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Reports until 13:27, Tuesday 23 September 2025
H1 SUS
filiberto.clara@LIGO.ORG - posted 13:27, Tuesday 23 September 2025 - last comment - 11:48, Wednesday 24 September 2025(87103)
Sat Amps Modified: PRM, SRM, ITMY, ITMX, BS, and BS

WP 12802
ECR E2400330
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.

Suspension Old New OSEM
PRM M2 S1100080 S1100064 ULLLURLR
PRM M3 S1100106 S1000285 ULLLURLR
SRM M2 S1100078 S1100095 ULLLURLR
SRM M3 S1000274 S1100091 ULLLURLR
ITMY L1 UIM S1100070 S1100129 ULLLURLR
ITMX L1 UIM S1100141 S1000287 ULLLURLR
BS M2 S1000295 S1100117 ULLLURLR
ETMY UIM S1100159 S1100088 ULLLURLR

 

F. Clara, J. Kissel, O. Patane

Comments related to this report
jeffrey.kissel@LIGO.ORG - 10:56, Wednesday 24 September 2025 (87118)ISC
Here's the characterization data and fit results for S1100064, assigned to PRM M2's ULLLURLR OSEMs.

This sat amp is a UK 4CH sat amp, D0900900 / D0901284.

The data was taken per methods described in T080062-v3, using the diagrammatic setup shown on PAGE 1 of the Measurement Diagrams from LHO:86807.

The data was processed and fit using
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/
         plotresponse_S1100064_PRM_M2_ULLLURLR_20250917.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
PRM      M2       S1100064         CH1                UL           0.0961:5.24     120.25        zpk([5.24],[0.0961],1,"n")
                                   CH2                LL           0.0950:5.18     120.25        zpk([5.18],[0.0950],1,"n")
                                   CH3                UR           0.0961:5.24     120.25	 zpk([5.24],[0.0961],1,"n")
                                   CH4                LR           0.0962:5.25     120.00	 zpk([5.25],[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/Results/

Per usual, R_TIA_kOhm is not used in the compensation filter -- but after ruling out an adjustment in the zero frequency (by zeroing the phase residual at the lowest few frequency points), I nudged the transimpedance a bit to get the magnitude scale within the ~0.25%. shown in the attached results. Any scaling like this will be accounted for instead with the absolute calibration step, i.e. Side Quest 4 from G2501621, a la what was done for PR3 and SR3 top masses in LHO:86222 and LHO:84531 respectively.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 11:00, Wednesday 24 September 2025 (87119)
Here's the characterization data and fit results for  S1000285 , assigned to PRM M3's ULLLURLR OSEMs.

This sat amp is a UK 4CH sat amp, D0900900 / D0901284.

The data was taken per methods described in T080062-v3, using the diagrammatic setup shown on PAGE 1 of the Measurement Diagrams from LHO:86807.

The data was processed and fit using
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/
         plotresponse_S1000285_PRM_M3_ULLLURLR_20250917.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
PRM      M3       S1000285         CH1                UL           0.0956:5.22     120.250       zpk([5.22],[0.0956],1,"n")
                                   CH2                LL           0.0967:5.27     120.250       zpk([5.27],[0.0967],1,"n")
                                   CH3                UR           0.0955:5.21     120.375       zpk([5.21],[0.0955],1,"n")
                                   CH4                LR           0.0950:5.18     120.375       zpk([5.18],[0.0950],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/Results/

Per usual, R_TIA_kOhm is not used in the compensation filter -- but after ruling out an adjustment in the zero frequency (by zeroing the phase residual at the lowest few frequency points), I nudged the transimpedance a bit to get the magnitude scale within the ~0.25%. shown in the attached results. Any scaling like this will be accounted for instead with the absolute calibration step, i.e. Side Quest 4 from G2501621, a la what was done for PR3 and SR3 top masses in LHO:86222 and LHO:84531 respectively.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 11:03, Wednesday 24 September 2025 (87120)
Here's the characterization data and fit results for  S1100095 , assigned to SRM M2's ULLLURLR OSEMs.

This sat amp is a UK 4CH sat amp, D0900900 / D0901284.

The data was taken per methods described in T080062-v3, using the diagrammatic setup shown on PAGE 1 of the Measurement Diagrams from LHO:86807.

The data was processed and fit using
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/
         plotresponse_S1100095_SRM_M2_ULLLURLR_20250917.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
SRM      M2       S1100095         CH1                UL           0.0955:5.22     120           zpk([5.22],[0.0955],1,"n")
                                   CH2                LL           0.0975:5.33     120           zpk([5.33],[0.0975],1,"n")
                                   CH3                UR           0.0951:5.19     120.25        zpk([5.19],[0.0951],1,"n")
                                   CH4                LR           0.0955:5.20     120.25        zpk([5.20],[0.0955],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/Results/

Per usual, R_TIA_kOhm is not used in the compensation filter -- but after ruling out an adjustment in the zero frequency (by zeroing the phase residual at the lowest few frequency points), I nudged the transimpedance a bit to get the magnitude scale within the ~0.25%. shown in the attached results. Any scaling like this will be accounted for instead with the absolute calibration step, i.e. Side Quest 4 from G2501621, a la what was done for PR3 and SR3 top masses in LHO:86222 and LHO:84531 respectively.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 11:08, Wednesday 24 September 2025 (87121)
Here's the characterization data and fit results for  S1100091 , assigned to SRM M3's ULLLURLR OSEMs.

This sat amp is a UK 4CH sat amp, D0900900 / D0901284.

The data was taken per methods described in T080062-v3, using the diagrammatic setup shown on PAGE 1 of the Measurement Diagrams from LHO:86807.

The data was processed and fit using
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/
         plotresponse_S1100091_SRM_M3_ULLLURLR_20250917.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
SRM      M3       S1100091         CH1                UL           0.0983:5.37     120.25        zpk([5.37],[0.0983],1,"n")
                                   CH2                LL           0.0959:5.23     120.25        zpk([5.23],[0.0959],1,"n")
                                   CH3                UR           0.0955:5.23     120.00        zpk([5.23],[0.0955],1,"n")
                                   CH4                LR           0.0957:5.24     120.00        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/Results/

Per usual, R_TIA_kOhm is not used in the compensation filter -- but after ruling out an adjustment in the zero frequency (by zeroing the phase residual at the lowest few frequency points), I nudged the transimpedance a bit to get the magnitude scale within the ~0.25%. shown in the attached results. Any scaling like this will be accounted for instead with the absolute calibration step, i.e. Side Quest 4 from G2501621, a la what was done for PR3 and SR3 top masses in LHO:86222 and LHO:84531 respectively.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 11:35, Wednesday 24 September 2025 (87124)
Here's the characterization data and fit results for  S1100129 , assigned to ITMY L1 (UIM) ULLLURLR OSEMs.

This sat amp is a UK 4CH sat amp, D0900900 / D0901284.

The data was taken per methods described in T080062-v3, using the diagrammatic setup shown on PAGE 1 of the Measurement Diagrams from LHO:86807.

The data was processed and fit using
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/
         plotresponse_S1100129_ITMY_L1_ULLLURLR_20250916.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
ITMY     L1       S1100129         CH1                UL           0.0956:5.23     121.75        zpk([5.23],[0.0956],1,"n")
                                   CH2                LL           0.0966:5.28     120.00        zpk([5.28],[0.0966],1,"n")
                                   CH3                UR           0.0978:5.34     120.00        zpk([5.34],[0.0978],1,"n")
                                   CH4                LR           0.0966:5.27     120.00        zpk([5.27],[0.0966],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/Results/

Per usual, R_TIA_kOhm is not used in the compensation filter -- but after ruling out an adjustment in the zero frequency (by zeroing the phase residual at the lowest few frequency points), I nudged the transimpedance a bit to get the magnitude scale within the ~0.25%. shown in the attached results. Any scaling like this will be accounted for instead with the absolute calibration step, i.e. Side Quest 4 from G2501621, a la what was done for PR3 and SR3 top masses in LHO:86222 and LHO:84531 respectively.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 11:41, Wednesday 24 September 2025 (87125)
Here's the characterization data and fit results for  S1100287 , assigned to ITMX L1 (UIM) ULLLURLR OSEMs.
	(Note the typo in Fil's main entry -- he quotes S1000287, but it's S1100287.

This sat amp is a UK 4CH sat amp, D0900900 / D0901284.

The data was taken per methods described in T080062-v3, using the diagrammatic setup shown on PAGE 1 of the Measurement Diagrams from LHO:86807.

The data was processed and fit using
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/
         plotresponse_S1100287_ITMX_L1_ULLLURLR_20250916.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
ITMX     L1       S1100287         CH1                UL           0.0958:5.23     120           zpk([5.23],[0.0958],1,"n")
                                   CH2                LL           0.0966:5.28     120           zpk([5.28],[0.0966],1,"n")
                                   CH3                UR           0.0941:5.14     120           zpk([5.14],[0.0941],1,"n")
                                   CH4                LR           0.0955:5.23     120           zpk([5.23],[0.0955],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/Results/

Per usual, R_TIA_kOhm is not used in the compensation filter -- but after ruling out an adjustment in the zero frequency (by zeroing the phase residual at the lowest few frequency points), I nudged the transimpedance a bit to get the magnitude scale within the ~0.25%. shown in the attached results. Any scaling like this will be accounted for instead with the absolute calibration step, i.e. Side Quest 4 from G2501621, a la what was done for PR3 and SR3 top masses in LHO:86222 and LHO:84531 respectively.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 11:45, Wednesday 24 September 2025 (87126)
Here's the characterization data and fit results for  S1100117 , assigned to BS M2 ULLLURLR OSEMs.

This sat amp is a UK 4CH sat amp, D0900900 / D0901284.

The data was taken per methods described in T080062-v3, using the diagrammatic setup shown on PAGE 1 of the Measurement Diagrams from LHO:86807.

The data was processed and fit using
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/
         plotresponse_S1100117_BS_M2_ULLLURLR_20250917.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
BS       M2       S1100117         CH1                UL           0.0970:5.31     120           zpk([5.31],[0.0970],1,"n")
                                   CH2                LL           0.0975:5.33     120           zpk([5.33],[0.0975],1,"n")
                                   CH3                UR           0.0967:5.30     120           zpk([5.30],[0.0967],1,"n")
                                   CH4                LR           0.0955:5.22     120.375       zpk([5.22],[0.0955],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/Results/

Per usual, R_TIA_kOhm is not used in the compensation filter -- but after ruling out an adjustment in the zero frequency (by zeroing the phase residual at the lowest few frequency points), I nudged the transimpedance a bit to get the magnitude scale within the ~0.25%. shown in the attached results. Any scaling like this will be accounted for instead with the absolute calibration step, i.e. Side Quest 4 from G2501621, a la what was done for PR3 and SR3 top masses in LHO:86222 and LHO:84531 respectively.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 11:48, Wednesday 24 September 2025 (87127)
Here's the characterization data and fit results for  S1100088 , assigned to ETMY L1 (UIM) ULLLURLR OSEMs.

This sat amp is a UK 4CH sat amp, D0900900 / D0901284.

The data was taken per methods described in T080062-v3, using the diagrammatic setup shown on PAGE 1 of the Measurement Diagrams from LHO:86807.

The data was processed and fit using
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/
         plotresponse_S1100088_ETMY_L1_ULLLURLR_20250916.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     L1       S1100088         CH1                UL           0.0968:5.29     120           zpk([5.29],[0.0968],1,"n")
                                   CH2                LL           0.0956:5.23     120           zpk([5.23],[0.0956],1,"n")
                                   CH3                UR           0.0955:5.22     120           zpk([5.22],[0.0955],1,"n")
                                   CH4                LR           0.0959:5.24     120           zpk([5.24],[0.0959],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/Results/

Per usual, R_TIA_kOhm is not used in the compensation filter -- but after ruling out an adjustment in the zero frequency (by zeroing the phase residual at the lowest few frequency points), I nudged the transimpedance a bit to get the magnitude scale within the ~0.25%. shown in the attached results. Any scaling like this will be accounted for instead with the absolute calibration step, i.e. Side Quest 4 from G2501621, a la what was done for PR3 and SR3 top masses in LHO:86222 and LHO:84531 respectively.
Non-image files attached to this comment
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