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).

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.

Ibrahim, Rahul

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

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 .

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

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.

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

Travis confirmed a good fill curbside.

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.

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%.

TJ, Camilla WP 12605, WP 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.

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:

• HAM1 pressure is at 2.64e-06
• ISCT1 table realignment today

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

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

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. 

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.

• ITMX: Superluminescent Diode QSDM-790-5 
  • S/N 06.18.001 - removed alog#61892 - will disposition*
  • S/N 06.18.002 - removed with 0.8mW alog#66179 - will keep as used spare. 
  • S/N 07.14.254 - removed alog#44201 - will disposition*
  • S/N 07.14.256 - removed alog#41411  - will disposition*
• ITMY: Superluminescent Diode QSDM-840-5
  • S/N 03.20.479 - new in sealed box
  • S/N 06.16.005 - new in sealed box
  • S/N 11.17.126 - removed with 0.19mW alog#66179  - will disposition*

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