Wed Apr 02 10:04:28 2025 INFO: Fill completed in 4min 25secs

Fill tripped on a LN2 spurt before the main flow, but still looks like a good fill.

Ibrahim, Ryan S, Erik, Dave:

Around the same time as there was work being done at the corner station mechanical room mezzanine, h1sush7 had a timing glitch requiring the restart of the h1iopsush7 model (and therefore all user models).

Ibrahim and Ryan S consolidated the SDFs for h1susfc1, h1sussqzin and verified the mezanine work was completed.

We restarted all the models, reset the SWWD, cleared IPC and CRC errors to return the system to nominal.

I have added this event to an already opened ticket for h1sush7 FRS20317

Wed02Apr2025
LOC TIME HOSTNAME     MODEL/REBOOT
09:55:21 h1sush7      h1iopsush7  
09:55:35 h1sush7      h1susfc1    
09:55:49 h1sush7      h1sussqzin  
09:56:03 h1sush7      h1susauxh7  
 

Ryan S, Ibrahim

In prep for Fil turning off the high voltages, we ramped down and disabled some systems that use it, outlined in M1300464 (screenshot attached of specific page).

The following settings were changed:

• ZM4/5 PSAMs ramped down - not in the above doc but on Fil's WP by Sheila's suggestion
• Pico High Voltages were disabled
• SQZ Opo TECs disabled

Yesterday I moved a pumped dust monitor into the HAM1 clean room (dust monitor LVEA5). I set the alarm levels to clean-100 following E1600132 and took a look at the trend overnight. The 0.5u particle count was steady around zero and the 0.3u was around ~10 counts overnight.

Janos, Gerardo, Dave:

Following some alarms overnight we have decided to remove the LVEA gauges from VACSTAT for the duration of the vent. The other gauges which will remain under vacuum continue to be monitored, but without the increased sensitivity settings.

In order to keep the EDC green, a vacstat_dummy_ioc.py is running on opslogin0 to simulate the channels associated with the removed gauges (HAM1, HAM6, BSC2, BSC3).

The cell phone alarms to the vacuum group on multiple vacstat detections has also been disabled.

TITLE: 04/02 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: 6mph Gusts, 4mph 3min avg
    Primary useism: 0.17 μm/s
    Secondary useism: 0.17 μm/s
QUICK SUMMARY:

IFO is in PLANNED ENGINEERING for the vent.

Today's vent tasks:

• Crane engine hoist to BSC8 (FAC)
• Inspect HAM1 and BSC8 final cleanroom (FAC)
• Turn on HAM1 cleanroom and garb room (FAC)
• Power down ISC chassis that will be recabled (Fil/EE)
• Pull ISC cables - NOT COAX yet and work to relabel (Fil/EE)
• HAM1 Offload HEPI Setup (SEI/Jim/Mitchell)
• Leak check corner under vac (VAC)
• Prep for corner vent (VAC)
• Checklist for HAM1 vent (VAC)
• HAM1 1st cleaning (Kim/Nellie/FAC)
• Clean out recieving for ISI (FAC)
• HAM6 Guage Work (VAC)
• Checklist for corner vent (VAC)
• Move forklift to HAM1 south bay area (FAC)
• Crane or move power bang box to southbay for cleanrooms (FAC)
• Replace ~3ft of cleanroom panel for HAM2 +Y-X (FAC)
• Vent HAM1 (VAC)
• Start HAM1 bolt removal (VAC/Randy)
• Move HAM1 cleanroom into final place (5 people)
• Stock garb room by HAM3 (FAC/Kim)
• Prep laydown areas for stack deinstall, setup door pallet at HAM3+Y
• Get dust mons working and trending (OPS/RyanC)

Work safe!

WP 12424
The field cabling for RM1 and RM2 was disconnected in the CER and field rack. Cables were pulled back from ISC-R4 to SUS-R1. Cables were installed early on and buried in the cable tray. It was decided to cut the connector to ease cable work. Ends will need to be re-terminated. The PM1 field cables arrived onsite and will be installed tomorrow. Work will be outside the HAM1/2 clean room.

WP 12393
The SEI field cables were pulled to the following HAM1 flange locations:

Corner 1 (GS-13, L4C, ISI Coil Drive) to Flange D1
Corner 2 (GS-13, L4C, ISI Coil Drive) to Flange D5
Corner 3 (GS-13, L4C, ISI Coil Drive) to Flange D3
HEPI Corner 1&2 to Flange D5
HEPI Corner 3 to Flange D3

WP 12421
Cabling to IOHT2L and ISCT1 was disconnected. Both sets of cables were pulled out of the clean room, clear of any HAM1 activities. The safety interlock system was tripped when cables were being moved off ISCT1. Safety system was restored. The field EtherCAT field boxes EL1908 and cables are located on top of HAM1. They should not interfere with door removal/install.

WP 12422
The vertical cable tray, conduit and part of the floor cable tray was removed to clear the HAM ISI Installation Fixture. Cables to ISCT1 are now routed along the cable tray outside of the clean room.

We took time to pull out various DB cables, fibers, RF cables ect that were not being used. Area around HAM1 is now clear. Let us know you see or need anything else moved/cleared for the ISI install.

F. Clara, O. Patane, M. Pirello

- The corner station clean air supply (Kobelco) was started up
- The following GVs have been closed: GV5, GV2, RV1, FCV1, FCV2, FCV3, FCV4, FCV5
- The IPs adjacent to this part of the corner volume have been valved out: IP1, IP2, IP3, IP4, IP14
- The replacement of the HAM6 gauge was attempted, but the electronics of the brand new Inficon replacement gauge is faulty, therefore another one will be installed tomorrow
- The Y-manifold turbo has been valved in with a leak checker backing, and the following flanges have been leak checked (no leaky flanges yet):
 - Y-manifold flanges:
  - X-; Y+ flanges (3 pcs.)
  - Vent port (1 pc.)
 - BSC8:
  - X- HEPI bellows (2 pcs.)
  - X- collar flanges (4 pcs.)
  - X+ Y+ side flanges (3 pcs.)
  - X+ door flanges (5 pcs.)
 - HAM2-HAM3 spool:
  - X+ Y+ side flanges (5 pcs.)
  - X+ bottom flange (1 pc.)
 - HAM3:
  - Y+ door flanges: (5 pcs.)
  - X- bottom flange (1 pc.)
  - Y+ bellows (2 pcs.)

TITLE: 04/01 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY:

IFO is in PLANNED ENGINEERING for VENT

Extremely productive first vent day in which the following planned tasks were completed:

• Transition to Laser SAFE - vent, close light pipes, keys off (TJ) - DONE
• Turn Guard States to appropriate DOWN states (OPS) - DONE
• Close gate valves (VAC) - DONE
• Get purge systems going (VAC) - DONE
• Lock all HAM HEPIs (JIM/SEI) - DONE
• Crane large West Bay cleanroom over BSC8, inspect (FAC) - DONE
• Crane engine hoist to BSC8 (FAC)
• Inspect HAM1 and BSC8 final cleanroom (FAC)
• Turn on HAM1 cleanroom/garb room
• Disconnect ISCT1 cables and see if needed on IOT2 (EE/Fil) - DONE
• Disconnect cable trays from HAM1 (EE/Fil) - DONE
• Mark and move ISCT tables at HAM1 and HAM2 (Camilla/AOS) - DONE - alog 83686
• Remove scaffolding on HAM1/2 +Y (TJ) - DONE - alog 83686
• Power down ISC chassis that will be recabled (Fil/EE)
• Pull ISC Cables - NOT COAX yet and work to relabel
• HAM1 Offload HEPI Setup (Jim/Mitchell/SUS)
• Leak Check corner under vac (VAC)
• Prep for corner vent (VAC)
• Checklist for HAM1 Vent (VAC)
• Set ESD bias drive to XX to reverse charge trend while vented (OPS) - DONE

As always, check out the trello for the most up to date vent news.

Guardian states are in the configurations attached in the screenshot

LOG:

TJ, Ibrahim, Betsy, Camilla, WPs 12428, 12414

We added guillotines to all VPs, removed the bellows and added yellow VP covers. IOT2 bellows were very tight so couldn't be removed until we moved the table an ~inch away from HAM2.  The tables bellows adapters were covered with ameristat and the bellows were covered with foil and placed on a nearby rack. Photo.

We moved the small garbing cleanroom up against the TSCY / the HAM3 cleanroom. We moved ISCT1 and IOT2 next to it on the other side of the racks, leaving space and a pallet for the HAM1 door. Photo. 

TJ and I removed and disassembled the HAM2 scaffolding and stored it with the other scaffolding in the High bay. 

Tue Apr 01 10:12:47 2025 INFO: Fill completed in 12min 43secs

Eric, Dave:

Bypass will expire:
Tue Apr  1 11:52:44 AM PDT 2025
For channel(s):
    H0:FMC-CS_FIRE_PUMP_1
    H0:FMC-CS_FIRE_PUMP_2
 

[M. Todd, C. Compton]

Camilla and I made several knife edge measurements of the L5 CO2 laser in the optics lab after she got back from her trip to Access. The beamwidth estimates are consistent with tests done by Gabriele and Camilla

Measurements:

1.  20250327 - razorblade 16cm from laser aperature
2.  20250328 - razorblade 16cm from laser aperature (moved laterally to have more range)
3.  20250328v2 - razorblade 16cm from laser aperature

Results:

Fits to both the numerical derivative and cumulative yield similar estimates of the beamwidth (1/e^2 radius) : around 1.3mm at 16cm from the aperature is consistent with the beam profiles done in Gabriele and Camilla's test, which estimated the beam waist to be around 1.2mm.

Follow up to LHO alog 83200 and LHO alog 80863.

Brian and I thought of a better way of getting the M1 OSEMs in PR3 calibrated relative to the HAM2 GS13s: Use the ISI drives in L, T, V for frequencies above the suspension resonances to get an absolute calibration.

We can use the measurements Jeff took in LHO alog 80863 and project them in the OSEM basis, then use the translational (Longitudinal, Transverse, Vertical) drives to calibrate the OSEMs. Since the GS13s are calibrated to [m] all of the transfer functions (shown in the first attachment) are in [OSEM meters]/[GS13 meters]. At high frequencies (sufficiently above the resonances) the OSEMs should just be measuring (-1)*ISI motion, because the suspension is isolated. The calibration error will depend on how well we are able to drive L,T,V from the ISI without cross-coupling to any other DOF.

Figure 1 attached shows the 6x6 transfer matrix between the ISI drives and OSEMs (inputs are columns, and outputs are rows). We highlight the 6 translational transfer functions that can be used to calibrate the OSEMs in red. The drives seem decoupled enough to do the calibration (for example, we expect to see a length drive only in LF and RT, no motion anywhere else).

Figures 2,3, and 4 show a detail of the 6 transfer functions we will use for calibration, all of them should be scaled to 1 [OSEM m]/[GS13 m]. The scalings are:

(Dave Barker, Fil Clara, Jenne Driggers, Corey Gray, Gerardo Moreno, plus those who signed work permit and whom I phoned last night)

Last Night Recap:
Last night at 959pmPT, there was an audible alarm for the HAM6 vacuum gauge (PT110).  Gerardo went out to check to see if it was dead.  He phoned Fil and they did a power cycle of the gauge to see if this would improve the situation, but it did not.  After this, H1 was taken to IDLE for the night (OWL shift cancelled).  (Should have taken Observatory Mode to CORRECTIVE MAINTENANCE at this point, but only remembered to do this this morning.)

Work Permit 12260 generated.  Fil arrived on-site around 9amPT (17utc).

This Morning's Summary of Fil's Work:

The HAM6 Interlock (for operations of the Fast Shutter + PZT) is now Using the BSC3 Interlock (or VAC gauge from BSC3 since it was decided to BYPASS the HAM6 VAC gauge which failed last night [alog 82005]).  This means that the BSC3 Interlock is no longer being used for the ITM ESDs (which sounds like it's fine because Jenne/Fil said we don't use the ESDs for the ITMs).

Fil noted that he confirmed that the Fast Shutter Chassis in the LVEA is OPERATIONAL.  Fil then left the site after giving me this summary.

As far as a test of this new HAM6 Interlock configuration, I intentionally ran a test of the AS Port Protection system (sitemap/SYS/ AS Port Protection....this was my first time doing this).  After clicking the RUN (test) button, after a few seconds received an "OK" for the (1) Test & (2) Fault.  After this test and the signed-off Work Permit, we are OK to GO for High Power locking.

Currently running an Initial Alignment (note:  ISC_LOCK initially went into ERROR [red box] when I selected Initial Alignment (screenshot of error message attached).  LOAD-ing ISC_LOCK (suggested in the Log) cleared this up.

ALSO: 

• Attaching a screenshot of the AS Port Protection medm
• CDS Alarm box on the CDS Overview remains (related to the lingering issue of the failed PT110 gauge).