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Reports until 16:25, Monday 09 June 2025
LHO General
corey.gray@LIGO.ORG - posted 16:25, Monday 09 June 2025 (84907)
Mon Eve Ops Transition

TITLE: 06/09 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: Ryan C
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 13mph Gusts, 7mph 3min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.16 μm/s
QUICK SUMMARY:

Locking work continues with H1 getting past 60W and commissioners focusing on ASC steps around LOWNOISE states (most recent lockloss was a DHARD pitch ring up. 

As for locking, it looks like H1 is locking decently, but Tony did say he ran a recent Manual Alignment.  Alignment-wise we are still running manually with PRC step only being partly run---basically take to PRX and touch up ASC-AS_A by hand via PRM (this is what we have been doing the last few weeks).

Plans are to take H1 to MAX POWER and continue ASC work.

Oh and for the forecast tonmight, we have a warning of high winds!  (We are also very hot---just under 105degF now).

H1 CDS (CDS, SEI)
patrick.thomas@LIGO.ORG - posted 16:03, Monday 09 June 2025 (84905)
work on h1brsex and h1brsey
I copied the contents of C:\SlowControls on h1brsex and h1brsey onto a usb stick. I committed changes local to h1brsex into svn. I ran svn update on h1brsey. I was just expecting the changes I committed from h1brsex to show up, but a whole lot more did. I guess no one had run svn update in a long time. It appeared to complete without conflicts and reported that it was now at revision 6189. I started committing files to svn on h1brsey that I thought did not conflict between the two machines, but I think I accidentally committed one that does. I committed local changes on h1brsey to /trunk/BRS2 C#/BRSReadout/configs/LHOEY.config, but afterward found that there are also local changes to the same file on h1brsex.
X1 SUS
ibrahim.abouelfettouh@LIGO.ORG - posted 15:56, Monday 09 June 2025 - last comment - 16:31, Monday 09 June 2025(84904)
BBSS Vibration Absorber Installed

Ibrahim, Rahul

Rahul and I installed the BBSS Vibration Absorbers. We then took more B&K measurements and Rahul is analyzing them. Pictures attached.

Images attached to this report
Comments related to this report
rahul.kumar@LIGO.ORG - 16:31, Monday 09 June 2025 (84910)SUS

The above are D1002424, FM/BS config. (see page 2 of the document, top right figure for reference). 

H1 TCS
anthony.sanchez@LIGO.ORG - posted 15:29, Monday 09 June 2025 (84903)
TCS Chiller Water Level Top-Off_Weekly

Weekly TCS Chiller Water Level Top-Off FAMIS 27815

TCSX - 30.5 No water added
TSCY - 10.5 no water added

Reported in https://dcc.ligo.org/T2200289 .

H1 ISC
jenne.driggers@LIGO.ORG - posted 14:32, Monday 09 June 2025 (84902)
Green references reset after 2W ASC today

Green Refs reset now that we had all of the 2W ASC on and converged.  SDFs saved in the safe.snap

Images attached to this report
H1 ISC
camilla.compton@LIGO.ORG - posted 12:57, Monday 09 June 2025 (84900)
ISCT1 Re-aligned (again)
Elenna, TJ, Camilla 
 
Realigning ISCT1 after it was moved on Friday for the HAM1 +Y annulus work. Mostly done apart form touching up POPAIR A/B diodes once we have a locked PRMI/DRMI.
 
After the gate values opened, TJ and I tried to lock the green arms in REFL as we did in 84323. They didn't stay locked but the periods they were locked were comparable to a normal lock. MICH and PRMI flashes were bad but not terrible. Checked that PRM was within 10urad of last DRMI locked time. So we went to ISCT1 to start aligning the green and PSL ALS path.
 
Green
TJ adjusted the upper pericope mirror in PIT and YAW and this improved the alignment both Green X and Y arm cameras and the PSL ALS beam. The beam went though the SHG fine. We added an extra beam-dump after one of the beam-splitters to catch some extra beam scatter. 
We then touched up the green arms with ETMs/TMSs, Ryan C turned on sensor correction and the arms could then locked normally and WFS turned on.  
Elenna then aligned the beams onto the diode to get the COMM beatnote to get to 0dB.
At this point I started looking at the POP alignment and we noticed it was bad so Elenna went to the CR and did input align and MICH alignment with the Guardian and a PRX-by hand. 
After this, Elenna and TJ touched up the beams onto the DIFF beatnote to get to it to -11dB
Checked all beambumps on ALS and green paths.
 
REFL
The beam started on the both REFLAIR A and B diodes. TJ then centered the beam on both diodes with their steering mirrors.
Partick and the CDS team initialized the new digital REFL camera 84866 and the beam was on it!
 
POP
TJ Yaw-ed the top periscope mirror as the beam was clipping the shutter (he then realigned REFL). then I checked that the beam was on all POP optics and touched steering mirrors to by-eye get beam flashes on POPAIR_A/B. We couldn't lock PRMI or see the PRX single bounce beam but could only see flashes on POPAIR_A/B. All beamdumps checked.
Once Jenne and Elenna locked DRMI and lowered the "lockloss" offsets, TJ and I went back to ISCT1 and checked the centering of the beams on POPAIR_A/B both beams were not near edges of diodes. We could not see the beam on POPAIR camera.
H1 CDS
jonathan.hanks@LIGO.ORG - posted 11:28, Monday 09 June 2025 (84901)
WP 12610 Do the software setup for the ISCT1 REFL digital camera (daqd restart needed eventually)

Patrick Thomas, Jonathan Hanks, David Barker,

As a followup to WP 12574 we did the software setup for the ISCT1 REFL camera.  This is replacing the analog camera with a digital IP camera.  It is now h1cam37.

The only problem we had, was when assigning dhcp addresses we had already seen this camera and assigned it to msr-test-cam... So after removing the msr-test-cam entries from DNS and DHCP the camera came up as h1cam37 and started working.

I've attached a screen shot that Patrick took which shows where it is on the camera overview plus a sample of the data.

Images attached to this report
LHO VE
david.barker@LIGO.ORG - posted 10:40, Monday 09 June 2025 (84898)
Mon CP1 Fill

Mon Jun 09 10:09:58 2025 INFO: Fill completed in 9min 55secs

Travis confirmed a good fill curbside.

Images attached to this report
H1 PSL
ryan.short@LIGO.ORG - posted 10:04, Monday 09 June 2025 (84897)
PSL 10-Day Trends

FAMIS 31089

PMC REFL and RefCav TPD both had a bit of a drop-off over the past 3-4 days, but PMC TRANS is largely unchanged. We've seen correlation before with changing outdoor temperatures and RefCav alignment, so I suppose it's possible the recent heat wave is having an effect on the PMC as well.

Images attached to this report
LHO VE
david.barker@LIGO.ORG - posted 08:59, Monday 09 June 2025 - last comment - 10:48, Monday 09 June 2025(84896)
EY cryopump CP7 below nominal fill level

The PID controller for EY CP7 cryopump has opened its liquid level control valve (LLCV) to 100% but this is proving to be insufficient to maintain a 92% fill level in the pump. The pump level started deviating from nominal around 4pm Friday 06jun2025 PDT.

Vacuum team is investigating.

Note: no alarms issued at this point, the cyropump alarm level is < 80%, CP7 currently is at 85%.

Images attached to this report
Comments related to this report
gerardo.moreno@LIGO.ORG - 10:48, Monday 09 June 2025 (84899)VE

I had noted the LLCV issue for CP7 here.  Tomorrow we'll attempt to re-zero the LLCV actuator.

H1 ISC (SQZ, TCS)
camilla.compton@LIGO.ORG - posted 08:51, Monday 09 June 2025 (84894)
ISCT1 Bellows Back on, all LVEA lasers back on.

TJ, Camilla WP 12605WP 12593

As HAM1 is now low enough in pressure, we removed the HAM1 +Y yellow VP covers, re-attached bellows and removed guillotines. ISCT1 was moved back into place on Friday 84850.

After TJ transitioned to Laser Hazard, we opened the ALS and PSL light pipes and turned back on the SQZ, CO2s and HWSs lasers.  

After okay from VAC, IMC locked without issue, PRC and MICH alignments look good enough on AS AIR camera and we will begin realigning ISCT1 soon.

H1 General
ryan.crouch@LIGO.ORG - posted 07:35, Monday 09 June 2025 - last comment - 08:57, Monday 09 June 2025(84892)
OPS Monday day shift start

TITLE: 06/09 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: MAINTENANCE
    Wind: 4mph Gusts, 2mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.12 μm/s
QUICK SUMMARY:

Images attached to this report
Comments related to this report
ryan.crouch@LIGO.ORG - 08:57, Monday 09 June 2025 (84895)

We relocked the IMC at 15:34, and Gate Valves 1 & 2 are now open.

LHO VE
david.barker@LIGO.ORG - posted 15:24, Sunday 08 June 2025 (84890)
Sun CP1 Fill

Sun Jun 08 10:08:17 2025 INFO: Fill completed in 8min 13secs

 

Images attached to this report
LHO VE
janos.csizmazia@LIGO.ORG - posted 16:57, Friday 06 June 2025 - last comment - 01:36, Monday 09 June 2025(84875)
HAM1 reventing and VAC troubleshooting
Gerardo, Travis, Randy, Janos

Today we executed WP 12595, reventing, troubleshooting, closing, and re-pumping HAM1. The times of the operations are approximate.

08:00 - 08:30: GV1 and GV2 large gate valves have been closed. HAM1 turbo and Ion pump (IP13) have been valved out. The annulus IPs have been switched off, the annulus volume has been vented. Also, IP3 was valved in to the corner, after the successful troubleshooting yesterday (see aLog 84826).
08:40 - 09:53: The chamber was vented with bottled Nitrogen. Approximately 2 full bottles were needed. Only metallic parts were used between the venting port and the bottle (no plastic tubes), and the tube was flushed with Nitrogen beforehand.
10:00 - 10:40: The Y+ door has been taken off. The O-rings have been inspected, then removed. A human hair was found at 6:30 o'clock, and a little piece of white tape was found in the O-ring's groove at 8:00 o'clock, and overall, the O-rings and grooves were substantially dirty. Pictures about these in the comments. Also, the cleanroom was needed to be moved Y+ direction, to give enough room for the forklift.
10:40 - 11:40: Chamber work. During this time, Randy stayed with the forklift, so the door was hanging from it all the time, and inside the cleanroom.
11:45 - 13:30: O-ring installation: it took a few tries, but both O-rings were installed nicely. Then, installing back the door: smooth process, with shoving it in as the last step, to avoid the O-rings falling out.
13:20 - 13:50: Pumping of the annulus systems, and roughing the chamber. The HAM1 side annulus needed ~10 mins to go below the pressure it reached in the last 2 weeks, so the troubleshooting was very successful! The roughdown goes well, too.
16:15 - 16:45: Transitioning to turbo
Comments related to this report
janos.csizmazia@LIGO.ORG - 17:00, Friday 06 June 2025 (84876)
Because of the safety concerns of the high amount of Nitrogen in the chamber after venting, and then opening the door, Oxygen sensors have been used during the door opening process.
Moreover, because of these same reasons, and because of the lack of purge air, a crossflow from a HEPA-filtered fan was also used (additionally to the cleanroom's HEPA fans), when the chamber was open.
travis.sadecki@LIGO.ORG - 17:51, Friday 06 June 2025 (84879)
Images attached to this comment
gerardo.moreno@LIGO.ORG - 01:35, Saturday 07 June 2025 (84882)VE

Left HAM1 with SS500 cart pumping, it was able to reach 5.0X10-05 Torr, at such pressure the cart system will allow the interlock to be engaged, this interlock is there to protect the chamber in case of an anomaly (power interruption, component failure, etc.) and its function is to close two valves on the cart.  HAM1 pressure when I left the site was a bit higher than the cart, 6.1X10-05 Torr.  Pumpdown appears nominal.

The annulus for HAM1 and HAM2 are doing good.  HAM1 was at 2.66x10-05 Torr, and the pressure on HAM2 annulus was at 7.57x10-06 Torr.

Images attached to this comment
gerardo.moreno@LIGO.ORG - 01:36, Monday 09 June 2025 (84891)VE

Plot comparing the current vs the previous pumpdown.  Blue trace is the current pumpdown.

Images attached to this comment
H1 ISC
camilla.compton@LIGO.ORG - posted 12:48, Friday 06 June 2025 - last comment - 11:32, Monday 09 June 2025(84866)
Analog Camera swapped to Gige Digital Camera on ISCT1. MLC Mirror and in-air POP-X WFS Removed.

Fil, Keita, Daniel, Camilla  WP12598 WP12584

We swapped the old REFL Analog Camera to a Gige Digital Camera (Basler acA720-290g m S/N 40477593) on ISCT1 and cabled to the table feedthrough. There was no beams today so the alignment may need to be touched up.

Keita and Daniel also removed the MCL steering mirror, controller and the in-air POP-X WFS (S1300511, now stored in the EE shop) with mirror and lens from ISCT1. MLC controller and PZT will be stored in mid station storage. The beamsplitter towards the old POP-X path stayed but was blocked with the beam dump that used to be dumping the POP-X reflection.

Table layout D1201103 not yet updated. Photo of table attached

Images attached to this report
Comments related to this report
keita.kawabe@LIGO.ORG - 11:32, Monday 09 June 2025 (84880)

Complete MCL PZT/controller inventory at LHO

Note 1: Each Mad City Labs PZT is supposed to be paired with a matching controller. Their manufacturer's serial number starts with MCLS (PZT) or MCLC (controller) but share the same number (e.g. MCLS02218 and MCLC02218). In the table below I only wrote down the number part.

Note 2: Each PZT and controller originally came in two separate boxes. These boxes for the units that are in use (or was at some point in time) weren't found in the MY storage except for one EX green WFS PZT/controller and another pair for EY.

Note 3: The PZT assembly for the old in-air POP-X that we pulled comprises the PZT, ALS Mad-City Labs base (D1300607), Mad-City Labs spacer (D1300608), Modified UPA1 holder (D1300124), and 1064nm HR 1" mirror. See 1st attachment.

Location Purpose S/N Notes Boxes?
EX Green inj 02218 alog 8080 Not found
02720

These replaced the high power unit (MCLC02219, the last row of this table), which was "to be replaced". alog 8080
Haven't checked if the PZT is MCLS02720 or 02219, but it's probably 02720.

Not found
Green WFS 02717   at MX, top shelf (3rd pic)
02719   Not found
EY Green inj 02718 alog 8080 Not found
02722 alog 8080 Not found

Green WFS

02721   at MX top shelf (3rd pic)
02724   Not found
MY storage H1 Spare 02723 "H1 Spare" written on the open box, mid shelf (3rd pic) In the original boxes
03126

Pulled from ISCT1 in Jun/2025. Used to be for old in-air POP-X. Mid shelf (1st/3rd pic).

PZT is stored as an assembly with ALS Mad-City Labs base (D1300607), Mad-City Labs spacer (D1300608), Modified UPA1 holder (D1300124), and 1064nm HR 1" mirror in a gray plastic bin, on which the controller is directly placed.

PZT assy in a gray bin.
3IFO 02725 All stacked up, "3IFO ISC" on the box (2nd pic) In the original boxes
03125 All stacked up, "3IFO ISC" on the box (2nd pic) In the original boxes
03127 All stacked up, "3IFO ISC" on the box (2nd pic) In the original boxes
03132 All stacked up, "3IFO ISC" on the box (2nd pic) In the original boxes
03133 All stacked up, "3IFO ISC" on the box (2nd pic) In the original boxes
03134 All stacked up, "3IFO ISC" on the box (2nd pic) In the original boxes
03135 All stacked up, "3IFO ISC" on the box (2nd pic) In the original boxes
03136 All stacked up, "3IFO ISC" on the box (2nd pic) In the original boxes
Spare of spare MCLC02219

Top shelf (3rd pic). Controller only (no PZT was found), high-power version (Nano-Drive 85), old EX unit which was replaced. alog 8080

This is 2U-high, accepts 110V AC rather than LIGO 3-pin DC and looks different from the rest of the controllers.

No box

 

Images attached to this comment
H1 ISC
camilla.compton@LIGO.ORG - posted 08:19, Friday 06 June 2025 - last comment - 08:49, Monday 09 June 2025(84850)
ISCT1 Moved away from HAM1 +Y Door

Randy, TJ, Fil, Richard, Camilla, WPs: 12593, 12594

After Fil and Richard un-cabled ISCT1, TJ and I added guillotines to HAM1 +Y VPs, removed bellows and attached yellow VP covers. Randy then fork-lifted ISCT1 away from HAM1 and placed it next to IOT2L.

Comments related to this report
camilla.compton@LIGO.ORG - 08:49, Monday 09 June 2025 (84893)

At the end of the day on Friday, Randy fork-lifted ISCT1 back to HAM1. Location and height was adjusted to match markings. We left the yellow VP covers on and bellows off as HAM1 VAC had started pumping. 

H1 TCS
camilla.compton@LIGO.ORG - posted 11:37, Tuesday 17 January 2023 - last comment - 16:12, Monday 09 June 2025(66832)
TCS HWS SLED Stock.
Last recorded on alog 58758. Both were replaced in Dec 2022 (66179) so we expect they will be fine until the end of 2023.
Currently have two new 840nm spares, and one 790nm used spare that could be used in a pinch. We will order more spares. 

* Added to ICS DEFECT-TCS-7753, will give to Chrisitna for dispositioning once new stock has arrived. 

Comments related to this report
camilla.compton@LIGO.ORG - 12:47, Monday 30 January 2023 (67079)

New stock arrived and has been added to ICS. Will be stored in the totes in the TCS LVEA cabinet. 

  • ITMX: Superluminescent Diode QSDM-790-5 
    • S/N 11.21.380
    • S/N 11.21.382
    • S/N 05.21.346 (note the data sheet is labeled 04.21.346 but QPhotonics noted this is a typo) 
  • ITMY: Superluminescent Diode QSDM-840-5
    • S/N 11.21.303
camilla.compton@LIGO.ORG - 15:33, Thursday 10 August 2023 (72139)
  • ITMX: Superluminescent Diode QSDM-790-5 
    • S/N 06.18.002 - used spare
    • S/N 11.21.380
    • S/N 11.21.382
    • S/N 05.21.346 - Installed July 2023 71476
    • S/N 07.14.255 Old sled, removed 71476
  • ITMY: Superluminescent Diode QSDM-840-5
    • S/N 03.20.479 
    • S/N 06.16.005 
    • S/N 11.21.303 - Installed July 2023 71476
    • S/N 11.17.127 Old sled, removed 71476

ISC has been updated. As of August 2023, have 2 spare SLEDs for each ITM HWS.  

camilla.compton@LIGO.ORG - 14:41, Tuesday 10 October 2023 (73373)
  • ITMX Superluminescent Diode QSDM-790-5 
    • S/N 06.18.002 - used spare
    • S/N 11.21.380 - Installed Oct 2023 73371
    • S/N 11.21.382
    • S/N 05.21.346 - Old sled, removed  73371
    • S/N 07.14.255 Old sled, removed 71476
  • ITMY: Superluminescent Diode QSDM-840-5
    • S/N 03.20.479 - Installed Oct 2023 73371
    • S/N 06.16.005 
    • S/N 11.21.303 - Old sled, removed  73371
    • S/N 11.17.127 Old sled, removed 71476

ISC has been updated. As of October 2023, have 1 spare SLEDs for each ITM HWS, with more ordered.  

camilla.compton@LIGO.ORG - 15:31, Wednesday 06 December 2023 (74645)

Spare 8240nm SLEDs QSDM-840-5 09.23.313 and QSDM-840-5 09.23.314 arrived and will be placed in the TCS cabinets on Tuesday. We are expecting qty 2 790nm SLEDs too. 

camilla.compton@LIGO.ORG - 16:26, Thursday 14 March 2024 (76393)

Spare 790nm SLEDs QSDM-790-5--00-01.24.077 and QSDM-790-5--00-01.24.079 arrived and will be placed in the TCS cabinets on Tuesday. 

camilla.compton@LIGO.ORG - 16:12, Monday 09 June 2025 (84906)

In 84417, we swapped:

The removed SLEDs have been dispositioned, DEFECT-TCS-7839.

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