TITLE: 09/20 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 149Mpc
INCOMING OPERATOR: Ryan C
SHIFT SUMMARY: Currently Observing at 150 Mpc and have been Locked for 13.5 hours now. We dropped Observing for the calibration measurements earlier today, but besides that, nothing has happened.
LOG:

14:30 Observing and have been Locked for 4.5 hours
    15:26:03 GRB-Short E601013
    15:26:14 GRB-Short E601014
    15:26:25 GRB-Short E601013 (again?)
    18:31 Dropped out of Observing to run calibration measurements
    18:31 Went to NLN_CAL_MEAS, took calibration measurements
    19:02 Back to NOMINAL_LOW_NOISE
    19:02 Observing
    19:41 Big plane flying overhead Tagging detchar

TITLE: 09/20 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 147Mpc
OUTGOING OPERATOR: Oli
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 21mph Gusts, 16mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.21 μm/s
QUICK SUMMARY:

• We've been locked for almost 13 hours
• Secondary microseism is decreasing

At the time of starting the calibration suite, we had been locked for 8.5 hours and so were fully thermalized.

Calibration monitor screen

Report (found at /ligo/groups/cal/H1/reports/20250920T183850Z/H1_calibration_report_20250920T183850Z.pdf

Broadband
2025-09-20 18:32:12 - 18:37:23 UTC
/ligo/groups/cal/H1/measurements/PCALY2DARM_BB/PCALY2DARM_BB_20250920T183212Z.xml

Simulines
2025-09-20 18:38:50 - 19:02:14 UTC
/ligo/groups/cal/H1/measurements/DARMOLG_SS/DARMOLG_SS_20250920T183850Z.hdf5
/ligo/groups/cal/H1/measurements/PCALY2DARM_SS/PCALY2DARM_SS_20250920T183850Z.hdf5
/ligo/groups/cal/H1/measurements/SUSETMX_L1_SS/SUSETMX_L1_SS_20250920T183850Z.hdf5
/ligo/groups/cal/H1/measurements/SUSETMX_L2_SS/SUSETMX_L2_SS_20250920T183850Z.hdf5
/ligo/groups/cal/H1/measurements/SUSETMX_L3_SS/SUSETMX_L3_SS_20250920T183850Z.hdf5

Sat Sep 20 10:44:23 2025 INFO: Fill completed in 9min 20secs

Note this fill ran at the later time of 10:35:00 this morning.

Haven't seen this for a while, but CP1 code must have skipped the 10:00:00 start time. I've manually loaded an temporary config to run at 10:35:00, it is running now.

TITLE: 09/20 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 150Mpc
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 4mph Gusts, 2mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.24 μm/s
QUICK SUMMARY:

Observing at 150 Mpc and ave been Locked for 4.5 hours. Secondary useism is on its way back down

TITLE: 09/20 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 155Mpc
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY: We lost lock once, relocking was smooth. we've been locked for a little over an hour.
LOG:                                                                                                                                                                                                                                    

• 02:32 UTC lockloss
  • 02:48 -04:29 UTC SEI to useism
  • 02:54 UTC GRB-Short E600822
  • 03:47 UTC Observing

02:32 UTC lockloss

Closes FAMIS26687, last checked in alog86869

Nothing really of note, MR_FAN6_170_1 has some transient noise.

Rick, Dripta & I went into the PCAL lab to setup the PCAL lab for responsivity ratio measurements again.

We installed refl and trans mirrors and aimed the beam at the center of the Apatures on PS4 & PS5.
We also touched up the AOM to see if we can get rid of satelite beams around an iris inside the TX module.

The AOM was swapped out due to the old one (S.N. 124001) having what looks to be a crack in the outside of the AOM.
New AOM ( S.N. 125715 ) was put in it's place and aligned.
We then measured the input power before the AOM : 1.9 W
Then measured the First Order max diffracted power : 1.45 W
then measured the Zero Order power with the power to the AOM OFF: 1.85 W
So the new Diffration Efficiency is First Order / Zero Order: 78.4 %
The AOM Tx : Zero order / Input:  76.3%

We then Checked the BS power on the Trans beam using the High power head to get 333mW.
Then the Refl beam was 335 mW.

We then tuned up the OFS.
New OFS gain  is 5.62V
new OFS Loop Offset : 4.00V

Unity Gain Frequency : 61.5 khz
40 degrees of Phase margin
46 dB @ 100hz
 

TITLE: 09/19 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 154Mpc
INCOMING OPERATOR: Ryan C
SHIFT SUMMARY: We're Observing at 155 Mpc and have been Locked for almost 5 hours now. Secondary microseism is pretty high, but the shift was uneventful.
LOG:

14:30 Observing and have been Locked for over 1.5 hours
15:18 Lockloss
    - Couple locklosses due to green dropping out (probably due to eq)
    - DRMI, PRMI not catching, running an initial alignment
18:44 NOMINAL_LOW_NOISE
    18:51 Observing

TITLE: 09/19 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 151Mpc
OUTGOING OPERATOR: Oli
CURRENT ENVIRONMENT:
    SEI_ENV state: USEISM
    Wind: 7mph Gusts, 3mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.39 μm/s
QUICK SUMMARY:

• We've relocked following the earthquake
  • We've been locked a llittle over 4 hours
• Secondary microseism is increasing

Closes FAMIS#26662, last checked 86750

Laser Status:
    NPRO output power is 1.873W
    AMP1 output power is 69.91W
    AMP2 output power is 138.9W
    NPRO watchdog is GREEN
    AMP1 watchdog is GREEN
    AMP2 watchdog is GREEN
    PDWD watchdog is GREEN

PMC:
    It has been locked 3 days, 3 hr 49 minutes
    Reflected power = 24.56W
    Transmitted power = 104.1W
    PowerSum = 128.7W

FSS:
    It has been locked for 0 days 3 hr and 22 min
    TPD[V] = 0.5336V

ISS:
    The diffracted power is around 4.5%
    Last saturation event was 0 days 5 hours and 44 minutes ago


Possible Issues:
	PMC reflected power is high
	FSS TPD is low

Closes FAMIS#26657, last checked 86805

Everything looking good this week, some of the elevated noise from last week is lower now

Fri Sep 19 10:09:17 2025 INFO: Fill completed in 9min 13secs

The ALS COMM beatnote is reduced by about 3dB (was -4 dBm before power outage, is now -7dBm).  This is probably OK, our past experience was that we start to have trouble with ALS when the ground motion is high and the beatnote is about -15dBm. 

The attached screenshot shows the power arriving on ISCT1 can explain this, the first cursor is the power outage time and the second cursor is when the power through the EOM was reduced 86966

Lockloss at 2025-09-19 15:19 UTC. We were waiting for an earthquake to come through - we had just entered earthquake mode and I had taken us to Hi ASC Gain mode because it looked like we might need that, but we lost lock. Checking now if the ASC hi gains is what caused the lockloss because it wasn't the ground motion