TITLE: 05/19 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Tony
SHIFT SUMMARY: More progress than yesterday in terms of the PRMI oscillation as I seem to have solved it for now by adjusting loop gains and ramps and can hold it locked, then I was back to DRMI not being able to lock but after Sheila restored PR3 to a previous spot we were able to lock DRMI no problem. Currently a few minutes away from NLN

15:00 UTC Initial Alignment as there weren't really any flashes on PRMI

After some more fiddling with gains/ramp times and talking to Sheila I was able to stop the PRMI 20ish Hz buzz by reducing PRMI-MICH to 2.2 from 2.8 and increasing PRMI_PRCL to 8 from 6 and set the ramp time sof both to 5 alog77928

20:25 UTC - No matter how much adjusting I did with the sliders (BS, PRM, SRM) I couldn't get AS AIR looking good enough so I thought there must be an alignment issue somewhere after a few mores tries I dropped to do another Initial Alignment, after this I still had DRMI issues.

I further decreased the gain of PRMI-MICH to 2.0 after Sheila looked at my OLG measurement, PRMI locked pretty easily after this. We're not sure why my PRCL OLG measurement looked the way it did alog77929

22:35 UTC Sheila adjusted PR3 to where it used to be, after which I did another Initial Alignment so we could try locking PRMI. I may need to revert my PRMI loop changes? I have not reverted them as of now

After finishing IA we locked DRMI immediately

There were a lot of IFO_OUT saturations during POWER_25W and MOVE_STOPS

After Ryan was able to lock PRMI by adjusting both the MICH and PRCL gains (77926) , he mentioned to me that the build ups didn't look good.  Indeed, POP18 was around 26 counts after PRMI ASC ran, before our PR3 moves this week it would be around 50 counts in PRMI.  I looked back and it hasn't been 50 since I put PR3 back on Friday.  I was able to walk PR2, PRM and BS to improve the build up a little, but decided to move PR3.  We did this at LOCKING_ARM_GREEN, and saw that putting PR3 back according to the slider values (rather than top mass osems), did improve the COMM beatnote from around -10 to around 0dBm. 

Ryan is going to run an initial alignment skipping the green arms, and try to relock PRMI.  Then we will see if this PR3 move solves the low POP18 power, if the PRMI gain changes can be reverted. 

Also note that Ryan posted a PRCL UGF measurement that seems very strange. 

I spent a bit trying to align everything by hand with ISC_LOCK paused in DRMI, misaligning PRM and SRM to adjust the BS then aligning PRM to adjust it then SRM. Still the same behaviour on PRMI as yesterday even with turning down the MICH and PRCL gains, and despite good flashes on DRMI it wasn't able to lock after my adjustments, I had to move SRM a lot. The wind is also picking up which is not helping ALS.

Sun May 19 10:09:59 2024 INFO: Fill completed in 9min 56secs

TITLE: 05/19 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Oli
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 5mph Gusts, 2mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.07 μm/s
QUICK SUMMARY:

• We're still not able to get past PRMI, the detector is still down
• Wind has died down
• I'm probably going to call for help soon

Tony and I have been troubleshooting the relocking issues since 08:00UTC, and have had no luck. We have been stuck not able to get past ACQUIRE_PRMI due to the ~10-30Hz wiggle that starts a few seconds into PRMI catching. So far:

08:05 Got on to Tony trying to lock the ifo but having trouble getting past PRMI

08:29 Took us to DOWN to revert to previous alignment values that Ryan C used earlier (1400036418 aka 05/18/24 03:00 UTC)

08:30 Started an Initial Alignment

08:55 Initial Alignment finished
    - lscparams:
        - PRMI_MICH W_ALS changed 3.2 -> 2.6 and NO_ARMS changed 2.8 -> 2.6 (didn't help)
        - PRMI_PRCL W_ALS changed 6 -> 2 (didn't help)
    - ISC_LOCK and ISC_DRMI reloaded, starting relocking
- Couldn't get DRMI, went straight down to MICH instead of trying PRMI first
- Couldn't get PRMI to lock for more than ~3 seconds, then we get the wiggle between 10 and 30 Hz and lose it

09:47 Earthquake mode activated due to incoming earthquake from Alaska
10:33 Ground mostly settled after earthquake

The oscillations seem to start a couple of seconds after getting PRMI, right before ISC_DRMI's PRMI_LOCKED gets into .run. We wanted to see if it was related to the ramp times and/or value changes happening at the same time, so we have increased the gain ramp times for lines 518 (LSC_MICH1) and 519 (LSC_PRCL1) in ISC_DRMI from 2 to 4 seconds for each, and if that doesn't work I'll be adding in timers between these lines and around the other value changes and gain ramps between those lines and the end of PRMI_LOCKED .main in ISC_DRMI.

TITLE: 05/19 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Oli
SHIFT SUMMARY:
Lockloss @ 2:37 UTC
https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1400121463
I'm fairly confident that a strong wind gust may have unlocked us.

5.5 Mag Earthquake from the top of the world: https://earthquake.usgs.gov/earthquakes/eventpage/us6000mzkf/

I'm Having a reall dificult time getting DRMI & PRMI to lock for some reason. very similar to Ryan's Alog:
https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=77906
Touched the beam splitter a nudge in a few directions to try and lock PRMI.

Check mich fringes is also saying the Beam splitter too far misaligned!

This seems like just a bad alignment and may be related to the fact that the Last Initial Alignment, was done during an earthquake.

GRB-Short E484987

Took alignment back to GPS time: 1400035904 ( the tail end of Initial Alignment before the last good long lock stretch.)

Can now certainly rule out bad alignment. Took PRMI-MICH to 2.6 and the PRMI lock lasts a little longer but still ultimately doesnt stay locked.

I'm now trying the PRMI-PRCL at 4 like Ryan suggested. As I too am seeing the PRMI 20 Hz wiggle Ryan was speaking about.

GRB-Short E484996

I tried to Manual ISC lock through PRMI to test diffent settings so see if they would actually lock PRMI for any longer. I cannot keep PRMI Locked for more than 3 seconds.

Trending PRM Slide values I see that pitch is higher by 11ish  and Yaw is higher by 3 ish since the last long lock.

TITLE: 05/19 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Observing at 150Mpc
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 22mph Gusts, 19mph 5min avg
    Primary useism: 0.12 μm/s
    Secondary useism: 0.10 μm/s
QUICK SUMMARY:

Took the IMC OFFLINE

heading to the CER> HAM3 ISI Interface chassis, on the back of those 2 chassis , power cycling both the interface chassis.  

After Power cycling and getting approval from Jim I starting relocking, which was failing to get past PRMI. I then did an Initial_ALignment. This is when an earthquake struck.
https://earthquake.usgs.gov/earthquakes/eventpage/us6000mzjx/

Initial Alignment did finish. I waited a few minutes for the peak of the earthquake to go down before starting to lock again.
Locking went well after this, even with wind speed rising and earthquakin.

Observing Reached @ 1:45 UTC

We are now Locked and in Observing, Range is slight low though, once thermalized I'll do a SQZ Scan. 

TITLE: 05/18 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Ryan C
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 15mph Gusts, 11mph 5min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.08 μm/s
QUICK SUMMARY:

Relocking the IFO,  After HAM3 SEI ISI Watchdog tripped. Wind is starting to kinda
2 more ISI Watch dog trips while relocking.
I have called Jim to help troubleshoot this issue, and Holding in IDLE until I can get a green light from Jim.

TITLE: 05/18 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 152Mpc
INCOMING OPERATOR: Tony
SHIFT SUMMARY: Lost lock at the end of the shift, DRMI alignment issues and PRMI was plagued by a ~20Hz buzz that kept killing it after 2 seconds, the mode cleaner was slow to lock in each attempt today. After the 3rd IA DRMI was finally in the mood to lock and I didn't have to go through PRMI and I returned to Observing at 21:15UTC. I was not able to take the calibration measurement this afternoon as planned.

15:25 UTC HAM3 ISI CPS trip while doing green arms in IA. I could not finish SRC align, as SRM was continually saturating. There was also a couple of IY saturations, and there was an earthquake shaking everything at the time.

16:02 UTC HAM3 ISI CPS trip during FIND_IR? I couldn't get PRMI to stay locked for more than 2 seconds.

17:00 UTC I restored the alignments to 05/18/24 03:00 UTC which was right before we locked last night for the 11 hour lock. After locking ALS I could immediately see the beatnotes were better, but DRMI only had small flashes. A few rounds of CHECK_MICH and still bad flashes, 13:31 I started a 2nd IA skipping GREEN_ARMs, there were no saturations during this IA and I was able to finish SRC_ALIGN.

I'm still not able to get PRMI to stay locked for more than 2 seconds, theres a 20ish Hz oscillation that kills it when the MICH1 filter is ramped on? I tried lowering the PRMI-MICH gain from 3.2 to 2.8 in lscparams as Sheila suggested the other day. It lasted longer but was still ultimately killed by the 20Hz buzzing, I lowered it more to 2.6 and it lasted even longer but was killed when PRCL1 turned on? AS AIR was still clearly misaligned so I went through CHECK_MICH which made things worse?  I now had worse PRMI flashes and still a clearly misaligned AS AIR. During this I was also trying to help adjust PRM/BS while in PRMI to fix AS AIR.

19:37UTC After some more seemingly fruitless adjusting of PRM and BS I started a 3rd IA... it looks centered on AS-AS_C during SRC and PRC alignment?

Same behavior as before, bad DRMI then PRMI gets killed after a few seconds from the 20Hz, its also always right after the BS_M1_L filter is turned on. Lockloss after a few rounds of PRMI.

For the next attempt I tried turning down the PRMI-PRCL gain from 6 to 4 but then it was able to lock DRMI all of a sudden and we didn't even go through PRMI... so I'll revert these changes. I have no idea whats different this attempt from the last or why it decided now it wants to work but I'll take it. The alignment was just finally good enough, even though it wasn't on the first attempt after the IA finished?

21:15 UTC back to Observing

23:21 UTC lockloss from a HAM3 ISI trip, same as before, CPS sensor tagging SEI