When looking over flows and temperatures at the LVEA, I noticed that the supply of AHU 2 was low and Supply Fan 4 was manually disabled. The most likely cause of this is from our quarterly lubrication which took place last week and the fan most likely never got brought back up. I physically visited the fan to verify it was all-clear and brought it back into service.

T. Guidry

Ibrahim, TJ, Camilla, Naoki,

Looking at how the ZM4,5,6 alignment has shifted both with the vent and recent temperature changes in the LVEA.

Attached is ZM4/5 P/Y alignment since the last time we were SQZing to vented now,  there is large changes of ZM5 (470urad in Pit and 230urad in Yaw). Alignment sliders haven't changed but SQZ ASC would have been changing some alignment when the IFO was locked.

ZM6 has large changes (1300urad in Pit and 280urad in Yaw). Currently DAMPED but alignment sliders are the same. Edit: DAMPED turns off the alignment sliders, once Austin brought back to ALIGNED it had moved <100urad.

We expect some changes from bouyancy of air. The HAM7 SUS are currently  "aligned" with the doors being taken off HAM7. Jim hasn't locked the ISI yet. Looking at ZM4,5,6 alignment, last vent, IFO locked, and now.

Ibrahim is looking at temperatures and alignment since our last vent.

Mon Jan 22 10:04:41 2024 INFO: Fill completed in 4min 37secs

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

Procedure M1300464

The following high voltage power supplies/electronics were powered off in preparation for the corner vent.

1. CER Mezzanine - ESD HV
2. CER Mezzanine - Fast Shutter
3. CER Mezzanine - OMC PZT
4. CER - SR3 and ITM heaters
5. LVEA - Fast Shutter Driver Chassis - Disabled and powered off
6. MER Mezzanine - HAM7 PSAMS
7. MER Mezzanine - HAM7 Piezo