TITLE: 07/05 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 145Mpc
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 4mph Gusts, 3mph 5min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.08 μm/s
QUICK SUMMARY: Taking over from Camilla. H1 has been locked and observing for 1.5 hours. We've had a discussion about violin modes (see her recent alogs for details), so I'll continue to monitor these.

• All systems okay, dust monitors working and levels good

TITLE: 07/05 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 145Mpc
SHIFT SUMMARY:
LOG: In NLN for 1h30.

Currently Observing and with violins slowly damping, slowest to damp is EX08. EX19 is high and not damping on it's own. The spreadsheet says this is a new mode, Ryan and I just started damping it and will watch closely 68650.

Both locks I tried to speed the violin damping slightly by requesting the nominal damping settings if the guardian had used lower settings and the _OUTMON channel was low (stay under 200 with nominal settings). Does the VIOLIN-DAMPING guardian re-check and turn them up again after the mode has dropped? It looks like it doesn't. Tagging SUS.

• Lock #1, NLN @ 23:42UTC alog 71057.
  • Arrived with mainly lock from Tony, violins were high, waited 20 minutes in OMC_WHITENING.
  • Locked for 4h13. 1372564555 unknown lockloss
• Lock #2, NLN @ 05:28 UTC alog 71061.
  • Locking was smooth, had to touch Y-arm during locking. DRMI locked automatically via PRMI. Waited 20 minutes in OMC_WHITENING.

Every lockloss after Tuesday maintenance last week has run up the violins.

Even though before this last lockloss the fundamental mode was very low (but harmonics were still elevated) the IFO has relocked with very high violins. Attached is  the violins screen and DARM at the LOWNOISE ISC_STATES before we get to NLN.

Lockloss after 4h13 in NLN. 1372564555.

Unknown cause. The fundamental violins had reduced but the harmonics were still large.

STATE of H1: Observing at 143Mpc. Been in NLN 3h20 minutes.
Not sure why our range isn't higher, SQZ is fine but violins are still elevated and there has been a little 10-20mph wind.

Old DQ shift entry. Forgot to put an alog in. Apologies for the deelay. 

DQ Shifter: Sharan Banagiri. Fellows: Jennifer Wright, Brina Martinez

• Several summary page issues throughout the week
• Lockloss issues earlier in the week (continuing on from the previous week). Appears to have stabilized at the end of the week.
  • Temperature issues through the LVEA for a while, perhaps causing lock losses. Fixed during Tuesday's maintenance. Hopefully better temp control now.

  • Noise subtraction is not tuned to higher power yet. Temperature affecting alignment. Extra erroneous poles in the digital control systems - HAM ISIs. Ring heat changes, CO2 changes.

• Bump at 120 Hz, overlapping with the powerline harmonic. Coherent with jitter witness channels (Jennie Wright and Andy Lundgren)
  • See further alog by Victoria 
• ASC channels (e.g. H1:ASC-CHARD_P_OUT_DQ) introducing low-frequency noise early in the week, seem to disappear later on
• H1:PEM-EX_VMON_ETMX_ESDPOWER48_DQ pops up on Hveto towards the end of the week. Seems strange that an ESD witness channel seems picking glitches.
• Gravity volunteers identified a ~600 Hz glitch that show up after May 30.
• Loud broadband noise for a minute before lock loss at 20:13 UTC on Friday. Jennie Wright said this was a parametric instability that caused a runaway instability and lockless

  ---

   

Tony had a lockloss that the lockloss tool tagged with a DCPD saturation (our 11 most recent NLN locklosses have been too) 1372544545.

Waited ISC_LOCK waited 20 minutes in OMC_WHITENING for lots of violins to damp. The VOILIN_DAMPING guardian had turned down the gain on EY08 as it was rung up but the damping OUTMON reduced quickly <100 so I increased the gain back to it's nominal for faster damping. Lots of voilins are still rung up and slowly damping, see attached.

SQZ_MANAGER had message "SQZ ASC AS24 not on??" so I took SQZ_MANAGER to NO_SQUEEZING, gracefully cleared the A42 history (sitemap > SQZ > SQZ Overview > IFO ASC > ! graceful clear history) and then SQZ_MANAGER to FREQ_DEP_SQZ. This has happened a couple of times recently 70890 but Vicky and Naoki plan to look into this or automate this week. Tagging SQZ.

TITLE: 07/04 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 6mph Gusts, 4mph 5min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.08 μm/s
QUICK SUMMARY: Tony has relocked us so far up to POWER_25W, so far with no issues but violins are still high so we expect to wait at OMC_WHITENING later.

VAC, SUS, SEI, CDS, Dust monitors okay.

TITLE: 07/04 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 13mph Gusts, 9mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.08 μm/s
QUICK SUMMARY:

16:00 Acknowledge Test T415139 SNEWS.  
17:31 H1:CAL-INJ_MASTER_SW was changed somehow, and took us into commissioning. A moment later it was undone and I took H1 back to observing.

17:54 Lockloss
https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1372528500

Relocking without Initial Alignment.
18:45 OMC WHITENING
20:23 NOMINAL_LOW_NOISE & Observing

22:22 Lockloss
https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1372544545
 

Current IFO Status: Relocking.

17:54 Lockloss
https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1372528500

Lockloss tool isn't working. No Obvious cause determined yet.

Tue Jul 04 10:04:06 2023 INFO: Fill completed in 4min 6secs

Test T415139 SNEWS alarm went off with a request to acknowledge and I am not familar with how to acknowledge the Test.
 

TITLE: 07/04 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 145Mpc
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 6mph Gusts, 4mph 5min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.10 μm/s 
QUICK SUMMARY:
Inherited an IFO that has been Locked for 4 hours and is in Observing.
Violins look pretty decent and are on their way down.

 

TITLE: 07/04 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 146Mpc
SHIFT SUMMARY:

Lock #1:

• Lockloss @ 08:11 - no obvious cause: alog

Lock #2:

• Relocking went unassisted (needed INCREASE_FLASHES for X-arm and PRMI)
• Waited in OMC_WHITENING for about 1.5 hours for violins to damp
  • Spoke with Rahul as he's been monitoring these violin ringups. We're still unsure as to why they're being kicked so much following a lockloss, but we agree that the nominal full-power damping settings are still working. Might be worth trying on next lock acquisition if they're rung up again to carefully increase some of the damping gains to save time (Rahul would like to be on standby if this is done)
• NLN and Observing @ 10:50

Handing off to Tony for the day.

LOG:

No log for this shift.

Since there won't be a maintenance window due to the holiday today, I've disabled the automatic start for both the magnetic injections and in-lock charge measurements so we can continue observing. I did this by taking both the PEM_MAG_INJ and SUS_CHARGE guardian nodes to DOWN.

State of H1: Observing at 145Mpc

Relocking was straightforward following the earlier lockloss save for waiting 90 minutes in OMC_WHITENING for violins to damp (seems to be the norm these days). Now back observing for the past 15 minutes.

FAMIS 19983