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

21:04 UTC back to NLN, I'm going to see how squeezing is doing then go into observing or optimize squeezing then go into observing.

After finishing my 3rd Initial Alignment I went through another round of too small DRMI flashes and the same PRMI locking and the 20Hz buzz killing it over and over again till a lockloss, we lost it at ALIGN_RECYCLING_MIRRORS after this for some reason. For the next attempt I turned down to gains for PRMI, PRCL1 and MICH1 from 6 -> 4 and 2.8 -> 2.6 respectively in lscparams and reloading ISC_DRMI but DRMI was suddenly able to lock after a few seconds and we didn't even go through PRMI. I reverted my gain changes, I have no idea if they would have helped or not, turning the MICH1 gain down from 3.2 to 2.8 did help us to survive longer in PRMI but it still was not enough.

Sat May 18 10:12:26 2024 INFO: Fill completed in 12min 22secs

Still having alignment problems, I wasn't able to finish SRC in IA. PRMI won't stay locked for more than 2 seconds despite ok flashes. I'm thinking of trying to restore the alignment to right before we locked last night or doing another initial alignment.

TITLE: 05/18 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 153Mpc
OUTGOING OPERATOR: Oli
CURRENT ENVIRONMENT:
    SEI_ENV state: SEISMON_ALERT
    Wind: 3mph Gusts, 2mph 5min avg
    Primary useism: 0.05 μm/s
    Secondary useism: 0.08 μm/s
QUICK SUMMARY:

• Lost lock right at 11 hours, at 14:40UTC
• Low wind
• EQ mode activated at 14:50 UTC

TITLE: 05/18 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Observing at 152Mpc
INCOMING OPERATOR: Oli
SHIFT SUMMARY:
Winds and some light earthquakes made for difficult locking but H1 got there.
When we first locked the range was 142-ish Mpc, after about 2 hours of thermalizing and some fiddling with the SQZ_MAN  SCAN ALIGNMENT FDS & SQZ_SCANANG I was able to increase the range to the mid 150's. 

H1 has been locked for 4 and a half hours. and currently Observing.

LOG:
no log

TITLE: 05/18 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Observing at 142Mpc
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 32mph Gusts, 24mph 5min avg
    Primary useism: 0.11 μm/s
    Secondary useism: 0.12 μm/s
QUICK SUMMARY:

After interviening to get better flashes on ALS Y arm
I tried to lock H1 and it failed at getting PRMI locked.
I started an Initial_Alinment.
Initial alignment took a long time to complete likely due to the wind.

Once the locking started H1 made it to Check_ALS_SHUTTERS and a 5.0 Mag Earthquake from the South Sandwhich Island hit and unlocked the IFO.
https://earthquake.usgs.gov/earthquakes/eventpage/us6000mzcb/
This earthquake was not announced on verbals.
Nor was this one https://earthquake.usgs.gov/earthquakes/eventpage/us6000mzcu/executive

After trying to relock and getting stuck in a PRMI loop again I requested another Initial_Alignment while waiting for the R wave to pass.
Relocking took a long time but we got back to OBSERVING at 3:38 UTC

The range isn't great so I started poking around the in the new Low Range Checks.
I have attached plots of diaggui & ndscope described on the ops wiki low range checks AND a picture of the bottom of the SQZr nuc33 .
Since I'm not really sure how these plots would normally look. I have no idea if I should adjust the squeeze angle or not. Everything I have read kinda suggests that perhaps the squeeze angle is fine maybe?

anthony.sanchez@cdsws29: caget H1:SQZ-CLF_REFL_RF6_PHASE_PHASEDEG
H1:SQZ-CLF_REFL_RF6_PHASE_PHASEDEG 212.115

All of these were taken before running the SQZ scan.

The IFO has now been locked for ~ 2 hours. I'm thinking that the perhaps I should try to run the SCAN_ALIGNMENT_FDS to see if better range can be reached.

GRB-SHORT  E484687 Standing down....