TITLE: 10/15 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Tony
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 14mph Gusts, 9mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.35 μm/s
QUICK SUMMARY:

IFO is in NLN and OBSERVING as of 23:14 UTC

Got into observing just now following a rough lock acquisition involving an EQ lockloss and an IM/PR misalignment (in turn related to SDF reversions and dolphin) that took some time to re-align.

Ibrahim, Oli

Below are updates and promising findings concerning the most recent BBSS LHO Top Mass -4mm BP Adjustments to tackle the F1 Drift issue summarized in alog 80577.

On Friday 10/11, Oli P and I moved the blade positions (mm BP Units) to:

Front Left: Side: 0.02, Top: -4.03 Back Left: Side: -0.03, Top -3.90 Front Right: Side: 0.02, -3.91 Back Right: Side: -0.05, -3.95 Avg: Side: -0.01 Height: -3.95

Find:

• LHO Transfer Functions PDF
• LHO and LLO different Blade Positions Comparison PDF (essentially the plot from alog 80589 but with the newest 10/11 results).
• LHO BOSEM (Top Mass and PUM) Counts

The good news is that with these 4.5 days of Data, we see no sign of F1 Drift.

We will post another alog with TF to model comparisons as we find which model d1 parameter fits these -4mm BP positions best.

In prep for heightened demand during the storage building construction, I ran the well pump today for 4 hours beginning at roughly 8:15am PST. 

R. Short, J. Oberling

After the NPRO control box was swapped last week and glitches persisted (see alog80566), we decided it would be best to switch back to the original so that signal readbacks for the NPRO would be accurate. I started by bringing down the PSL in a controlled manner (ISS, FSS, PMC, AMPs, NPRO), then went out to the LVEA PSL racks and swapped control box S/N S2200008 for S2200009. Since this is the control box that had previously been in service with this NPRO laser head, no adjustments were needed to set the temperature and current to be correct. I returned to the control room and brought the whole system back up without issue.

Once it was time to lock the FSS, similar to what was needed with the last control box swap, I manually moved the NPRO temperature down about 0.4K (from 0.19 to -0.23) and locked the RefCav so that the SQZ laser would be happy. I then updated the FSS search parameters and accepted them in SDF (see screenshot).

As I noted in the 10-day trends yesterday (see alog80665), PMC REFL has risen over the past week, so I attempted a remote alignment tweak using the picomotors before the PMC. In the end, I wasn't able to make much of any improvement to the PMC alignment. I also attempted a remote alignment tweak for the RefCav, and here I was able to get a slight improvement from 0.80V to 0.81V on the TPD.

Looking for more things to try to impact the laser glitching and hopefully bring down the amount of PMC reflected power, Jason and I returned to the PSL racks to try adjusting the NPRO pump current. We ultimately raised the current from 2.12A to 2.19A, increasing the NPRO output power from 1.82W to 1.91W according to the PD in front of the laser, but not having much of an impact on the PMC. We also tried slightly altering pump diode currents in the amplifiers, but we didn't see any improvement, so these remain as they were.

I concluded our PSL activities today with a rotation stage calibration following the steps in alog79596. The measurement file, new calibration fit, and screenshot of accepting SDFs are attached.

WP12131 h1tcscs model, add FMs and Voltage slow channels

Daniel, Vicky, Dave:

A new h1tcscs model was installed when h1oaf0 was rebooted this morning. DAQ restart was required, the addition of 51 slow channels.

WP12132 New Dolphin adapter card Firmware.

Keith, Jonathan, Erik, EJ, Tony, Dave:

Downgraded firmware was loaded onto the Dolphin IX-611 adapter cards in h1sush7, h1cdsh8 and h1oaf0. This is to prevent sponteneous PCI level switching which is possibly the cause of some O4 cornerstation Dolphin glitches.

Procedure was:

• safe the systems running on the frontend
• fence the frontend from the Dolphin fabric
• stop all the models
• run the script to load the new firmware
• power down the frontend, then pull the two power cords out for about a minute
• plug the power cords in, power up, let it boot and start the models.

WP12134 DAQ Restart Script, Restart rts-nds.service

Jonathan, Erik, Dave:

To prevent /run/nds/jobs filling, the scripts to restart the DAQ was modified to restart the rts-nds.service on the nds machines as well as restarting their rts-daqd.services.

This allows systemd to empty the /run/nds/jobs directory, which was over 50% full on h1daqnds1. We tested this as part of this morning's DAQ restart, it worked well.

WP12087 Add VACSTAT gauge PVs to DAQ

Dave:

My first attempt to add the VACSTAT PVs relating to vacuum gauge monitoring failed because the channel names exceeded the DAQ length limit of 54 characters.

I modified the VACSTAT code to drop the _PRESS_TORR from the PT channels names, which allowed these channels to be added to the DAQ.

A new H1EPICS_VACSTAT.ini file was created which added 368 channels to the EDC. DAQ and EDC restart was needed.

The new VACSTAT IOC was restarted, and the new MEDMs installed into production.

WP12143 Replace failed SDD in h1guardian1

Dave, Jonathan, Erik:

cds_report reported a failed disk in h1guardian1's md3 raid at noon today. Jonathan and Erik found a failed 230GB SDD which is part of the root file system on h1guardian1. It was replaced  with a 1TB SSD (the smallest we have), resyning the new disk only took about an hour.

DAQ Restart

Jonathan, Erik, Dave:

We restarted the DAQ for the addition of h1tcscs slow channels and the new VACSTAT EDC channels. EDC was restarted, its channel count increased from 57061 to 57429.

This was the first test of the new restart script, which after doing the round of rts-daqd restarts then restarts rts-nds on the nds machines.

The only problem was a spontaneous retstart of framewriter 1 after it had written about 3 full frames. It came back by itself and has been stable since.

J. Kissel
WP 12140

I've completed 6 SUS + 4 ISI = 10 of 12 total DOF excitations that I wanted to drive before I ran out of time this morning. Each drive was "successful" in that I was able to get plenty of coherence between the 4 DOFs of ISI drive and SUS response, and some coherence between 6 SUS drive DOFs and ISI response. As expected, the bulk of the time was spent tuning the ISI excitations. I might have time to "finish" the data set and get the last two missing DOFs, but I was at least able to get both directions of LPY to LPY transfer functions, which are definitely juicy enough to get the analysis team started.

Measurement environmental/configuration differences of the HAM2 ISI from how they are nominally in observing:
    - PR3 M1 DAMP local damping loop gains are at -0.2, where they are nominally at -1.0. (The point of the test.)
    - CPS DIFF is OFF. (needed to do so for maintenance day)
    - Coil Driver z:p = 1:10 Hz analog low-pass (and digital compensation for it) is OFF. (need to do so to get good SNR on SUS M1 drive without saturating the SUS DACs)

Interesting things to call out that are the same as observing:
    - The PR3 alignment sliders were ON. P = -122 [urad]; Y = 100 [urad]. (Don't *expect* dynamics to change with ON vs. OFF, but we have seen diagonal response change if close an EQ stop. Haven't ever looked, but I wouldn't be surprised of off-diagonal responses change. Also DAC range gets consumed by DC alignment request, which is important for driving transfer functions.)
    - Corner station sensor correction, informed by the Bier Garten "ITMY" T240 on the ground. (the h1oaf0 computer got booted this morning, so we had to re-request the SEI_CS configuration guardian to be in WINDY. The SEI_ENV guardian had been set to LIGHT_MAINTENANCE.)
    - PR3 is NOT under any type of ISC global control; neither L, P, or Y. (global ISC feedback for the PRC's LPY DOFs goes to PRM and PR2.)

There are too many interesting transfer functions to attach, or even to export in the limited amount of time I have. 
So -- I leave it to the LSC team that inspired this test to look at the data, and use as needed.

The data have been committed to the SVN here:
    /ligo/svncommon/SusSVN/sus/trunk/HLTS/H1/PR3/SAGM1/Data/
        2024-10-15_1627_H1SUSPR3_M1_WhiteNoise_L_0p02to50Hz.xml
        2024-10-15_1627_H1SUSPR3_M1_WhiteNoise_T_0p02to50Hz.xml
        2024-10-15_1627_H1SUSPR3_M1_WhiteNoise_V_0p02to50Hz.xml
        2024-10-15_1627_H1SUSPR3_M1_WhiteNoise_R_0p02to50Hz.xml
        2024-10-15_1627_H1SUSPR3_M1_WhiteNoise_P_0p02to50Hz.xml
        2024-10-15_1627_H1SUSPR3_M1_WhiteNoise_Y_0p02to50Hz.xml

    /ligo/svncommon/SusSVN/sus/trunk/HLTS/H1/PR3/Common/Data
        2024-10-15_1627_H1ISIHAM2_ST1_WhiteNoise_PR3SusPoint_L_0p02to50Hz.xml
        2024-10-15_1627_H1ISIHAM2_ST1_WhiteNoise_PR3SusPoint_T_0p02to50Hz.xml
            [ran out of time for V]
            [ran out of time for R]
        2024-10-15_1627_H1ISIHAM2_ST1_WhiteNoise_PR3SusPoint_P_0p02to50Hz.xml
        2024-10-15_1627_H1ISIHAM2_ST1_WhiteNoise_PR3SusPoint_Y_0p02to50Hz.xml


For the SUS drives templates, I gathered:
     Typical:
     - The top mass, M1, OSEM sensors, in the LTVRPY Euler Basis, calibrated into microns or microradians, [um] or [urad].
         H1:SUS-PR3_M1_DAMP_?_IN1_DQ             [Filtered with the 64x filter, then downsampled to to fs = 256 Hz]
     - The top mass, M1, OSEM sensors, in the T1T2T3LFRTSDD OSEM Sensor/Coil Basis, calibrated into microns, [um].
         H1:SUS-PR3_M1_OSEMINF_??_OUT_DQ         [Filtered with the 64x filter, then downsampled to to fs = 256 Hz]
     - The top mass, M1, OSEM coils' requested drive, in the T1T2T3LFRTSD OSEM Sensor/Coil Basis, in raw (18 bit) DAC counts, [ct_M1SUS18bitDAC].
         H1:SUS-PR3_M1_MASTER_OUT_??_DQ          [Filtered with the 32x filter, then downsampled to to fs = 512 Hz]

     For this set of templates:
     - The bottom mass i.e. optic, M3, OSEM sensors, in the LPY Euler Basis, calibrated into microns or microradians, [um] or [urad].
         H1:SUS-PR3_M3_WIT_?_DQ                  [Filtered with the 64x filter, then downsampled to to fs = 256 Hz]
     - The bottom mass i.e. optic, M3, optical lever, in PIT YAW Euler Basis, calibrated into mircoradians, [urad].
         H1:SUS-PR3_M3_OPLEV_???_OUT_DQ          [Filtered with the 64x filter, then downsampled to to fs = 256 Hz]
     - The ISI's Stage 1 GS13 inertial sensors, projected to the PR3 suspension point LTVRPY Euler basis, calibrated into nanometers or nanoradians, [nm] or [nrad]
         H1:ISI-HAM2_SUSPOINT_PR3_EUL_?_DQ       [Filtered with the 4x filter, then downsampled to to fs = 1024 Hz]
     - The ISI's Stage 1 super sensors, in the ISI's Cartesian XYZRXRYRZ basis, calibrated into nanometers or nanoradians, [nm] or [nrad]
         H1:ISI-HAM2_ISO_*_IN1_DQ                [Filtered with the 2x filter, then downsampled to to fs = 2048 Hz]

Note: The six M1 OSEM sensors in the Euler Basis are set to be the "A" channels, such that you can reconstruct the transfer function between the M1 Euler Basis to all the other response channels in the physical units stated above. As usual the excitation channel for the given drive DOF (in each template, that's H1:SUS-MC3_M1_TEST_?_EXC) is automatically stored, but these channels are in goofy "Euler Basis (18-bit) DAC counts," so tough to turn into physical units.

For the brand new ISI drive templates, I gathered:
     - The ISI's Stage 1 super sensors, in the ISI's Cartesian XYZRXRYRZ basis, calibrated into nanometers or nanoradians, [nm] or [nrad]
         H1:ISI-HAM2_ISO_*_IN1_DQ                [Filtered with the 2x filter, then downsampled to to fs = 2048 Hz]
     - The ISI's Stage 1 GS13 inertial sensors, projected to the PR3 suspension point LTVRPY Euler basis, calibrated into nanometers or nanoradians, [nm] or [nrad]
         H1:ISI-HAM2_SUSPOINT_PR3_EUL_?_DQ       [Filtered with the 4x filter, then downsampled to to fs = 1024 Hz]

     - The top mass, M1, OSEM sensors, in the LTVRPY Euler Basis, calibrated into microns or microradians, [um] or [urad].
         H1:SUS-PR3_M1_DAMP_?_IN1_DQ             [Filtered with the 64x filter, then downsampled to to fs = 256 Hz]
     - The bottom mass i.e. optic, M3, OSEM sensors, in the LPY Euler Basis, calibrated into microns or microradians, [um] or [urad].
         H1:SUS-PR3_M3_WIT_?_DQ                  [Filtered with the 64x filter, then downsampled to to fs = 256 Hz]
     - The bottom mass i.e. optic, M3, optical lever, in PIT YAW Euler Basis, calibrated into mircoradians, [urad].
         H1:SUS-PR3_M3_OPLEV_???_OUT_DQ          [Filtered with the 64x filter, then downsampled to to fs = 256 Hz]
     - The ISI's Stage 1 actuators' requested drive, in the H1H2H3V1V2V3 ISI actuator basis, in raw (16-bit) DAC counts, [ct_ISIST116bitDAC].
         H1:ISI-HAM2_OUTF_??_OUT                 [Didn't realize in time that there are DQ channels H1:ISI-HAM2_MASTER_??_DRIVE_DQ stored at fs = 2048 Hz, or I would have used those.]

Note: Here, I set the number of "A" channels to twelve, such that both the ISI's Cartesian basis and the PR3 Suspoint basis versions of the GS13s can be used as the transfer function reference channel.