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

TCS Chiller Water Level Top-Off - BiWeekly FAMIS 27824

CO2Y:

Before: 10.4

After: 10.4

Water Added: 0ml

CO2X:

Before: 30.4ml

After: 30.4ml

Water Added: 0ml

Updated the Google sheet .

TITLE: 09/18 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Earthquake
INCOMING OPERATOR: Corey
SHIFT SUMMARY:
Calibration & Comissioning went well enough.....Butttt, right after that ended the world started to shake and hasn't real stopped yet.

We sat in Idle for a few hours, while the aftershocks rolled through and we waited for the ground motion slow down. 

Ground motion is approaching the point that we can start locking soon.

LOG:

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

TITLE: 09/19 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 148Mpc
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: SEISMON_ALERT
    Wind: 3mph Gusts, 2mph 3min avg
    Primary useism: 0.10 μm/s
    Secondary useism: 0.45 μm/s
QUICK SUMMARY:

Observing at 150 Mpc and have been Locked for over 1.5 hours. We're at the tail end of a small earthquake that's coming through

TITLE: 09/18 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Earthquake
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY:

Nice shift with H1 currently locked 3+hrs post the big M7.8 Russia EQ.  Have not had any big EQs to knock us out during this shift.
LOG:

• EQ Mode continues
• 2352 Initial Alignment complete
• 2352 LOCK#1:  DRMI locked within a minute!
  • 0006 LOCKLOSS at CARM 5 PICOMETERS & Elenna noted that PRC rang up aroun 64Hz, but we're not sure that loop is the culprit because of an OLG measurement she took.  So the culprit has yet to be determoined.
• 0008 LOCK#2:  DRMI took 11min
  • 0045 LOCKLOSS at DHARD WFS while Elenna was looking at OLGs and walking through CARM 5 PICOMETERS steps (with some TR CARM offset changes also saw ring up around 65Hz)
• 0010 Seismic returns to CALM (woo hoo!!)
• 0047 LOCK#3 DRMI took 11min (again)
  • This time went with Offset & Gain changes Elenna made in previous lock & let ISC_LOCK go on its own.....even with....
  • 0114 EQ Mode Activated 
  • Made it through the tricky spots!!  And then continued on even with H1 in EQ Mode for 10min.
• 0125 Seismic to CALM
• 0141 NLN, but needed to sort out a way to get HAM7 ISOLATED without breaking lock (Jim & Jennie helped with that).
• 0217 OBSERVING

Uploaded a new MEDM screen mapping the location of the RGAs at the site, non functional only to be used as a display.

Most of the RGAs in use are Pfieffer brand, capable to read up to 100 amu, red badges with RGA on them.  Two types of Pfieffer RGAs, Prisma Pro and Prisma Plus.

There is one RGA at the corner station, gray badge in the LVEA, this is a Extrel brand, capable of 1000 amu.