Tue Jun 18 10:08:07 2024 INFO: Fill completed in 8min 3secs

As described in 76326  "kappa_TST is the time-dependent correction factor that tracks the TST stage actuation strength relative to the last time the calibration was updated", but the calibration hasn't been updated more regularly, so if it was still changing, we should see it. Francisco has made a script to automatically adjust the ETMX L2L drivealign to compensate for Kappa_TST but this only started this week: 78425.

In October Ryan's anaylsis showed the Kappa TST drift agreed up with increasing charge on ETMX from in-lock charge measurements: 73613, recent in-lock charge measurements in 75456 show the charge hasn't changed much. To do: check on in-lock charge measuremtns and add a longer time scale plot.

WP11927 TW0 Offload

The copy of the past 6 months of raw minute trend files from h1daqtw0 to h1ldasgw0 via h1daqfw0 was started at 09:39.

Prior to the start of the copy, the past 6 months of files were 'frozen' in a temporary minute_raw_1402759218 directory on tw0 at 08:20 this morning. The NDS process on h1daqnds0 was restarted at 08:34 to serve these data from their temporary path.

FAMIS 20702

About 4 days ago, AMP1 had a slight drop in output power while the NPRO had a slight jump. AMP2 power also had a hit at the same time, but is largely unchanged.

The rise/fall in PMC reflected/transmitted power again looks to have leveled off a bit since last week.

As walking through the LVEA to do the laser transition, things to note: the high bay and clean receiving lights were on, west bay genie lift was plugged in, I unplugged an unused extension cored by CO2Y, I heard a cricket by the y-manifold but couldn't find it, the HAM3 dust monitor has an extension cord running to it but isn't plugged in.

While Dave was working on moving the tw0 files to an archive disk he noticed that the gpstime command was giving bad times.  The data was correct and the time was not:

PDT: 2024-06-18 00:00:00.000000 PDT
UTC: 2024-06-18 07:00:00.000000 UTC
GPS: 1402729218.000000

This was the case on all the h1daq*0 machines.  The cause was an old gpstime package.  We updated the gpstime package and it works as expected.

PDT: 2024-06-18 08:17:31.983990 PDT
UTC: 2024-06-18 15:17:31.983990 UTC
GPS: 1402759069.983990

TITLE: 06/18 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: 5mph Gusts, 3mph 5min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.07 μm/s
QUICK SUMMARY: Locked for 8 hours, magnetic injections running. 4 hours of planned maintenance this morning.

Workstations were updated and rebooted.  This was an OS packages update.  Conda packages were not updated.

TITLE: 06/18 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Observing at 152Mpc
INCOMING OPERATOR: Tony
SHIFT SUMMARY: We are Observing at 152 Mpc and have been Locked for over an hour now. The wind was pretty bad (up to 40mph) most of my shift; now it's down to 15mph. The first lockloss was definitely from the high wind, but relocking actually wasn't as bad as I expected it to be in 35-39mph winds. We lost lock soon after that, 34 minutes into NLN. Second relock was quick - wind was also finally coming down at this point.
LOG:

23:00UTC Detector Observing and Locked for 5.5 hours

03:09 Lockloss from wind
03:11 Initial Alignment
03:56 IA done, relocking
05:00 NOMINAL_LOW_NOISE
05:08 Observing

05:34 Lockloss
05:35 Initial Alignment
05:56 IA done, relocking
06:38 NOMINAL_LOW_NOISE
06:40 Observing
07:16 Superevent S240618ah

Lockloss @ 06/18 05:34 UTC after only 35 minutes locked. I don't believe this one is wind related.

Lockloss @ 06/18 03:09 UTC from the wind

TITLE: 06/17 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 150Mpc
INCOMING OPERATOR: Oli
SHIFT SUMMARY:

IFO is in NLN and OBSERVING as of 18:33 UTC (6 hrs)

It has been a calm day after minimal trouble relocking (multiple post-initial alignment locklosses) at and before DRMI with one at CARM_TO_TR. Planned comissioning occured from 8:30-11:30 and was timely.

Nothing else of note

LOG:

TITLE: 06/17 Eve Shift: 2300-0800 UTC (1600-0100 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 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.06 μm/s
QUICK SUMMARY:

Observing at 155 Mpc and have been Locked for 5.5 hours

FAMIS

27791

Added 150mL to TCSX, none to TCSY. Filters lookded okay for now.

Further testing on the revised A2L script today. On Friday Sheila added a settling time between steps that seemed to help (alog78438), and had increased the run time of the script to just under 7 minutes. Today we wanted try two things: i.) run it a few times in succession to see if we get the same results  ii.) swap the furthest quad frequencies and see if we get the same results. This was only for Y and was right after we relocked and were still thermalizing.

Swapping the line frequencies didn't seem to change much, rather the quads that kept their frequencies changed more. This might hint that we are drifting at the frequencies that A2L should help with, so we will get different answers each time we run it. We only ran it 3 times and while we were still thermalizing, so perhaps we need to run it again after thermalized and see if we still get the same answers.

J. Kissel
TIA D2000592: S/N S2100832_SN02
Whitening Chassis D2200215: S/N S2300003
Accessory Box D1900068: S/N S1900266
SR785: S/N 77429

I've finally got a high quality, trustworthy, no-nonsense measurement of the OMC DCPD transimpedance amplifiers frequency response. For those who haven't seen the saga leading up to today, see the 4 month long story in LHO:77735, LHO:78090, and LHO:78165.

For those who want to move on with their lives, like me: I attach a collection plots showing the following for each DCPD:
Page 1 (DCPDA) and Page 2 (DCPDB)
    - 2023-03-10: The original data set of the previous OMC DCPD's via the same transimpedance amplifier 
    - 2024-05-28: The last, most recent data set before this, where I *thought* that is was good, even though the measurement setup was bonkers, 
    - 2024-06-11: Today's data
Page 3 (the Measurement Setup)
    - The ratio of the measurement setup from 2023-03-10 to 2024-06-11.

With this good data set, we see that
    - there's NO change between the 2023-03-10 and 2024-06-11 data sets at high frequencies, which matches the conclusions from the remote DAC driven measurements (LHO:78112) and
    - there *is* a 0.3% level change in the frequency response at low frequency, which also matches the conclusions from the remote DAC driven measurements. 

Very refreshing to finally have agreement between these two methods.

OK -- so -- what's next? Now we can return to the mission of fixing the front-end compensation and balance matrix such that we can 
   - reduce the impact on the overall systematic error in the calibration, and 
   - reduce the frequency dependent imbalance
that were each discovered in Feb 2024 (see LHO:76232).

Here's the step-by-step:
- Send the data to Louis for fitting.
- Create/install new V2A filters for A0 / B0 bank
- Switch over to these filters and accept in SDF
- Update pydarm parameter file with new super-Nyquist poles and zeros.
- Measure compensation performance with remote DAC driven measurement of TIA*Wh*AntiWh*V2A
	confirm bitterness / flatness

Once IFO is back up, running, (does it need to be thermalized?)
- Measure balance matrix, 
	Remember -- SQZ OFF
	confirm better-ness / flatness
- Install new balance matrix
- Accept Balance Matrix in SDF

Once IFO is thermalized
- grab a new sensing function.
- push a new updated calibration