TITLE: 06/03 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Wind
OUTGOING OPERATOR: Oli
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 29mph Gusts, 21mph 5min avg
    Primary useism: 0.06 μm/s
    Secondary useism: 0.21 μm/s 
QUICK SUMMARY:

• High winds have made relocking a struggle, we haven't been able to make it past 5W in POWER_10W
  • The wind is forecasted to calm down around 05:00 - 06:00  UTC, 10 - 11 pm local  
• 0.03 - 0.1 & 0-1 - 0.3 are both elevated

With the difficulties locking, I tried changing some of the CPS diff filters to get the end station ISI to follow the corner ISI. The CPS diff uses a band pass filter to reduce the differential motion between the ISI, but this filter can inject motion at the microseism. Microseism is low, I'm guessing the arms are struggling more with the below .1hz motion. In the attached image the filters we had been using, are the red trace, blue is what I switched to. It kind of seemed to help, but I think we lost lock after I left the room. I'll leave this running for now, going to try a couple other things.

Sheila, Jennie W

Sheila and Annamaria realised we have a noise bump around 17.75 Hz and hypothesised it could be the bounce mode of the beamsplitter which we have not retuned since adding the BRD (bounce-roll mode dampers) on the beamsplitter.

The LSC-MICH loop feeds back to the beamsplitter.

The measurement of the MICH loop is shown in this plot where it has a UGP 5.87Hz and phase margin of 35.5 degrees.

Code was adapted from Sheila's in this alog and is saved in /ligo/home/jennifer.wright/Documents/Filter_Design/plot_noise_OLG.py - although we are not sure if uncertainty estimates are accurate and the measurement is low coherence below 6Hz (near the UGP).

Sheila looked through the guardian and realised that we don't use FM8 in locking so we will overwrite the 15Hz notch here. Therte is an existing BRD bandpass in FM10 with this shape, which is used in locking, we don't want to overwrite this at the moment but we might once we test the new filter.

I copied over the FM10 filter to FM8 and then made it a bit wider to match the width of the bounce mode in the DARM spectrum found in this measurement from the 8th May.

The new filter is here and has this shape. We made it always on with a ramp of 4s and it is called BR0604.

I reloaded the LSC model coefficients (twice because I forgot to change the filter name the first time).

We will not test it till our next commissioning period.

Wind is above 40mph and we are trying to relock. We were able to make it up to POWER_10W a bit ago but then lost lock.

R. Short, J. Oberling

While H1 was down this morning from wind, we took the opportunity to touch up PMC alignment and recalibrate the rotation stage. With the ISS off, we used the two picomotor-controlled mirrors to increase PMC TRANS from 106.0W to 106.2W and decrease PMC REFL from 21.4W to 20.9W. Not much of an improvement here, unfortunately, so we think this lines up with our theory of increased loss in the PMC cavity (discussed in alog78093). We're now starting to think about swapping the PMC with our fresh spare during a future maintenance period, especially if we see this loss getting worse, but no plan is currently set for that just yet.

After turning the ISS back on, I proceeded to recalibrate the rotation stage since the output from the PMC has changed a couple of times in the past week with our alignment changes. Calibration curve, SDF screenshot accepting new values, and text file from the process are attached.

WP 11895
algo 78132

Found loose connection inside RS485 breakout box located between BSC1 and BSC8. Dave confirmed PSL monitors are back online. Software might need to be restarted as some units are showing incorrect time.

Mon Jun 03 10:09:43 2024 INFO: Fill completed in 9min 39secs

Gerardo confirmed a good fill curbside.

We aren't able to get back up right now due to high winds that are supposed to continue all day (currently >35mph but has already gone up to ~45mph). So we're going to be holding in DOWN until the wind calms down (windy.com says 3:00 UTC but we'll hope for earlier).

We're taking this as an opportunity to do some tasks that require the ifo to be down that would otherwise be done during tomorrow's maintainance.

FAMIS 20031

The main event from this past week was our incursion to investigate PMC losses (alog78093). PMC REFL is still high, but after our work it seems there was a jump up of about 1.3W. We believe this is due to some alignment shift into the PMC (likely from drag wiping M11 and having the environmental controls on for a couple of hours) evidenced by the change in the PMC REFL spot on the camera. Tomorrow during maintenance I plan on tweaking the alignment with the picos to hopefully bring it back to a more reasonable level.

Interestingly, there also appears to have been a change in the outputs of the NPRO and the diodes in both amplifiers at the time of our work in the enclosure. While the overall power output of the NPRO and amps are largely unchanged, I find this interesting as nothing was done with any of these components (shutters, pump current, etc.) except for the power watchdogs being turned off temporarily. Perhaps this behavior is simply a result of the environmentals being slightly different while working in the enclosure.

Monthly FAMIS Check (#26490)

Note:  This is my first time I have run the scripts for these in O4. So I opened up the scripts to make sure there were no excitations to bump H1 out of Observing.  Probably complete coincidence, but when I opened the T240 script via gedit, H1 had a lockloss! (I had Verbal running at the time on NoMachine session.)  I'm sure it wasn't me, but just making a note.  :)

T240 Centering Script Output:

Averaging Mass Centering channels for 10 [sec] ...
2024-06-03 08:44:03.268450

There are 15 T240 proof masses out of range ( > 0.3 [V] )!
ETMX T240 2 DOF X/U = -0.461 [V]
ETMX T240 2 DOF Y/V = -0.33 [V]
ETMX T240 2 DOF Z/W = -0.395 [V]
ITMX T240 1 DOF X/U = -1.271 [V]
ITMX T240 1 DOF Y/V = 0.346 [V]
ITMX T240 1 DOF Z/W = 0.453 [V]
ITMX T240 3 DOF X/U = -1.315 [V]
ITMY T240 3 DOF X/U = -0.597 [V]
ITMY T240 3 DOF Z/W = -1.671 [V]
BS T240 1 DOF Y/V = -0.363 [V]
BS T240 3 DOF Y/V = -0.311 [V]
BS T240 3 DOF Z/W = -0.454 [V]
HAM8 1 DOF X/U = -0.332 [V]
HAM8 1 DOF Y/V = -0.427 [V]
HAM8 1 DOF Z/W = -0.706 [V]

All other proof masses are within range ( < 0.3 [V] ):
ETMX T240 1 DOF X/U = -0.113 [V]
ETMX T240 1 DOF Y/V = -0.078 [V]
ETMX T240 1 DOF Z/W = -0.123 [V]
ETMX T240 3 DOF X/U = -0.067 [V]
ETMX T240 3 DOF Y/V = -0.202 [V]
ETMX T240 3 DOF Z/W = -0.065 [V]
ETMY T240 1 DOF X/U = 0.062 [V]
ETMY T240 1 DOF Y/V = 0.094 [V]
ETMY T240 1 DOF Z/W = 0.164 [V]
ETMY T240 2 DOF X/U = -0.09 [V]
ETMY T240 2 DOF Y/V = 0.165 [V]
ETMY T240 2 DOF Z/W = 0.08 [V]
ETMY T240 3 DOF X/U = 0.178 [V]
ETMY T240 3 DOF Y/V = 0.087 [V]
ETMY T240 3 DOF Z/W = 0.101 [V]
ITMX T240 2 DOF X/U = 0.151 [V]
ITMX T240 2 DOF Y/V = 0.256 [V]
ITMX T240 2 DOF Z/W = 0.248 [V]
ITMX T240 3 DOF Y/V = 0.149 [V]
ITMX T240 3 DOF Z/W = 0.136 [V]
ITMY T240 1 DOF X/U = 0.084 [V]
ITMY T240 1 DOF Y/V = 0.1 [V]
ITMY T240 1 DOF Z/W = 0.005 [V]
ITMY T240 2 DOF X/U = 0.07 [V]
ITMY T240 2 DOF Y/V = 0.237 [V]
ITMY T240 2 DOF Z/W = 0.091 [V]
ITMY T240 3 DOF Y/V = 0.063 [V]
BS T240 1 DOF X/U = -0.165 [V]
BS T240 1 DOF Z/W = 0.132 [V]
BS T240 2 DOF X/U = -0.067 [V]
BS T240 2 DOF Y/V = 0.05 [V]
BS T240 2 DOF Z/W = -0.113 [V]
BS T240 3 DOF X/U = -0.156 [V]
Assessment complete.

STS Centering Script Output:

Averaging Mass Centering channels for 10 [sec] ...

2024-06-03 09:03:13.267069
There are 2 STS proof masses out of range ( > 2.0 [V] )!
STS EY DOF X/U = -4.047 [V]
STS EY DOF Z/W = 2.792 [V]

All other proof masses are within range ( < 2.0 [V] ):
STS A DOF X/U = -0.496 [V]
STS A DOF Y/V = -0.709 [V]
STS A DOF Z/W = -0.681 [V]
STS B DOF X/U = 0.376 [V]
STS B DOF Y/V = 0.958 [V]
STS B DOF Z/W = -0.456 [V]
STS C DOF X/U = -0.655 [V]
STS C DOF Y/V = 0.886 [V]
STS C DOF Z/W = 0.356 [V]
STS EX DOF X/U = -0.06 [V]
STS EX DOF Y/V = 0.011 [V]
STS EX DOF Z/W = 0.051 [V]
STS EY DOF Y/V = 0.048 [V]
STS FC DOF X/U = 0.244 [V]
STS FC DOF Y/V = -1.03 [V]
STS FC DOF Z/W = 0.667 [V]

Assessment complete.

Lockloss @ 06/03 15:29 UTC, probably due to wind or a small local earthquake (or both)

TITLE: 06/03 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 149Mpc
OUTGOING OPERATOR: Tony
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 16mph Gusts, 12mph 5min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.13 μm/s
QUICK SUMMARY:

Detector Observing and Locked for almost 6 hours. Highest winds are currently just above 20mph, but are supposed to get a lot higher today.

TITLE: 06/03 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Earthquake
INCOMING OPERATOR: Tony
SHIFT SUMMARY: Wind and microseism have been increasing over the past few hours which is giving ALS some trouble on the relock. We're still relocking following the LL

Started locking with an IA, which ended up tripping SRM M3

01:02 UTC lockloss

02:03 back into Observing

07:17 lockloss from a 5.9 in the Atlantic

Lockloss from an earthquake, https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1401434227

https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1401411781

Andrei, Sheila

We've analyzed the time-traces of the effective range (H1:CDS-SENSMON_CAL_SNSW_EFFECTIVE_RANGE_MPC) along with the alignment channels FC_WFC_A(B) and AS_A(B)_RF42 (see attached figures). We found no observable dependance between those.

Minhyo

Tried move the beam on OMC QPD using single bounce beam (ITMX misaligned). Changed OM3 PIT & YAW from 18:04:45 UTC (gps: 1398534729).
- Tried same task with OM3, with turning off ASC centering, OMC centering, started new from 18:21:00 UTC (gps: 1398536470).
 

After finishing with OMC QPD, reverted all settings with OM3 and then moved to OM2.
- Moved OM2 PIT&YAW to check ASC-AS_A & B. Finished at 18:35:00 UTC (gps: 1398537318)

Same job was done (moving OM3 -> OM2) with SQZ beam on OMC (from 20:12:05 UTC to 20:24:00 UTC, gps:1398543158-1398543858)

Screenshots (ndscope) are: 1) Measurement with single bounce beam, 2) Measurement with SQZ beam