TITLE: 05/27 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 153Mpc
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 19mph Gusts, 16mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.07 μm/s
QUICK SUMMARY:

H1 Has been locked and Observing all day.
Ive been seeing ranges in the low 160s today which is great!

GRB-Short E487675 18:34 UTC
Superevent candidate S240527en

PSL Weekly Status Update Famis 26245

Laser Status:
    NPRO output power is 1.819W (nominal ~2W)
    AMP1 output power is 66.51W (nominal ~70W)
    AMP2 output power is 137.7W (nominal 135-140W)
    NPRO watchdog is GREEN
    AMP1 watchdog is GREEN
    AMP2 watchdog is GREEN
    PDWD watchdog is GREEN

PMC:
    It has been locked 54 days, 21 hr 43 minutes
    Reflected power = 19.44W
    Transmitted power = 107.0W
    PowerSum = 126.4W

FSS:
    It has been locked for 0 days 17 hr and 35 min
    TPD[V] = 0.89V

ISS:
    The diffracted power is around 2.6%
    Last saturation event was 0 days 17 hours and 34 minutes ago

Possible Issues:
    PMC reflected power is high

Mon May 27 10:08:59 2024 INFO: Fill completed in 8min 55secs

Link to the full report: Report

Summary:

• The duty cycle for this week was 59.93%, lower than previous weeks.
• Most locklosses were due to wind or commissioning
• The average range was ~150 most of the week, occasionally increasing to ~160 and dipping down to ~140 when there was low frequency noise
• The glitchgram showed 4kHz glitches intermittently throughout the week, and further searching reveals they’ve been showing up since April 8th with no apparent pattern. More detail on this has been posted in a separate aLog.
• Most days, there is a line of 20Hz noise in the corner accelerometers in the last 8 hours of the UTC day
• Hveto: there were 9 new channels that appeared this week
• FScan: all plots have appeared, the line count ranged from 100 - 850 (or 600 - 850 if we exclude the outlier on the day when LHO was only observing for 4.64% of the day), and never crossed the threshold.

TITLE: 05/27 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 155Mpc
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 8mph Gusts, 5mph 5min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.07 μm/s
QUICK SUMMARY:

H1 is currently locked and Observing with good range.

TITLE: 05/27 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Observing at 150Mpc
INCOMING OPERATOR: TJ
SHIFT SUMMARY: Currently still Observing and have been Locked for 9 hours now. Very quiet evening. The PSL chiller water level alarm was going off so I went in and added 150 mL to it (tagging PSL).

We had some small earthquakes roll through, but they were all small enough that we didn't have to go into earthquake mode. Between 4 and 5 UTC, we had a 17-20 Mpc drop in range; I am attributing it to one of the small earthquakes, but I'm confused as to why the 'peak' lowest range that we had during that time occures 30 minutes after the ground motion peaked (attachment1). Omicron also caught a bunch of low SNR glitches between 20 and 60 Hz during that time(attachment2).
 

LOG:

23:00 Relocking

23:06 NOMINAL_LOW_NOISE
23:13 Observing
    - DIAG_MAIN 'Check PSL Chiller' message - I put 150 mL in

Still Observing and we've been locked for 4 hours. We got a couple earthquake warnings on verbals but didn't need to go into earthquake mode. Other than that a quiet evening!

TITLE: 05/26 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 154Mpc
INCOMING OPERATOR: Oli
SHIFT SUMMARY:
Recovery from the Earthquake: 
I took ISC_LOCK to IDLE for just under and hour to let the Earthquake pass. 
I then started an Initial Alignment, when Peak mon was around 400 or so.
Once that finished relocking was fully automatic.

Observing was reached at 23:13 UTC
 

LOG:                                                                                                            

TITLE: 05/26 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Observing
OUTGOING OPERATOR: Tony
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 13mph Gusts, 8mph 5min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.06 μm/s
QUICK SUMMARY:

Just got into Observing

No smoke along 240

TITLE: 05/26 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Earthquake
CURRENT ENVIRONMENT:
    SEI_ENV state: EARTHQUAKE
    Wind: 11mph Gusts, 7mph 5min avg
    Primary useism: 0.22 μm/s
    Secondary useism: 0.42 μm/s
QUICK SUMMARY:

Unknown Lockloss 19:05 UTC
un-named lockloss screen shots are for the unknown lockloss.

Relocking notes:
Fully automated & Observing reached 20:04:52 UTC

Incoming 6.6M earthquake

Lockloss from the earthquake
Screenshots attached associated with the 6.6 Mag earthquake are named as such.


 

TITLE: 05/26 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 153Mpc
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 12mph Gusts, 8mph 5min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.07 μm/s
QUICK SUMMARY:

Relocking notes:
Mysterious lockloss at Prep_TR_CARM after a suspicious HAM6 saturation.
Some investigations show me a possible CPS glitch on HAM 6 now. tagging SEI. See screenshot.

ALSX went through Increase flashes then had a fault for PLL & PDH, going to green arms manual.
I unlocked ALSX and requested Lock_slow_no_WFS. this did not fix the issue, but it did eventually start staying locked for longer.
so I sent it to Locking ALS to see if I'd get another lockloss. So far its going well.
made it to NLN at 17:21 UTC.

17:24 UTC Observing reached.

Sun May 26 10:09:26 2024 INFO: Fill completed in 9min 22secs

TITLE: 05/26 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Aligning
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 9mph Gusts, 5mph 5min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.07 μm/s
QUICK SUMMARY:

When I got in the ISI ITMX(BSC3) watch dog had been tripped and already reset via software.  I called Jim and let him know that there was not an earthquake that caused the watchdog trip it but a CPS glitch as Tj pointed out in his alog
He asked me to power cycle the 3 BSC3 ISI Interface chassis in the SEI-C6 rack via the 3 DC power switches on the back side of the chassis .  

Lockloss from a 13 hour lockdue to a CPS glitch.
https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1400768048
Screen Shot attached.

While typing out this alog the IFO has been locking and has cycled through check mich fringes a number of times already, I'm doing an Initial_Alignment now.

I've reset the watch dog, but I'd guess that this will happen again. I'll talk with Tony and we'll probably contact SEI.

TITLE: 05/26 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Observing at 157Mpc
INCOMING OPERATOR: TJ
SHIFT SUMMARY: We've been locked for 7:15, very quiet night. PSL ISS DIFF power is low. The wind has calmed down <10mph.

00:54 Observing, following a relock from a earthquake.

We've been locked for 3:40, the wind is calming down and the range is just under 160 Mpc.

TITLE: 05/25 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Earthquake
INCOMING OPERATOR: Oli
SHIFT SUMMARY:
Everything was going well until:

Incoming 6.5M Earthquake from Vanuatu:  
https://earthquake.usgs.gov/earthquakes/eventpage/at00se2biv/

Corresponding lockloss with screen shots attached.
Held ISC_LOCK in Idle 22:40 - 23:37 UTC while the earthquake passed.

On a side note:
Jonathan called to report some smoke near 240, and I went up to the roof to snap a pic.

LOG:
Jonathan & tour goup came to the control and overpass.

TITLE: 05/25 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Earthquake
OUTGOING OPERATOR: Tony
CURRENT ENVIRONMENT:
    SEI_ENV state: EARTHQUAKE
    Wind: 22mph Gusts, 17mph 5min avg
    Primary useism: 0.19 μm/s
    Secondary useism: 0.12 μm/s
QUICK SUMMARY:

• Relocking post earthquake
• The winds are a little high

This morning I took the OPLEV charge measurements on both ETMX and ETMY suspensions. I will post the results below after processing the data.

Both the suspensions were restored to their nominal state after the measurements were complete.