Fri Nov 14 10:13:11 2025 INFO: Fill completed in 13min 7secs

Jordan confirmed a good fill curbside.

In 88046 the OFI temperature slowly scanned while we were in observing, we lost lock while the temperature was still scanning but we got through the minimum of power sent to HAM7.  

The first attachement shows the time series.  The second shows that the AS power drifted during the test but the ratio of OFI PD A (pick off of TFP reflection towards HAM7) to AS_C (power into HAM6) shows the OFI temperature dependence nicely. 

In the third attachment, the blue dots are averages of the last 10 minutes at each OFI temperature.  This is fit to a model for the constant leakage, temperature coefficient and temperature that minimizes leakage: leakage ratio =  constant_leakage + 1* sin^2(  (pi /180 )* angle_coefficent * (temp - best_temp)

The impact of the misrotation of the OFI is sitting on top of 0.34% constant leakage that doesn't change with OFI temperture, presumably the reflection of the thin film polarizer.  The OFI seems to rotate the polarization by 0.12 degrees of rotation per degrees C, which can be compared to the estimate of 0.2 deg / deg C from 57965.  

Closes FAMIS#27828, last checked 87799

TCSX Chiller read 30.5, TCSY read 10.5, so I did not add any water. Filters and water flow looks good, and there is no water in the Dixie Leak Detector™

We had a couple of HAM1 vacuum glitches yesterday evening (Thursday 13th November 2025) at 18:24 and 22:24 PST. The first glitch caused a VACSTAT alarm because its slope just exceeded the 1.0e-09 torr/min trip level, the second did not reach this level. 

These both look like sensor glitches (not gas releases), the pressure is a square wave with no pumpdown curve.

I restarted VACSTAT at 20:44, roughly at the mid point between the glitches, to clear the alarm.

TITLE: 11/14 Eve Shift: 0030-0600 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Microseism
OUTGOING OPERATOR: Anthony S.
CURRENT ENVIRONMENT:
    SEI_ENV state: USEISM
    Wind: 15mph Gusts, 11mph 3min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.81 μm/s  (peak 1.349 um/sec)
QUICK SUMMARY:

• We've been down all night/morning (OWL report, EVE report)
•  Microseism looks to be on the decline over the past 18hours
  • I'm going to attempt to relock
• The winds is moderate
• The IMC has been unlocked and trying to relock since 12:44 UTC
  • Its stalled, probably due to ISC_LOCK's IDLE not having any requests

TITLE: 11/14 Owl Shift: 0600-1530 UTC (2200-0730 PST), all times posted in UTC
STATE of H1: Microseism
OUTGOING OPERATOR: Ibrahim
CURRENT ENVIRONMENT:
    SEI_ENV state: USEISM
    Wind: 5mph Gusts, 3mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.86 μm/s 
QUICK SUMMARY:
Eve shift had left the IFO in Idle to wait out the higher useism.
I woke up at 2am to see if the useism was low enough to lock since it was falling. 
H1 went through an Initial Alignment before trying to lock, which took longer than expected locking the green Arms. 
Once that was done I allowed DRMI to try to lock a handfull of times. I think when it fails this time I will leave it in idle and try again in a few more hours. 

TITLE: 11/14 Eve Shift: 0030-0600 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Microseism
INCOMING OPERATOR: Tony
SHIFT SUMMARY: Another shift of no observing time for H1 due to the high microseismic motion. Tony will check on things overnight to see if conditions improve, and I've re-enabled sensor correction in case he decides to give locking a try.

TITLE: 11/14 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Microseism
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY: In IDLE and not currently trying to relock due to the high secondary microseism. Really nothing happened all day besides some opportunistic commissioning and out of lock work.
LOG:

15:30UTC In DOWN due to very high secondary microseism
    - Decided to run an initial alignment just for fun
        - Issue with FSS oscillation
    16:47 Decided to take the ifo to IDLE from ACQUIRE_DRMI since it wasn't catching and we wanted to do some out of lock commissioning                                                                                                                                                                   

TITLE: 11/14 Eve Shift: 0030-0600 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Microseism
OUTGOING OPERATOR: Oli
CURRENT ENVIRONMENT:
    SEI_ENV state: MAINTENANCE
    Wind: 3mph Gusts, 1mph 3min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 1.22 μm/s 
QUICK SUMMARY: H1 has not been locked all day due to the very elevated microseismic motion and is currently holding in IDLE. If I see it come down enough, I'll try to have H1 lock, but I don't think this is forecasted to get better any time soon.

• Wind low, microseism very high
• All other systems nominal

Ibrahim, Betsy

BBSS Eliptical Baffles (D2500293) were successfully installed today. Pictures from various angles are attached.

Problems - graphics regarding these are attached as slide screenshots

• D2000483 Type 2 - 12 O'Clock Baffle Brace
  • LHO did not recieve coated parts for this*, but it does not seem like this part is visible due to the baffle itself.
    • Note*: LHO recieved one coated part weeks after ours had gone into C&B so wasn't part of same set/load - either way missing one coated.
  • This part is extremely difficult to install due to poor sighting and no room. The screw that fastens this part has to be installed from behind the figure 8, where there isn't even enough room to fit the width of a 9/64 allen wrench. A combination of tweezers, wrenches, bent T-wrenches were used and we finally got it in. However, we could not tighten much in the case of the back.
  • Potential Fix: The sides of that thru hole have free thru holes that could fit another bracket instead of the 12 O'Clock one (~11 and ~1 O'Clock).
• D2000483 Type 1 - 6 O'Clock Baffle Brace
  • Helicoil call-out is incorrectly 1/4-20 X 1.5D but using those results in the helicoils bottoming out and appearing proud. So, removed and used 1D instead - it works. Will redline
• D1900594 V10 Mounting Bracket
  • 2 of these were too long to fit into its recessed spot in the Lower Structure, which seemed like a machining issue (barely 0.2 mm if I had to guess). To fix this, betsy and I filed off the problem surfaces until they fit. The filed surface is a mating surface and we used a clean-file.
  • Part incorrectly called a wire baffle - will edit DCC and redline

Remarks: I added one of those coated screw caps to the Y-Brace (D1900589) strut fasteners since I could see it shining in the head on picture. Comparison pictures for this are below.

M. Todd

From some of the modeling I've been doing, I've come up with a slew of estimates for coupling factors of TCS power settings to substrate and surface defocus. I've put them into TCS and SDF'd them, hoping that the next week or two we get some good confirmation of these numbers.

Thu Nov 13 10:13:43 2025 INFO: Fill completed in 13min 39secs

Gerardo confirmed a good fill curbside.

[Joan-Rene Merou, Alicia Calafat, Sheila Dwyer, Jenne Driggers]

We have entered the LVEA and went to the Beer garden. There, we first turned off the Low Voltage ITM ESD Driver D1600092, first the 15V switch and then the medium voltage switch. In order to turn it on again, it should be reconnected in the opposite order. With the voltage request set to 0 and chassis powered off, we have unplugged the SHV cables going to the chamber and plugged into Robert's ground boxes, which we used to ground to the rack which is grounded to the chamber. This has been done at both drivers (See attached photos).

Afterwards, we have changed the code at /opt/rtcds/userapps/release/isc/h1/guardian/ISC_LOCK.py in order that the LOWNOISE_COIL_DRIVERS will go to LOWNOISE_ESD_ETMY instead of TRANSITION_FROM_ETMX. This has been done by changing lines 6670 and 6674, moving the ", 15" step from line 6670 to 6674. Finally, we communicated the change to the operator and loaded the guardian.

M. Todd, S. Dwyer

We wanted to get a couple of measurements of the OMC mismatch with the SQZ beam when we changed from the nominal setting for only one of the ZMs at a time. OM2 was cold for all of these measurements.

It seems the ZM4 is not a very strong actuator for changing the mode at the OMC.

During PRC Align, IMC unlocked and couldn't relock due to the FSS oscillating a lot - PZT MON was showing it moving all over the place, and I couldn't even take the IMC to OFFLILNE or DOWN due to the PSL ready check failing. To try and fix the oscillation issue, I turned off the autolock for the Loop Automation on the FSS screen, and after a few seconds re-enabled the autolocking, and then we were able to go to DOWN fine, and then I was able to relock the IMC.

TJ said this has happened to him and to a couple other operators recently.

TITLE: 11/13 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Microseism
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
    SEI_ENV state: USEISM
    Wind: 3mph Gusts, 0mph 3min avg
    Primary useism: 0.05 μm/s
    Secondary useism: 1.22 μm/s 
QUICK SUMMARY:

Currently in DOWN due to excessively high secondary microseism. We're supposed to have calibration measurements and commissioning today. I'll try for a bit to get us back up, but I doubt we'll get past DRMI since it's worse now than it was last night for Ryan or TJ

J. Kissel, C. Gray, M. Nakano, G. Billingsley

We're getting started with cleaning our 1" and 2" optics for SPI. Corey uploaded *all* of our optics (50:50 BSs, 85:15 BSs, TFPs, HR mirrors, Lenses etc.) to ICS in prep, and I reviewed the work double checking that the ICS record information makes sense. For the HR mirrors, which were part of the 2025 large custom purchase order (C2500044) from FiveNine Optics (to be used by JAC, SQZ, the LLO TNT Lab, and SPI), he entered them into ICS with a key that used the DCC number that's physically etched into the barrel of the optic.

HOWEVER -- the DCC number etched on the barrel of the optic is E1900393 -- E1900393. See attached picture. 

That drawing number is for the coating spec of 0-25 deg AOI HR mirrors.

The physical coating spec we want, was provided, and bought was for 45 deg AOI, i.e. E1900392 -- E1900392 (one DCC number lower).

So these HR optics, coated with E1900392 spec, bought with C2500044, which have vendor run numbers 1895 and 1897, have the incorrect DCC number for the spec etched on the barrel.

If you head to the purchase order, C2500044, and look at the FNO_4787-1.pdf attachment, it clearly states (twice!)
    "[...] per drawing E1900392-V2. Serialization per E1900392-V2."

However, if you then *read* E1900392-v2, section 8 states equally clearly
    "Each optic should be serialized and marked with the following code/description:
        1" optics: E1900393-v2-01 S/N:01 HR1064+532
            with incremental S/N: 01, 02, 03, ...
        2" optics: E1900393-v2-02 S/N:01 HR1064+532
            with incremental S/N: 01, 02, 03, ..."

Thankfully we know the coating is the correct E1900392 coating --
(1) The PCAL team confirms via measurement at 45 deg AOI, that these have transmission at the level of ~5e-5 W/W, so these will serve excellently as HR mirrors at 45 deg AOI. See LHO:86699
(2) The vendor's data, posted to C2500186, (Even though the run numbers listed on the first page of the data for the First Batch are quoted as "V2-2895" and "V2-1897" we know the run numbers are V2-1895 and 1897 from what's written on the containers the optics came in; see attached picture) show figures with captions indicating the data is from AoIs of 38, 45, and 50 deg, a reasonable range of AoI's to test for a 45 deg AoI mirror; and conversely no measurement of anything at AoIs less than 25 deg, which would be what one would report for a coating that's spec'd with the *actual* E1900393 spec.
(3) The E1900392 spec specificies a 45 deg AoI.

So, now we just have to figure out how to keep track of this information when we're in the lab / in the chamber, 5 years later, and the optics are no where near their cases and a brand new person is using the optics. C'est le vie!