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Reports until 13:20, Tuesday 29 July 2025
H1 SUS
oli.patane@LIGO.ORG - posted 13:20, Tuesday 29 July 2025 - last comment - 14:05, Tuesday 29 July 2025(86070)
Apparent alignment shift in SR3 due to OSEM calibration update

As part of the estimator work, we measured and calculated OSEMINF gains (85907) and compensating gain filter modules for the DAMP bank (86026). We believe these new values to be correct, so we have gone ahead and permanently updated the OSEMINF gains as well as turned on the compensating gains in FM7 in the DAMP filter bank for SR3.
This update means that there will be a difference in the apparent location of the DAMP INs, but this is just because of the change in the OSEMINF gains. These gains were changed (along with the compensating gains filter modules turned on) at 2025-07-29 16:58 UTC. They were put into SDF safe and will be saved in OBSERVE once we get there.

OSEM Old OSEMINF gain New OSEMINF gain
T1 1.478 3.213
T2 0.942 1.517
T3 0.952 1.494
LF 1.302 1.733
RT 1.087 1.494
SD 1.290 1.793

The compensation gains put in in the DAMP filter bank are in FM7, and they are the following:

L: 0.740
T: 0.732
V: 0.548
R: 0.550
P: 0.628
Y: 0.757

 

Images attached to this report
Comments related to this report
ryan.crouch@LIGO.ORG - 14:05, Tuesday 29 July 2025 (86076)
Link

Accepted these changes in SDF.

Images attached to this comment
H1 General
mitchell.robinson@LIGO.ORG - posted 13:12, Tuesday 29 July 2025 (86069)
Work Platform section intalled -X side of BSC2

Randy, Jim, and Mitchell

One section of the work platform was installed on the -X side of BSC2 this morning.

Images attached to this report
H1 General
anthony.sanchez@LIGO.ORG - posted 12:49, Tuesday 29 July 2025 (86068)
LVEA Sweep

LVEA has been swept.

H1 CDS
patrick.thomas@LIGO.ORG - posted 11:58, Tuesday 29 July 2025 (86066)
Added IPFCC6, IPFCC8, and PTCC7 to h0vacly 
Closes WP 12719.

Patrick T., Gerardo M., Dave B.

"Update the h0vacly Beckhoff TwinCAT 3 system manager and PLC code to add the IPFCC6 and IPFCC8 filter cavity tube ion pumps and the PTCC7 filter cavity tube gauge. Will require a restart of the PLC and IOC. Will require a DAQ restart."

This has been completed. The code on h0vacly is now at commit 6a6e7bc55cb87bc9188312eee1c9a8129bdf7946. No issues. Dave did a burt restore. A DAQ restart is pending.
H1 SUS (CDS, Lockloss, SUS, SYS)
richard.mccarthy@LIGO.ORG - posted 11:01, Tuesday 29 July 2025 (86064)
EX TMS Coil Driver Replacement

Trying to narrow down why TMS x is involved in lock losses we have replaced the TMS coil driver that works on F1,2,3 and LF.  Chassis S1102670 was replaced with S1102666.  The operator returned the system to damping.  This is a wait and see test.

Images attached to this report
LHO VE
david.barker@LIGO.ORG - posted 10:32, Tuesday 29 July 2025 (86062)
Tue CP1 Fill

Tue Jul 29 10:08:48 2025 INFO: Fill completed in 8min 44secs

 

Images attached to this report
H1 SUS
ryan.crouch@LIGO.ORG - posted 10:23, Tuesday 29 July 2025 - last comment - 11:41, Tuesday 29 July 2025(86061)
TMSX coil driver chassis swap OSEM check

After Richard swapped the TMSX coil driver chassis I took a look at the raw OSEM counts for the TMSX (F1, F2, F3, LF) comparing to a time earlier when TMSX and ISC_LOCK were both in the same state (ALIGNED, DOWN). I see that LFs counts are ~2500 counts lower post swap. I'm not sure if there are any other checks to run.

Images attached to this report
Comments related to this report
ryan.crouch@LIGO.ORG - 11:41, Tuesday 29 July 2025 (86065)
Link

I took a damped and undamped spectra of the OSEMs.

Images attached to this comment
H1 CDS
erik.vonreis@LIGO.ORG - posted 09:49, Tuesday 29 July 2025 - last comment - 16:44, Tuesday 29 July 2025(86059)
Dolphin IX switch replaced at EX

The dolphin IX switch at EX had broken management interface which prevented fencing of front end from the dolphin network for safe reboots.

I installed a new switch.  As part of the process, h1cdsrfm was turned off to avoid crashing it and in turn crashing CS and EY dolphin networks. 

When I turned h1cdsrfm back on, the cdsrfm port on the switch was already enabled, which led to timing glitches on h1susex and h1iscex.  This could have been prevented by re-fencing h1cdsrfm after the new switch was turned on.

I restarted the models on h1susex and h1iscex.  A few minutes later, h1susex crashed in the dolphin driver and had to be rebooted.  The crash was reminiscent of several susex (plus all of ey) crashes related to restarts of dis_networkmgr on the bootserver.  See 67389 for one example.

Comments related to this report
erik.vonreis@LIGO.ORG - 16:44, Tuesday 29 July 2025 (86089)
Link

Switch sn ISX600-HN-000224 was replaces with ISX600-HN-000258.

H1 CDS
jonathan.hanks@LIGO.ORG - posted 09:17, Tuesday 29 July 2025 (86056)
CDSMonitor was locked up, rebooted it

As part of maintenance we found the cdsmonitor computer had locked up.  It came back after a hard boot.

H1 General
ryan.crouch@LIGO.ORG - posted 07:34, Tuesday 29 July 2025 - last comment - 10:34, Tuesday 29 July 2025(86050)
OPS Tuesday day shift start

TITLE: 07/29 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 0mph Gusts, 0mph 3min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.05 μm/s
QUICK SUMMARY:

Comments related to this report
ryan.crouch@LIGO.ORG - 08:09, Tuesday 29 July 2025 (86051)Lockloss, SUS
Link

When the SUS_CHARGE was finishing up and SWAPPING_BACK_TO_ETMX ETMX L3 started to constantly saturate and there was a big line on DARM at ~150. This behavior persisted even after the GRD was done and went back to waiting. (tagging SUS).

 

15:02 UTC I induced a lockloss at by flipping the polarity of H1:IMC-REFL_SERVO_IN1POL, to break the lock and to stop the EX saturations.

elenna.capote@LIGO.ORG - 10:12, Tuesday 29 July 2025 (86060)
Link

I took a look at why there were saturations, and I think it's because of our changes yesterday. When the measurement finished, the ETMX bias was reverted to the new value that Sheila and I used yesterday, but the L3 drivealign gain was set to the old value of 198 instead of the new value of 88. I looked at the script and I don't understand exactly how that happened since it appears that it pulls the values right from LSCparams, but the ndscope I attached shows this is what happened.

Images attached to this comment
ryan.crouch@LIGO.ORG - 10:34, Tuesday 29 July 2025 (86063)
Link

I think this was due to the fact that the SUS_CHARGE GRD was not reloaded after lscparams was changed, I've reloaded the GRD.

H1 CDS
erik.vonreis@LIGO.ORG - posted 06:41, Tuesday 29 July 2025 (86049)
Workstations updated

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

H1 SUS
filiberto.clara@LIGO.ORG - posted 14:07, Tuesday 22 July 2025 - last comment - 09:25, Tuesday 29 July 2025(85922)
Top Sat Amps Modified: MC1, MC3, and ETMY (MO, RO, TMS)

WP 12696
ECR E2400330
Drawing D0901284-v5
Modified List T2500232

The following SUS SAT Amps were upgraded per ECR E2400330. Modification improves the whitening stage to reduce ADC noise from 0.05 to 10 Hz. The EY PUM and UIM SAT Amps were NOT upgraded.

Suspension Old New OSEM
ETMY MO S1100098 S1100088 F1F2F3SD
ETMY MO/RO S1100079 S1100083 RTLF/RTLF
ETMY RO S1100087 S1000281 F1F2F3SD
TMSY S1100172 S1100148 F1F2F3LF
TMSY S1100107 S1100172 RTSD
MC1 S1100128 S1100118 T1T2T3LF
MC1/MC3 S1000292 S1000287 RTSD/T1T2
MC3 S1000297 S1100119 T3LFRTSD

F. Clara, J. Kissel, O. Patane, M. Pirello

Comments related to this report
oli.patane@LIGO.ORG - 14:27, Tuesday 22 July 2025 (85924)
Link

Once the new satamps were installed, I ran the script satampswap_bestpossible_filterupdate_ECR_E2400330.py to update the compensation filters for these suspensions. These 'best possible' compensation gains come from the tests Jeff did on each satamp before installation, which are found in /ligo/svncommon/SusSVN/sus/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Results/.

My input and the corresponding output is below:


oli.patane@cdsws27:/ligo/svncommon/SusSVN/sus/trunk/Common/PythonTools$ py satampswap_bestpossible_filterupdate_ECR_E2400330.py -o TMSY ETMY_M0_R0
All updated filters grabbed for TMSY
TMSY M1 F1 compensation filter updated to zpk([5.3],[0.0969],1,"n")
TMSY M1 F2 compensation filter updated to zpk([5.28],[0.0964],1,"n")
TMSY M1 F3 compensation filter updated to zpk([5.2],[0.095],1,"n")
TMSY M1 LF compensation filter updated to zpk([5.26],[0.096],1,"n")
TMSY M1 RT compensation filter updated to zpk([5.17],[0.0945],1,"n")
TMSY M1 SD compensation filter updated to zpk([5.26],[0.0961],1,"n")
write /opt/rtcds/userapps/release/sus/h1/filterfiles/H1SUSTMSY.txt
Done writing updated filters for TMSY

All updated filters grabbed for ETMY
ETMY R0 F1 compensation filter updated to zpk([5.2],[0.0951],1,"n")
ETMY R0 F2 compensation filter updated to zpk([5.2],[0.0951],1,"n")
ETMY R0 F3 compensation filter updated to zpk([5.25],[0.0959],1,"n")
ETMY R0 SD compensation filter updated to zpk([5.35],[0.098],1,"n")
ETMY M0 F1 compensation filter updated to zpk([5.31],[0.0971],1,"n")
ETMY M0 F2 compensation filter updated to zpk([5.27],[0.0965],1,"n")
ETMY M0 F3 compensation filter updated to zpk([5.22],[0.0955],1,"n")
ETMY M0 SD compensation filter updated to zpk([5.17],[0.0946],1,"n")
ETMY M0 LF compensation filter updated to zpk([5.2],[0.0951],1,"n")
ETMY M0 RT compensation filter updated to zpk([5.28],[0.0965],1,"n")
ETMY R0 LF compensation filter updated to zpk([5.29],[0.0967],1,"n")
ETMY R0 RT compensation filter updated to zpk([5.26],[0.0962],1,"n")
write /opt/rtcds/userapps/release/sus/h1/filterfiles/H1SUSETMY.txt
Done writing updated filters for ETMY

All done! Remember to double check and load in the filters for ['TMSY', 'ETMY_M0_R0']

oli.patane@cdsws27:/ligo/svncommon/SusSVN/sus/trunk/Common/PythonTools$ py satampswap_bestpossible_filterupdate_ECR_E2400330.py -o MC1 MC3
All updated filters grabbed for MC1
MC1 M1 RT compensation filter updated to zpk([5.13],[0.0937],1,"n")
MC1 M1 SD compensation filter updated to zpk([5.25],[0.096],1,"n")
MC1 M1 T1 compensation filter updated to zpk([5.26],[0.0962],1,"n")
MC1 M1 T2 compensation filter updated to zpk([5.18],[0.0947],1,"n")
MC1 M1 T3 compensation filter updated to zpk([5.32],[0.0972],1,"n")
MC1 M1 LF compensation filter updated to zpk([5.12],[0.0938],1,"n")
write /opt/rtcds/userapps/release/sus/h1/filterfiles/H1SUSMC1.txt
Done writing updated filters for MC1

All updated filters grabbed for MC3
MC3 M1 T3 compensation filter updated to zpk([5.32],[0.0972],1,"n")
MC3 M1 LF compensation filter updated to zpk([5.19],[0.0949],1,"n")
MC3 M1 RT compensation filter updated to zpk([5.35],[0.0979],1,"n")
MC3 M1 SD compensation filter updated to zpk([5.19],[0.0949],1,"n")
MC3 M1 T1 compensation filter updated to zpk([5.31],[0.097],1,"n")
MC3 M1 T2 compensation filter updated to zpk([5.24],[0.0958],1,"n")
write /opt/rtcds/userapps/release/sus/h1/filterfiles/H1SUSMC3.txt
Done writing updated filters for MC3

All done! Remember to double check and load in the filters for ['MC1', 'MC3']

After this I loaded in these new filters.

jeffrey.kissel@LIGO.ORG - 15:40, Monday 28 July 2025 (86037)
Link 

The serial numbers in Fil's and OLD and NEW columns are flip flopped in the main aLOG, LHO:85922.

Here's the corrected version with the serial number's columns flipped to reflect reality.

Suspension	Old         New	           OSEM
ETMY MO	        S1100088    S1100098       F1F2F3SD

ETMY MO/RO	S1100083    S1100079       RTLF/RTLF

ETMY RO	        S1000281    S1100087       F1F2F3SD

TMSY	        S1100148    S1100172       F1F2F3LF

TMSY	        S1100172    S1100107       RTSD

MC1	        S1100118    S1100128       T1T2T3LF

MC1/MC3	        S1000287    S1000292       RTSD/T1T2

MC3	        S1100119    S1000297       T3LFRTSD
jeffrey.kissel@LIGO.ORG - 15:47, Monday 28 July 2025 (86038)
Link 

Here's the characterization data and fit results for  S1100098 , assigned to ETMY M0's F1F2F3SD OSEMs (Fil refers to this as ETMY MO F1F2F3SD above).
The data was taken per methods described in T080062-v3.
The data was processed and fit using 
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/
         plotresponse_S1100098_ETMY_M0_F1F2F3SD_20250717.m

Explicitly, the fit to the whitening stage zero and pole, the transimpedance feedback resistor, and foton design string are
Optic    Stage    Serial_Number    Channel_Number     OSEM_Name    Zero_Pole_Hz    R_TIA_kOhm    Foton_Design
ETMY     M0       S1100098         CH1                F1           0.0971:5.31     120           zpk([5.31],[0.0971],1,"n")
                                   CH2	              F2           0.0965:5.27     120           zpk([5.27],[0.0965],1,"n")
                                   CH3	              F3           0.0955:5.22     120           zpk([5.22],[0.0955],1,"n")
                                   CH4	              SD           0.0946:5.17     120           zpk([5.17],[0.0946],1,"n")
  
The attached plot and machine readable .txt file version of the above table are also found in
${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/

As LHO:85626 and the above LHO:86028 discusses, R_TIA_kOhm is the default 120 kOhm, as it's not used in the compensation filter -- but also because the magnitude of the measurements didn't need me to adjust them; I was able to get a good phase and magnitude fit by just adjusting the zero frequency.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 15:51, Monday 28 July 2025 (86039)
Link 

Here's the characterization data and fit results for  S1100079 , assigned to ETMY M0/R0's LFRT/LFRT OSEMs (Fil refers to this as ETMY MO/RO RTLF/RTLF above -- note his typo in channel order).
The data was taken per methods described in T080062-v3.
The data was processed and fit using 
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/
         plotresponse_S1100079_ETMY_M0R0_LFRTLFRT_20250717.m

Explicitly, the fit to the whitening stage zero and pole, the transimpedance feedback resistor, and foton design string are
Optic    Stage    Serial_Number    Channel_Number     OSEM_Name    Zero_Pole_Hz    R_TIA_kOhm    Foton_Design
ETMY     M0       S1100079	   CH1                LF           0.0951:5.20     120           zpk([5.20],[0.0951],1,"n")
         M0                        CH2                RT           0.0965:5.28     120           zpk([5.28],[0.0965],1,"n")
         R0                        CH3                LF           0.0967:5.29     120           zpk([5.29],[0.0967],1,"n")
         R0                        CH4                RT           0.0962:5.26     120           zpk([5.26],[0.0962],1,"n")
  
The attached plot and machine readable .txt file version of the above table are also found in
${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/

As LHO:85626 and the above LHO:86028 discusses, R_TIA_kOhm is the default 120 kOhm, as it's not used in the compensation filter -- but also because the magnitude of the measurements didn't need me to adjust them; I was able to get a good phase and magnitude fit by just adjusting the zero frequency.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 15:56, Monday 28 July 2025 (86040)
Link 

Here's the characterization data and fit results for  S1100087 , assigned to ETMY R0's F1F2F3SD OSEMs (Fil refers to this as ETMY RO F1F2F3SD above).
The data was taken per methods described in T080062-v3.
The data was processed and fit using 
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/
         plotresponse_S1100087_ETMY_R0_F1F2F3SD_20250717.m

Explicitly, the fit to the whitening stage zero and pole, the transimpedance feedback resistor, and foton design string are
Optic    Stage    Serial_Number    Channel_Number     OSEM_Name    Zero_Pole_Hz    R_TIA_kOhm    Foton_Design
ETMY     R0       S1100087         CH1                F1           0.0951:5.20     120           zpk([5.20],[0.0951],1,"n")
                                   CH2                F2           0.0951:5.20     120           zpk([5.20],[0.0951],1,"n")
                                   CH3                F3           0.0959:5.25     120           zpk([5.25],[0.0959],1,"n")
                                   CH4                SD           0.0980:5.35     120           zpk([5.35],[0.0980],1,"n")
  
The attached plot and machine readable .txt file version of the above table are also found in
${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/

As LHO:85626 and the above LHO:86028 discusses, R_TIA_kOhm is the default 120 kOhm, as it's not used in the compensation filter -- but also because the magnitude of the measurements didn't need me to adjust them; I was able to get a good phase and magnitude fit by just adjusting the zero frequency.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 08:38, Tuesday 29 July 2025 (86053)
Link 

Here's the characterization data and fit results for  S1100172 , assigned to TMSY M1's F1F2F3LF OSEMs (Fil refers to this as TMSY F1F2F3LF above).
The data was taken per methods described in T080062-v3.
The data was processed and fit using 
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/
         plotresponse_S1100172_TMSY_M1_F1F2F3LF_20250717.m

Explicitly, the fit to the whitening stage zero and pole, the transimpedance feedback resistor, and foton design string are
Optic    Stage    Serial_Number    Channel_Number     OSEM_Name    Zero_Pole_Hz    R_TIA_kOhm    Foton_Design
TMSY     M1       S1100172         CH1                F1           0.0969:5.30     120           zpk([5.30],[0.0969],1,"n")
                                   CH2                F2           0.0964:5.28     120           zpk([5.28],[0.0964],1,"n")
                                   CH3                F3           0.0950:5.20     120           zpk([5.20],[0.0950],1,"n")
                                   CH4                LF           0.0960:5.26     120           zpk([5.26],[0.0960],1,"n")
  
The attached plot and machine readable .txt file version of the above table are also found in
${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/

As LHO:85626 and the above LHO:86028 discusses, R_TIA_kOhm is the default 120 kOhm.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 08:42, Tuesday 29 July 2025 (86054)
Link 

Here's the characterization data and fit results for  S1100107 , assigned to TMSY M1's RTSDxxxx OSEMs (Fil refers to this as TMSY RTSD above).
The data was taken per methods described in T080062-v3.
The data was processed and fit using 
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/
         plotresponse_S1100107_TMSY_M1_RTSDxxxx_20250717.m

Explicitly, the fit to the whitening stage zero and pole, the transimpedance feedback resistor, and foton design string are
Optic    Stage    Serial_Number    Channel_Number     OSEM_Name    Zero_Pole_Hz    R_TIA_kOhm    Foton_Design
TMSY     M1       S1100107         CH1                RT           0.0945:5.17     120           zpk([5.17],[0.0945],1,"n")
                                   CH2                SD           0.0961:5.26     120           zpk([5.26],[0.0961],1,"n")
                                   CH3                xx           0.0956:5.23     120           zpk([5.23],[0.0956],1,"n")
                                   CH4                xx           0.0957:5.24     120           zpk([5.24],[0.0957],1,"n")
  
The attached plot and machine readable .txt file version of the above table are also found in
${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/

As LHO:85626 and the above LHO:86028 discusses, R_TIA_kOhm is the default 120 kOhm.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 09:14, Tuesday 29 July 2025 (86055)
Link 

Here's the characterization data and fit results for  S1100128 , assigned to MC1 M1's T1T2T3LF OSEMs (Fil refers to this as MC1 T1T2T3LF above).
The data was taken per methods described in T080062-v3.
The data was processed and fit using 
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/
         plotresponse_S1100128_MC1_M1_T1T2T3LF_20250717.m

Explicitly, the fit to the whitening stage zero and pole, the transimpedance feedback resistor, and foton design string are
Optic    Stage    Serial_Number    Channel_Number     OSEM_Name    Zero_Pole_Hz    R_TIA_kOhm    Foton_Design
MC1      M1       S1100128         CH1                T1           0.0962:5.26     120           zpk([5.26],[0.0962],1,"n")
                                   CH2                T2           0.0947:5.18     120           zpk([5.18],[0.0947],1,"n")
                                   CH3                T3           0.0972:5.32     120           zpk([5.32],[0.0972],1,"n")
                                   CH4                LF           0.0938:5.12     120           zpk([5.12],[0.0938],1,"n")
  
The attached plot and machine readable .txt file version of the above table are also found in
${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/

As LHO:85626 and the above LHO:86028 discusses, R_TIA_kOhm is the default 120 kOhm.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 09:19, Tuesday 29 July 2025 (86057)
Link 

Here's the characterization data and fit results for  S1000292 , assigned to MC1/MC3 M1's RTSD/T1T2 OSEMs (Fil refers to this as MC1/MC3 RTSD/T1T2 above).
The data was taken per methods described in T080062-v3.
The data was processed and fit using 
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/
         plotresponse_S1000292_MC1MC3_M1_RTSDT1T2_20250717.m

Explicitly, the fit to the whitening stage zero and pole, the transimpedance feedback resistor, and foton design string are
MC1      M1       S1000292         CH1                RT           0.0937:5.13     120           zpk([5.13],[0.0937],1,"n")
MC1      M1                        CH2                SD           0.0960:5.25     120           zpk([5.25],[0.0960],1,"n")
MC3      M1                        CH3                T1           0.0970:5.31     120           zpk([5.31],[0.0970],1,"n")
MC3      M1                        CH4                T2           0.0958:5.24     120           zpk([5.24],[0.0958],1,"n")
  
The attached plot and machine readable .txt file version of the above table are also found in
${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/

As LHO:85626 and the above LHO:86028 discusses, R_TIA_kOhm is the default 120 kOhm.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 09:25, Tuesday 29 July 2025 (86058)
Link 

Here's the characterization data and fit results for  S1000297 , assigned to MC3 M1's T3LFRTSD OSEMs (Fil refers to this as MC3 T3LFRTSD above).
The data was taken per methods described in T080062-v3.
The data was processed and fit using 
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/
         plotresponse_S1000297_MC3_M1_T3LFRTSD_20250721.m

Explicitly, the fit to the whitening stage zero and pole, the transimpedance feedback resistor, and foton design string are
MC3      M1       S1000297         CH1                T3           0.0972:5.32     120           zpk([5.32],[0.0972],1,"n")
                                   CH2                LF           0.0949:5.19     120           zpk([5.19],[0.0949],1,"n")
                                   CH3                RT           0.0979:5.35     120           zpk([5.35],[0.0979],1,"n")
                                   CH4                SD           0.0949:5.19     120           zpk([5.19],[0.0949],1,"n")
  
The attached plot and machine readable .txt file version of the above table are also found in
${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/

As LHO:85626 and the above LHO:86028 discusses, R_TIA_kOhm is the default 120 kOhm.
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