TITLE: 09/05 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 151Mpc
INCOMING OPERATOR: Oli
SHIFT SUMMARY: Mostly quiet shift with one lock acquisition early on and observing since. H1 has now been locked for 4 hours.
LOG:

• 23:01 - Starting initial alignment
• 23:21 - Starting lock acquisition
  • 23:33 - Lockloss at DHARD_WFS
• 00:55 - Observing

H1 is back to observing as of 00:55 UTC after a day of commissioning and a lockloss late this afternoon.

After running an alignment, DRMI locked easily, but DRMI ASC pulled things away from good alignment and there was a lockloss during DHARD_WFS. The next attempt needed a run through PRMI, which caught and PRMI ASC worked well. No other issues during the locking process. The only SDF diff I needed to address was the SQZT0 picomotor driver was left on (and is now off).

Yesterday during commissioning, I did some injections on the HAM1 ISI to try to measure the coupling of table motion at that chamber to DARM. Consistent with the multiple logs Elenna has put in the last few days, I don't see much evidence for coupling above 10hz. First 4 attached images show results for the X, Z, RY and RZ dofs. I didn't do Y or RX, I suspect from these results there's not a lot of reason to pursue those, but the each measurement is only 90s and are relatively low risk.

For each injection, I sent a bandpassed (butter("BandPass",8,10,100) in diaggui)  the input of the iso loops, with amplitudes between 2 and 4 (I think 4 would have been fine for all dofs, as far as the IFO was concerned). I then made dtt templates for each excitation dof with spectra for the relevant BLND GS13 dof and CAL_DELTAL, put those filenames and locations in the coupling_plot.py and used the coupling_util.py function attached here, as well as the darm calibration txt. I'm sure these exist somewhere in the svn or something (couldn't find them) but it's taken several days to get this sorted on my own and want half a chance of figuring it out again in the future. I got some help from Huyen, but also used some older copies I had from previous measurements.

TITLE: 09/04 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 153Mpc
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY:

For today...we only observed for 15min--rest of the day was for commissioning (1445 until past 0000utc when H1 gets back to NLN); the 42hr lock ended right after Commissioning started.  (apologies for handing you an unlocked H1, RyanS....but did get to do some locking for the first time in weeks (due to long H1 locks)!).
LOG:

• 1445 6-hr Commissioning begins (later upgraded 8.5hrs)
• 1455 MY CEBEX trip (richard)
• 1506 Lockloss in latter half of 15-min DARM Offset Script for the set-up of OM2 heating.
• 1515-1531 Optics lab clean/checks (nellie)
• 1533 Robert in LVEA for injection set-up.
• 1603 OM2 heating started with 4.6 (per Jennie's instructions and Sheila phoning in that this is something we can try while locking.)
• 1807-1840 MX trip to check on pumps (janos)
• ~1815 C17 cargo plane flew over LHO (Randy heard it outside, Camilla & others felt it in the offices, H1 was at LOW NOISE COIL DRIVERS).  TJ knew about it on an app he has and here's the LINK of the plane.
• Earthquake & Locking Note:  Finally back to NLN at 1823utc.  But for this 2nd locking attempt, we paused at MAX POWER due to an earthquake in Afghanistan---it was originally noted by USGS at M5.6, and we did not worry about it since it was in the green, but it was later upgraded to M6.3 which forced H1 to transition to EQ Mode....so we held at MAX POWER (which is basically, the ASC High Gain state) until the earth calmed down and we went back to "Calm mode".
• 2251 LOCKLOSS
  • For locking, the green arms looked ugly so opted for another alignment.
• 2253-2310 Robert (to unpack his stuff) & Betsy went out to the LVEA.
• 2301  Ran another alignment since Verbal said Green X & Y arms needed to be found by hand!
  • As I was leaving, Ryan noticed that the quickly-locked DRMI then went bad to a bad alignment when the ASC came on....handing this off to RyanS.  :(

TITLE: 09/04 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Commissioning
OUTGOING OPERATOR: Corey
CURRENT ENVIRONMENT:
    SEI_ENV state: SEISMON_ALERT
    Wind: 10mph Gusts, 5mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.08 μm/s
QUICK SUMMARY: H1 has been commissioning pretty much all day, but just had a lockloss at 22:51. H1 is starting an initial alignment now.

• Wind and ground motion low
• All other systems nominal

This morning at 16:03UTC, Corey heated up OM2 by setting H1:AWC-OM2_TSAMS_POWER_SET to 4.6, plot attached.

Sheila, Camilla

• no squeezing time: 20:06-20:11 UTC (ref 19)
• 20:15:17-20:19  UTC FIS demod angle 127.05 (ref 21)
• FIS mid sqz + 20:21:52- 20:25:00 UTC demod angle 144.12 (ref 22)
• FIAS 20:29- 20:32 demod phase 242.73 FIAS demod angle 242, clf servo sign flipped (ref 23)
• 20:36-20:39 FI mid sqz other side, CLF servo sign -, demod angle 110.39 (ref 24)
• 20:40:30 - 20:43:30 mean sqz, ADF off (ref 25)
• 20:48:30 - 20:51:30 FDS demod angle 121.63 tuned for High Freq (ref 26)
• 20:54:30 - 20:57:30 FDS demod angle 137.75 tuned for 200Hz  at same time as Robert's sweep (ref 27)

Camilla then noticed that my angle tuning for FDS above wasn't very good, so she repeated that. 86737

Took above data at NLG of 24.0, measaured a few hours ago 86729.

at 19:25:38-19:56:30 UTC we went to no sqz with OM2 hot.

There was a 29Hz peak injected by Robert, and this was 1 hour 30 minutes after power up.

In this alog, I showed a plot that compares the CHARD P and INP1 P noise before and after the HAM1 ISI install. Last night, I took the measured CHARD P coupling function and calculated the CHARD P contribution to DARM just before the vent to install the HAM1 ISI, and from a high range time this past weekend, with the HAM1 ISI installed. The attached plot compares DARM before and after the vent and the CHARD P contribution to DARM before and after the vent.

Turns out the change in CHARD noise may have actually directly reduced some noise in DARM. The DARM/CHARD coupling function remained the same before and after the vent, so the improvement is directly due to the reduction of noise in CHARD.

We were running HAM1 feedforward to the pitch ASC before the install, but it varied in performance. My plot in the linked alog shows the best performance achieved, but looking at the data closer to the vent, the noise in CHARD P may have been higher than the best performance I show in the linked alog above.

The low frequency noise in DARM has also changed for other reasons:

• DHARD is now on two sensors, reducing the DHARD noise by rt2 (85774)
• MICH ASC has better low pass filters engaged (85893)
• CSOFT P has better low pass filters engaged (85823)
• Improved LSC feedforward (86481, 86370, 86423)
• PEM team sourced and reduced some large peaks (86257)

Closes FAMIS#37256, last checked 86348

ndscope

Things to note:
Possible issues:
CS_DUST_LAB1_{300,500}NM both stalled at a value 16 days ago
CS_DUST_DR1_300NM has been at zero for the past four days
CS_DUST_DR1_500NM has been at zero for the past six days

Not an issue:
CS_DUST_LVEA5_300NM has been at 0 for three months - since we turned it off after the vent
CS_DUST_LAB2_{300,500}NM both off as expected (comparing to last month when Ryan C didn't mention it as an issue)

Thu Sep 04 10:05:52 2025 INFO: Fill completed in 5min 48secs

Gerardo confirmed a good fill curbside.

15:59:33 Wed 03sep2025 PDT power glitch. H1 was in lock throughout and no impact on range.

H1 lockloss a few after hitting the 42hr mark for a lock (42hrs03min).  At this time we were in at the beginning of 6hr commissioning period and at the time of the lockloss we were about ~10min into running the DARM Offset script for OM2 heating set-up.

FAMIS 28464, last checked in alog86272

Nothing much out of the ordinary here that I can see aside from the fact that the ITMX SLED is getting awfully close to the 1mW lower power threshold and will likely hit it in the next month.