In order to further test out the environment automation for the SEI_ENV node, I've removed all state requests of its subborndinate nodes to allow this node to make it's transitions without actually doing anything. In other words, SEI_ENV will change state, but nothing will actually be changing outside of this node. We will run it like this for the duration of the break.

If there are model restarts for any of the ISI models, it would be a good idea to re-request the SEI_CONF state of SC_OFF_NOBRSXY to verify that we are still in the correct sensor correction state.

FAMIS 20012

Temperatures all around have been less than stable recently, but that's not terribly surprising with ongoing vent activities.

The FSS TPD signal has plummeted in the past 10 days; we may need to touch up the FSS path on-table to fully fix this, but we'll likely wait towards the end of the commissioning break.

TITLE: 01/22 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    SEI_ENV state: MAINTENANCE
    Wind: 6mph Gusts, 4mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.24 μm/s
QUICK SUMMARY:

After site closure due to weather Fri, today the site is OPEN and road conditions were much less treacherous.  There was No 8am Coordination Meeting (items were discussed last week).

Alarm Handler audible Alarms this morning: 

• FMCS Temperature for zones 3A & 3B.
• PEM's PSL Dust Monitor 102

Not that it matters for O4Break, Microseism has taken a big drop DOWN from 0.5um/s to  0.2um/s.

Attached below are the snapshots of the transfer function measurements I took yesterday before we kick start the in-chamber work next week. The suspensions look healthy and is currently in air.

The templates are stored at the following location,

OPO

/ligo/svncommon/SusSVN/sus/trunk/OPOS/H1/OPO/SAGM1/Data

2024-01-20_2350_H1SUSOPO_M1_WhiteNoise_L_0p02to50Hz.xml
2024-01-20_2350_H1SUSOPO_M1_WhiteNoise_P_0p02to50Hz.xml
2024-01-20_2350_H1SUSOPO_M1_WhiteNoise_R_0p02to50Hz.xml
2024-01-20_2350_H1SUSOPO_M1_WhiteNoise_T_0p02to50Hz.xml
2024-01-20_2350_H1SUSOPO_M1_WhiteNoise_V_0p02to50Hz.xml
2024-01-20_2350_H1SUSOPO_M1_WhiteNoise_Y_0p02to50Hz.xml

ZM5

/ligo/svncommon/SusSVN/sus/trunk/HXDS/H1/ZM5/SAGM1/Data

2024-01-20_2340_H1SUSZM5_M1_WhiteNoise_L_0p01to50Hz.xml
2024-01-20_2340_H1SUSZM5_M1_WhiteNoise_P_0p01to50Hz.xml
2024-01-20_2340_H1SUSZM5_M1_WhiteNoise_Y_0p01to50Hz.xml

ZM4

/ligo/svncommon/SusSVN/sus/trunk/HXDS/H1/ZM4/SAGM1/Data

2024-01-20_2330_H1SUSZM4_M1_WhiteNoise_L_0p01to50Hz.xml
2024-01-20_2330_H1SUSZM4_M1_WhiteNoise_P_0p01to50Hz.xml
2024-01-20_2330_H1SUSZM4_M1_WhiteNoise_Y_0p01to50Hz.xml

ZM3

/ligo/svncommon/SusSVN/sus/trunk/HXDS/H1/ZM3/SAGM1/Data

2024-01-20_2320_H1SUSZM3_M1_WhiteNoise_L_0p01to50Hz.xml
2024-01-20_2320_H1SUSZM3_M1_WhiteNoise_P_0p01to50Hz.xml
2024-01-20_2320_H1SUSZM3_M1_WhiteNoise_Y_0p01to50Hz.xml

ZM2

/ligo/svncommon/SusSVN/sus/trunk/HXDS/H1/ZM2/SAGM1/Data

2024-01-20_2320_H1SUSZM2_M1_WhiteNoise_L_0p01to50Hz.xml
2024-01-20_2320_H1SUSZM2_M1_WhiteNoise_P_0p01to50Hz.xml
2024-01-20_2320_H1SUSZM2_M1_WhiteNoise_Y_0p01to50Hz.xml

ZM1

/ligo/svncommon/SusSVN/sus/trunk/HXDS/H1/ZM1/SAGM1/Data

2024-01-20_2310_H1SUSZM1_M1_WhiteNoise_L_0p02to50Hz.xml
2024-01-20_2310_H1SUSZM1_M1_WhiteNoise_P_0p02to50Hz.xml
2024-01-20_2310_H1SUSZM1_M1_WhiteNoise_Y_0p02to50Hz.xml

HSTS (FC1)

/ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/FC1/SAGM1/Data

2024-01-20_2300_H1SUSFC1_M1_WhiteNoise_L_0p02to50Hz.xml
2024-01-20_2300_H1SUSFC1_M1_WhiteNoise_P_0p02to50Hz.xml
2024-01-20_2300_H1SUSFC1_M1_WhiteNoise_R_0p02to50Hz.xml
2024-01-20_2300_H1SUSFC1_M1_WhiteNoise_T_0p02to50Hz.xml
2024-01-20_2300_H1SUSFC1_M1_WhiteNoise_V_0p02to50Hz.xml
2024-01-20_2300_H1SUSFC1_M1_WhiteNoise_Y_0p02to50Hz.xml

The suspensions were set to ALIGNED state after the measurements were complete.

Sun Jan 21 10:05:17 2024 INFO: Fill completed in 5min 13secs

A sputtery fill, TC temps were noisy. Standard and zoomed in trends attached.

As a follow up to my previous log, temperatures in Zone 4 have fallen slightly after a 2 degree change to setpoint with an average space temperature of 69.9F (previously 70.56) but still has HAM7 at ~72F. At this time my plan to is activate two temperature sensors in the peripheral Zone 1. Currently, only two of the 4 sensors are active (1C and 1D) which is providing an inaccurate average as the two inactive (1E and 1F) are hovering around 70. Ideally, the cooling of this neighboring space with a more accurate space average will continue to drive Zone 4 further in the direction we need. As with the previous change, a high-level alarm may trigger for Zone 1 - please disregard.

Monitoring will continue.

T. Guidry

Vicky Daniel

Today we swapped the beamsplitter in the squeezer laser path that transmits a sample beam to the IR PD (which monitors the laser power). The old splitter was 98:2 for p-polarization and transmitted about 0.1% in s-polarization. We replaced it with a 98:2 meant for s-polarization that transmitted just shy of 1%. After a turning mirror, another 50:50 splitter was installed. The transmitted beam is used for the IR PD, whereas the reflected beam passes through a half wave plate, a polarizing beam splitter, a quarter and a half waveplate, and two additional turning mirrors into a fiber coupler. The other end of the fiber was connected to the squeezer laser input of the fiber beat note box. We also moved the fiber PSL sample beam from the table feedthrough to the PSL input of the fiber beat note box. This allowed us to lock the TTFSS with the new setup.

A slight realignment was required for the CLF, seed and SHG paths. The power coupled into these fibers came back to near the values where they were.

The channels H1:SQZ-FIBR_TRANS_DC and H1:SQZ_FIBR_REJECTED_DC are now monitoring the power in the fibers of the PSL and squeezer lasers, respectively.

The squeezer laser has been turned off and locked out again after the work was finished.

Sat Jan 20 10:09:29 2024 INFO: Fill completed in 9min 25secs

TITLE: 01/19 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY:

Not much to report for today, weather conditions prevent a lot of work from happening. The LVEA temperatures seem to be fine now, alog75477

There was a 5.3 from Alaska that came through around 21:40

Rick and I went to EndX to do the PCAL Tx module maintanence yesterday.
We followed Mostly followed the procedure outlined in DCC doc T1600436-v8 which was printed out and attached to the ALOG.
I have also updated the PCALTxMaintenanceLogBook spreadsheet with the latest information from today's activity. This is information is not currently in the DCC.
I will wait until after EX and EY are completed later this week before updating the DCC with the latest spread sheet. The latest information is currently attached to this alog.
Attached a picture of the OLTF taken with the SR785 .

Once upon at time as fellow at LHO, I had the unfortunate responsiblty, with Sudarshan Karki for Pcal, of updating suspension models for various components of Calibration. Link to my Actuation model updates.
This exercise is painful because the existing Matlab code is buggy and required lots of manual fixes to get a working product out the door. At some point I attempted (though ultimately failed at the time) to update all of this to python.
This pain was felt by me again when I needed to do this again, twice, for the new LLO test masses at the start of 2023.

Currently the CalSVN is being shuttered, and lots of data and scripts are being migrated. Being the only one who has updated LIGO (LLO and LHO) suspension models for the calibration group, I'm in charge of the librarianship of where all these scripts I've baked up over the years go: Relevant diagram and technical document.[I'm still updating these 2 documents at the moment]

In doing the librarianship I needed to modernise much of the code. It also dawned on me that this painful suspension model propagation is disgustingly daunting and decided that I should retry my hand at migrating this work to Python.

I am proud to report that I have completed this 4 year old task:

• The code that transforms the simulink state-space models to zpk format lives here: https://git.ligo.org/Calibration/ifo/common/-/tree/main/scripts/SusModelsGen
• And, my magnum opus, the all-in-one susmodel to front end filter code, which encompasses the previous functionality of 4 separate Matlab scripts (2 sites; pcal and all actuation stages), which is now bug and hack free, lives here: https://git.ligo.org/Calibration/ifo/common/-/tree/main/scripts/SusModelToFrontEnd

The new python program generate_fmcs_pv_table.py creates a MEDM which shows all the FMCS EPICS channels in a table. The entries are color coded by subsystem. Entries are sorted alphabetically.

For readability I've removed the H0:FMC- prefix in the channel names.

As described by Patrick, the new code cannot read binary inputs directly. Binary channels are read by analog-input PVs, denoted with an _INP suffix in their name. The (0,1) values are then fed into a binary-input record, which performs the required enumeration to the ZNAM,ONAM strings. On the MEDM screen the intermediate _INP PVs are highlighted with a "^^^" suffix, pointing to the related binary PV located directly above in the table.

The program also generates the DAQ H0EPICS_FMCS.ini file which is read by the EDC.

Today's activities:
- The Annulus volumes of HAM6, HAM7, and GV2 were vented with Nitrogen
- HAM6 X+ and X- doors were taken off
- HAM7 X+ and X- doors were prepared to be taken off tomorrow
- HAM7 RGA electronics was disconnected, the aux cart was removed
- The purge air was checked, its quality was satisfactory, see details in comment
- The staff left early because of the unpleasant weather conditions
So far, everything is going according to plan: https://docs.google.com/spreadsheets/d/1F3Z1cjFrFtaNHayVFVVXruY5JwSiY5-S/edit?usp=sharing&ouid=104962245367404322733&rtpof=true&sd=true

Today's activities:
- Relay tube was vented with Nitrogen; it was also taken off (mitre part stayed, the others came off in 1 single piece)
- RGA scans have been made at HAM7 and HAM6 - they were satisfactory, details later; the OMC RGA is leaking, so no scan there - leak hunting later the week, or next week
- All the RGAs, Cold Cathode gauges, Ion pumps, NEG-pumps were valved out in the volumes to be vented
- The corner was vented first. At the start of the vent, the purge air's dew point was at ~-52 deg C, with 0 particles. The vent was carried out from 2 pm to 6 pm
- HAM7 was vented after. The purge air's dew point was at ~-42 deg C, with 0 particles. This vent was carried out during the corner vent, taken ~1.5 hours
- After the corner vent, GV5 AIP railed: this suggests a leak from the annulus system to the main volume - further investigation is required (history: in the last 3 years this AIP railed 6 times). This Annulus volume is being pumped with an aux cart now during this vent

Rick and I went to the PCAL LAB to do the PCAL Tx module maintanence today.
We followed Mostly followed the procedure outlined in DCC doc T1600436-v8 which was printed out and attached to the ALOG.
I have also updated the PCALTxMaintenanceLogBook spreadsheet with the latest information from today's activity. This is information is not currently in the DCC.
I will wait until after EX and EY are completed later this week before updating the DCC with the latest spread sheet. The latest information Is currently attached to this alog.
Attached a picture of the OLTF taken with the SR785, I will update this with the .gif that the SR785 gave us tomorrow.