TITLE: 10/19 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Wind
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY:

IFO is LOCKING at ACQUIRE_DRMI_1F

Bad day for the IFO due to the environment.

To start, the wind has not gone under 30Mph for the entire day, and has been over 35mph for the majority. It looks to be dying down now and will continue to do so this evening. Midshift report (alog 87565)

The microseism was sitting just at the 90th percentile point until 3 hrs ago when it started increasing.

We did get to NLN once but due to the known 1Hz CSOFT_P ringup (which previously was managed by increasing gain) but 4 minutes later, we had a Lockloss. (Lockloss alog 87571) This is an ongoing issue where it appears that long lock acquisitions experience the 1Hz ringup more violently than short acquisitions. Due to the microseism and wind, this has been the case for many of the recent locks. Ryan S has an alog about this correlation with a hunch that it is related to IFO thermalization (alog 87557)

In the next lock, since this is bound to happen again, we can either sit at MAX_POWER or increase the gain further (from 25 to 30) and see if either works. The former would test out the hypothesis in Ryan S's alog and the latter would just up the fix from before. 

14:30 UTC - shift start

14:54 UTC - TRANSITION_FROM_ETMX Lockloss

16:42 UTC - Initial Alignment - Fully Auto

17:12 UTC - IFO in IDLE due to WIND

18:36 - Lock Acquisition Attempt

19:35 - Succesful Lock Start

20:24 - NLN Reached (under 1 hr, fully auto)

20:28 - Lockloss due to 1Hz Ringup

22:07 UTC - IFO in IDLE due to MICROSEISM

22:54 UTC - Lock Acquisition Attempt

23:30 UTC - in DRMI, end of shift

LOG:

None

TITLE: 10/19 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Wind
OUTGOING OPERATOR: Ibrahim
CURRENT ENVIRONMENT:
    SEI_ENV state: USEISM
    Wind: 27mph Gusts, 16mph 3min avg
    Primary useism: 0.06 μm/s
    Secondary useism: 0.52 μm/s 
QUICK SUMMARY: H1 has been down most of the day due to high winds and microseism. I think the forecast says it'll calm down a bit this evening, but that remains to be seen. I'll have H1 keep trying for a bit, but may move it back to IDLE if unsuccessful.

• Wind high (30mph+ gusts all day), microseism alos above 90th percentile
• All other systems nominal

Lockloss due to 1Hz Ringup.

Closes FAMIS 27399. Last checked in alog 87406

Laser Status:
    NPRO output power is 1.856W
    AMP1 output power is 70.51W
    AMP2 output power is 139.5W
    NPRO watchdog is GREEN
    AMP1 watchdog is GREEN
    AMP2 watchdog is GREEN
    PDWD watchdog is GREEN

PMC:
    It has been locked 26 days, 4 hr 48 minutes
    Reflected power = 24.74W
    Transmitted power = 106.7W
    PowerSum = 131.4W

FSS:
    It has been locked for 0 days 0 hr and 55 min
    TPD[V] = 0.5245V

ISS:
    The diffracted power is around 3.4%
    Last saturation event was 0 days 1 hours and 5 minutes ago

Possible Issues:
    PMC reflected power is high

Wind is still high. Microseism is rising now.

Managed a 2-minute DRMI lock and that's the highest we've gotten today. If we continue failing and the wind/microseism stays high, I will go into IDLE again until I see any improvements. 

Sun Oct 19 10:08:45 2025 INFO: Fill completed in 8min 41secs

TITLE: 10/19 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Tony
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 31mph Gusts, 16mph 3min avg
    Primary useism: 0.05 μm/s
    Secondary useism: 0.37 μm/s 
QUICK SUMMARY:

IFO is LOCKING at ENGAGE_SOFT_LOOPS

IFO was in the middle of an automatic relock when I arrived. Wind was very high last night but looks to be coming down.

Should be able to go into OBSERVING soon.

TITLE: 10/19 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 152Mpc
INCOMING OPERATOR: Tony
SHIFT SUMMARY: Overall a fairly quiet shift. After an unknown lockloss earlier this evening, I ran H1 through an alignment and it was able to relock fully on its own. H1 has been locked since, now for 3.5 hours.
LOG:

• 00:06 - Lockloss - alog87558
• 00:27 - Starting initial alignment
• 00:47 - Alignment finished, starting lock acquisition
• 01:37 - Observing

Lockloss @ 00:06 UTC after almost 9 hours locked - link to lockloss tool

No obvious cause.

Ibrahim and Sheila saw yesterday a lockloss after just 9 minutes in Nominal Low Noise from CSOFT_P ringing up at 1 Hz, and we again had one overnight at 05:21 UTC (can't link to online lockloss tool since it was down at the time). In both cases, the IFO had been down for several hours beforehand. After the ASC lockloss last night, the IFO relocked within an hour on its own and this CSOFT ringup did not; see first ndscope screenshot of the comparison between these two times. At the start of the third lock stretch overnight, after the IFO was only down for just under 3 hours, CSOFT_P did ring up the same amount of time into Nominal Low Noise, but this time it did not cause a lockloss and eventually calmed back down; see second screenshot. At the start of this lock stretch, after the IFO was down for under 2 hours, CSOFT_P did not seem to ring up at all; see third screenshot. This suggests to me that with a warmer IFO, CSOFT_P doesn't seem to ring up as much at low noise.

The history of this ringup and the last time we changed the CSOFT_P gain can be seen in alog85649. Sheila suggests if we see this ringing up again, we can try bumping the CSOFT_P gain up from 25 to 30. 

TITLE: 10/18 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 149Mpc
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY:

IFO is in NLN and OBSERVING

We have been observing for the whole day.

Acquired lock at 19:10 UTC and H1 was thermalized by the time we had to run the weekly calibration sweep, which ran successfully. Alog 87553.

Range has been consistent and comparable with last few days but seems low in the low frequency range compared to 2 weeks ago. Ryan S is investigating this.

LOG:

TITLE: 10/18 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 150Mpc
OUTGOING OPERATOR: Ibrahim
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 10mph Gusts, 6mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.47 μm/s 
QUICK SUMMARY: H1 has been locked for 7.5 hours. Range is a bit lower than usual; I'll run a range comparison in a bit.

• Wind is low, microseism still high around 90th percentile
• All other systems nominal

Saturday standard coordinated calibration sweep

BB Start: 1444847709

BB End: 1444848020

Simulines Start: 1444848233

Simulines End: 1444849630

2025-10-18 19:06:16,282 | INFO | Finished gathering data. Data ends at 1444849593.0
2025-10-18 19:06:16,498 | INFO | It is SAFE TO RETURN TO OBSERVING now, whilst data is processed.
2025-10-18 19:06:16,498 | INFO | Commencing data processing.
2025-10-18 19:06:16,498 | INFO | Ending lockloss monitor. This is either due to having completed the measurement, and this functionality being terminated; or because the whole process was aborted.
2025-10-18 19:06:52,301 | INFO | File written out to: /ligo/groups/cal/H1/measurements/DARMOLG_SS/DARMOLG_SS_20251018T184336Z.hdf5
2025-10-18 19:06:52,309 | INFO | File written out to: /ligo/groups/cal/H1/measurements/PCALY2DARM_SS/PCALY2DARM_SS_20251018T184336Z.hdf5
2025-10-18 19:06:52,314 | INFO | File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L1_SS/SUSETMX_L1_SS_20251018T184336Z.hdf5
2025-10-18 19:06:52,319 | INFO | File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L2_SS/SUSETMX_L2_SS_20251018T184336Z.hdf5
2025-10-18 19:06:52,324 | INFO | File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L3_SS/SUSETMX_L3_SS_20251018T184336Z.hdf5
PDT: 2025-10-18 12:06:52.452839 PDT
UTC: 2025-10-18 19:06:52.452839 UTC
 

CALIBMONITOR attached (took screenshot after requesting NLN_CAL_MEAS - might be a mistake but do not know)