FAMIS 31053

The NPRO power, amplifier powers, and a few of the laser diodes inside the amps look to have some drift over the past several days that follows each other, sometimes inversely. Looking at past checks, this relationship isn't new, but the NPRO power doesn't normally drift around this much. Since it's still not a huge difference, I'm mostly just noting it here and don't think it's a major issue.

The rise in PMC reflected power has definitely slowed down, and has even dropped noticeably in the past day or so by almost 0.5W.

The operator team has been noticing that we are dropping out of observing for the PMC PZT to relock (80368, 80214, 80206...).

There's already a PZT_checker() in SQZ_MANGER at FDS_READY_IFO and FIS_READY_IFO to check the OPO and SHG PZTs are not at their end of their range (OPO PZT re-locks if not between 50-110V and SHG PZT is 15-85V). If they are, it requests them to unlock and relock. This is to force them into a better place before we go into observing. 

I've added PMC to the PZT_checker, will relock if it's outside of 15-85V. Full range is 0-100V. SQZ_MANAGER reloaded. Plan to take GRD though DOWN and back to FDS. 

Annulus ion pump failed about 4:04 AM.  Since the annulus volume is shared by HAM1 and HAM2, the other pump is actively working on the system, noted on the attached trend plot.

System will be evaluated as soon as posible and determine if the pump or controller need replacing.

I tried Elenna's FM6 from 80287, this made the PRCL coupled noise worse, see first attached plot. 

Then Ryan turned off CAL lines and we retook to preshaping (PRCLFF_excitation_ETMYpum.xml) and PRCL injection (PRCL_excitation.xml) templates.  I took the PRCL_excitation.xml injection with the PRCL FF off and increased amplitude from 0.02 to 0.05 to increase coherence over 50Hz. Exported as prclff_coherence/tf.txt, and prcl_coherence/tf_FFoff.txt. All in /opt/rtcds/userapps/release/lsc/h1/scripts/feedforward

Mon Sep 30 08:11:07 2024 INFO: Fill completed in 11min 3secs

Jordan confirmed a good fill curbside.

Because of cold outside temps (8C, 46F) the TCs only just cleared the -130C trip. I have increased the trip temps to -110C, the early-winter setting.

I don't consider this a full investigative report into why we've been having these FSS_OSCILLATION tagged locklosses, but here are some of my quick initial findings:

• FSS_OSCILLATION tags are just glitches over the tag threshold in the lockloss tool that happen with high frequency at a lockloss; not actual oscillations
• When glitches happen, drive to the FSS EOM (H1:PSL-FSS_PC_MON_OUTPUT) rises. Frequent glitches cause the drive to keep rising (see 7min screenshot)
• Glitches are (probably) too fast to be responses of suspensions moving and changing cavity length
  • SUS not seen moving during these times
• Glitches happen while locked, although usually with lower frequency (see screenshot)
• Sometimes after lockloss, glitches can persist and cause actual oscillations, delaying IMC (and IFO) relocking time as the FSS is not ready, see screenshot from last week
• Non FSS_OSCILLATION tagged lockloss example: see screenshot

Please feel free to add comments of anything else anyone finds.

TITLE: 09/30 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 146Mpc
OUTGOING OPERATOR: Ryan C
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 4mph Gusts, 2mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.13 μm/s
QUICK SUMMARY: H1 has been locked and observing for almost 4 hours. One lockloss overnight, which doesn't have an obvious cause but looks to have a sizeable ETMX glitch. Commissioning time is scheduled today from 15:30 to 18:30 UTC.

• Wind and microseism low
• All other systems nominal

TITLE: 09/30 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Reacquisition
INCOMING OPERATOR: Ryan C
SHIFT SUMMARY: Trying to relock and at LOCKING_ALS. Relocking from the previous lockloss wasn't too bad so hopefully this relocking goes smoothly as well. We had superevent candidate S240930aa during my shift!
LOG:

23:00UTC Observing and have been Locked for 2 hours

23:32 Lockloss
    00:09 Started an initial alignment after cycling through CHECK_MICH_FRINGES
    00:47 Initial alignment done, relocking
01:28 NOMINAL_LOW_NOISE
01:32 Observing

04:00 Superevent S240930aa

04:54 Lockloss

Lockloss @ 09/30 04:54UTC

We went out of Observing at 04:53:56, and then lost lock four seconds later at 04:54:01.

TITLE: 09/29 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Oli
SHIFT SUMMARY: H1 was locked this morning until winds picked up, which kept it down through midday. Was able to get relocked this afternoon, but we just had another lockloss as I'm drafting this log.

• 14:30 - H1 relocking, up to MOVE_SPOTS
• 14:48 - Observing
• 16:51 - Lockloss - alog80354
  • Waiting for high winds to calm
• 21:09 - Observing
• 23:32 - Lockloss

LOG:

Lockloss @ 09/29 23:32UTC. Ryan S and I had been watching the FSS channels glitching but Ryan closed them literally seconds before the lockloss happened so not sure yet if it was the FSS but we think it might've been. Wind is also above 30mph and increasing so could've been that too

TITLE: 09/29 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 148Mpc
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 27mph Gusts, 16mph 3min avg
    Primary useism: 0.10 μm/s
    Secondary useism: 0.15 μm/s
QUICK SUMMARY:

Observing at 150Mpc and have been Locked for 2 hours. Winds are still above 25mph but microseism is getting lower.

Since the lockloss at earlier this morning, high winds up to 40mph have made locking H1 problematic; on occasion we can lock DRMI, but rarely. Unfortunately, the forecast says these winds will stick around for most of today.

Lockloss @ 16:51 UTC - link to lockloss tool

Cause looks to me to be from high winds; gusts just hit up to 40mph and suspensions were moving right before the lockloss in a familiar way.

Sun Sep 29 08:11:15 2024 INFO: Fill completed in 11min 11secs