 SAF Richard Mechanical N HEPI pump checks 21:50
21:39 EE Fil, Jackie CER Y Remove analog camera electronics 23:21
22:11 PEM Shoshana, Huyen LVEA Y CRS laser 22:24
22:19 ISC Sheila, Masayuki LVEA Y ISCT1 alignment checks 23:00
22:58 SEI Michael, Jim LVEA Y Wiggle SPI cable, look at other cabling at TCS rack 23:58
23:10 VAC Gerardo LVEA Y Close GV8 00:28
23:22 EE Fil, Jackie MSR N Remove analog camera electronics 00:22

The gate phone microphone doesn't seem to be working well, one instance I heard nothing after answering, the next was garbled and full of static.

Images attached to this report
H1 General
ryan.crouch@LIGO.ORG - posted 07:36, Tuesday 11 August 2026 - last comment - 10:52, Monday 17 August 2026(91474)
OPS Tuesday day shift start

TITLE: 08/11 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 9mph Gusts, 4mph 3min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.06 μm/s 
QUICK SUMMARY:

Comments related to this report
ryan.crouch@LIGO.ORG - 08:09, Tuesday 11 August 2026 (91475)SUS
Link

The M2 stage of the BS has been moving a lot since yesterday afternoon ~21:17 UTC, the oplev damping has grown with it.

Images attached to this comment
louis.dartez@LIGO.ORG - 08:42, Tuesday 11 August 2026 (91476)
Link 

The BS oplev damping was turned back on by me inadvertently yesterday. The OLDAMP Gain increases happened right as I requested DOWN from the ISC_DRMI guardian. Masayuki and I did notice additional motion on the BS yesterday but we didn't know at the time whether it was due something we did or from something someone else was doing. Now, looking at the timing of the grd state request and confirming by looking at ISC_DRMI.py, I can say that the BS oplev damping was 1.) turned on by accident and 2.) can be / should be turned back off.
Images attached to this comment
elenna.capote@LIGO.ORG - 08:48, Tuesday 11 August 2026 (91477)
Link

I tried to SDF the oplev damping off, see 91267, but I never checked what the guardians do. I recommend we change the guardian code to not engage oplev damping until we can diagnose why it isn't working, specifically, saturating the suspension.

louis.dartez@LIGO.ORG - 10:52, Monday 17 August 2026 (91564)
Link 

This was messing us up again today. I commented out the BS Oplev DAMP lines in the ISC_DRMI DOWN state.
H1 General
anthony.sanchez@LIGO.ORG - posted 16:29, Friday 07 August 2026 (91452)
Friday Ops shift report.

TITLE: 08/07 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY:
Dust levels for H1:PEM-CS_DUST_LAB1_300NM_PCF is climbing up to 70,000 counts today. I imagine that the Dust level is goign to continues to rise with the wind this weekend. 

Input Alignment team has a PLAN, which is a simple matter of just walking the mirrors.  

Output  Arm team has been looking for MAXIMUM_POWER through their straws in HAM7, Note: Removed yellow View Port cover and left a guillotine in place on HAM6  & Misaliging SR2 & SR3.  

VAC team reports:  "Cryo Traps are open to the Beam Tubes." &  "The Corner station is still isolated from the Beam tubes." 

End Station Y had it's PCAL Integrating sphere returned today after it was stolen for some lab measurements last night. 

LOG:

Start Time System Name Location Lazer_Haz Task Time End
14:53 FAC Kim LVEA n Technical cleaning. 15:35
15:30 VAC Jordan LVEA n Taking pics of GV6 status 16:00
17:12 SQZ Sheila & Ryan S LVEA YES Power measurements In HAM7 19:42
18:29 VAC Jordan & Mitchel LVEA y/n opening ION pumps in the LVEA 19:14
19:49 PCAL Tony, Cory PCalLab, EY YES Taking Ey's PCAL Sphere back to EY's Laser Enclosure. 21:05
20:01 FAC Tyler +1 EY - Wellhead work 22:01
20:24 CDS Marc, Caroline CER - Swapping ISC power supply 21:04
20:26 PEM Carlos, Shrey, Miranda Overpass - Seismometer tests 22:26
20:37 VAC Jordan LVEA - Opening/closing GVs 22:25
21:08 SQZ Sheila & Ryan LVEA HAM7 YES Power Budget measurments & Beam Profiling 23:08
22:09 CDS Dave CER N Looking at the accelerometer.... Specifically Not Touching it 22:25
22:35 CDS Dave Miranda CER N Checking on more accelerometer chassis cabling 23:15
22:43 VAC Jordan LVEA HAM6 yes Isolating turbo pumps, and turning on the ION pump in HAM6 22:54
H1 General (SUS)
anthony.sanchez@LIGO.ORG - posted 08:05, Friday 07 August 2026 - last comment - 09:00, Friday 07 August 2026(91441)
Friday Ops morning shift report.

TITLE: 08/07 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 3mph Gusts, 1mph 3min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.06 μm/s 
QUICK SUMMARY:

I came in this morning to a Vacuum Alarm on H0:VAC-EX_X2_PT524_PRESS_TORR. Wait! Dont panic! Vac Team had already put in an alog about it. 
Other than that Every thing looks good.... EXCEPT:  the RMS 1 & 2 are saturating for some reason. Tagging SUS
This started to happen at a round 7  UTC .  I took those Suspensions to Safe.

Comments related to this report
anthony.sanchez@LIGO.ORG - 09:00, Friday 07 August 2026 (91442)
Link

These Saturations were caused by the DC Centering Loops being turned on about 10 seconds after the IMC unlocked. They ramped up and started to saturate the suspensions all night. The solution was to kill the DC centering loops AND clear the History.

 

H1 General
anthony.sanchez@LIGO.ORG - posted 16:35, Monday 03 August 2026 (91373)
Ops Monday report

TITLE: 08/03 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 11mph Gusts, 7mph 3min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.07 μm/s 
QUICK SUMMARY:
The well pump was not working today due to some electrical issue. Last I heard FAC had a contractor on site to check on the well. So there is limited amounts of water here. Many folks were asked to work from home if they can. 

GRB-Short E644098 @ 17:29 UTC

Jonathan started working on the FrameWrite0 today, installing Deb12 OS. 

End stations were misaligned today to some tests that Camilla was doing.

ITMX ISI Stage 1 & 2 WD tripped twice today. Jim went out to the CER today to fix this.

Vac Team did some work on the GV6 Gate Valve today and GV6 is currently Open on the Y arm, But GV5 is still closed so the corner volume is still not open to the Arms yet. 

 

Start Time System Name Location Lazer_Haz Task Time End
15:10 FAC Kim LVEA y Technical cleaning & resupply 17:00
15:41 CDS EJ Remote N Test on OAF 15:42
15:43 FAC Tyler, Eric, & contractors EY N Working on the well 20:39
15:48 SQZ Camilla LVEA HAM5 YES Opening ViewPort on HAM5 15:55
16:10 FAC Kim Mid X N Tecnical Clkeaning & resupply 17:01
16:11 SEI Jim LVEA n working on SEI near BSC2 18:08
16:41 VAC Jordan & Travis LVEA GV6 N Working on the Gate Valve 18:39
17:20 SEI Jim remote CER N Tests on HAM2 & looking at Wiring 18:22
17:25 VAC Gerardo LVEA N Checking on GV6 work 19:25
17:45 CDS Partick MSR N CDS work? 18:06
18:39 FAC Kim HAM Shaq N technical Cleaning & Resupply 19:07
19:05 CDS Jonathon Remote N Re-imaging FW0 22:04
19:59 SEI Jim Remote N Tests on HAM3 21:25
20:03 VAC Jordan LVEA N Getting pics of GV6 20:07
20:51 VAC Travis & Gerardo End Y N Using the pump cart for Anulus work. 21:28
21:10 SQZ Camilla & Ryan S LVEA HAM7 YES Beam Profiling with M2**2 profiler. Ryan Out early 23:10
21:12 SEI Jim CER N troubleshooting ITMX ISI WD trips. 21:24
21:43 VAC Jordan LVEA GV6 N Checking on GV6 status 22:28
22:41 VAC Jordan & Gerardo LVEA GV6 N Opening GV6 00:11
22:46 SQZ Sheila LVEA HAM7 YES Working on the Power budget 00:16
H1 General
anthony.sanchez@LIGO.ORG - posted 08:09, Monday 03 August 2026 (91365)
Monday Ops Morning report

TITLE: 08/03 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 4mph Gusts, 2mph 3min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.09 μm/s 
QUICK SUMMARY:

IFO status: Currently Unlocked. Both GV5 and GV7 are shut..... for now.
Corner pump down continues.
Spool cameras work to reinstall IR cameras.
More Distributed acoustic  sensing DAS system.

H1 General
anthony.sanchez@LIGO.ORG - posted 19:02, Thursday 30 July 2026 (91340)
Thurs Ops Eve report.

TITLE: 07/31 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY:
ITMX ISI stage 1 & 2 WD tripped and there seems to be some ground motion there that may have tripped them.

But The BS HEPI and ISI seems to be fine as of writing!

H1 General
anthony.sanchez@LIGO.ORG - posted 17:01, Thursday 30 July 2026 - last comment - 17:44, Thursday 30 July 2026(91335)
Thursday Ops Eve* report.

TITLE: 07/30 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: Oli
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 15mph Gusts, 9mph 3min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.09 μm/s 
QUICK SUMMARY:
Not much going on today as the CDS team was working on the file system today.

Comments related to this report
anthony.sanchez@LIGO.ORG - 17:44, Thursday 30 July 2026 (91337)CDS, SEI
Link

Revived BS's Hepi and ISI. Lets see if it's more stable now.

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