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Reports until 13:02, Tuesday 15 July 2025
H1 SUS
filiberto.clara@LIGO.ORG - posted 13:02, Tuesday 15 July 2025 - last comment - 15:19, Monday 28 July 2025(85770)
Top Sat Amps Modified: MC2/PR2/ETMX (MO, RO, UIM, and TMS)

WP 12675
WP 12676
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 EX PUM SAT Amp was NOT upgraded. 

Suspension Old New OSEM
ETMX MO S1100128 S1100075 F1F2F3SD
ETMX MO/RO S1100079 S1100163 RTLF/RTLF
ETMX RO S1100149 S1100132 F1F2F3SD
ETMX UIM S1000297 S1100140 ULLLURLR
TMSX S1100098 S1100150 F1F2F3LF
TMSX S1000292 S1100058 RTSD
MC2 S1100107 S1100071 T1T2T3LF
MC2/PR2 S1100087 S1100147 RTSD/T1T2
PR2 S1100172 S1100121 T3LFRTSD


F. Clara,  J. Kissel

Comments related to this report
oli.patane@LIGO.ORG - 17:29, Thursday 24 July 2025 (85981)

As of 2025/07/25 00:00 UTC, the TMSX satamp box for F1/F2/F3/LF has been swapped from S1100150 to S1100122

See 85980 for more info

jeffrey.kissel@LIGO.ORG - 14:16, Monday 28 July 2025 (86028)
Here's the characterization data and fit results for  S1100075 , assigned to ETMX M0's F1F2F3SD OSEMs (Fil refers to this as ETMX MO F1F2F3SD).
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_S1100075_ETMX_M0_F1F2F3SD_20250710.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
ETMX     M0       S1100075         CH1                F1           0.0971:5.31     120           zpk([5.31],[0.0971],1,"n")
                                   CH2                F2           0.0973:5.33     120           zpk([5.33],[0.0973],1,"n")
                                   CH3                F3           0.0979:5.36     120           zpk([5.36],[0.0979],1,"n")
                                   CH4                SD           0.0953:5.21     120           zpk([5.21],[0.0953],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 discusses, I'm intentionally excluding the fit of transimpedance gain from the foton design string, and so I've stopped using the R_TIA_kOhm as a knob in my by-hand fitting of the zeros and poles. Hence, you'll find that from here on, R_TIA_kOhm will almost always be the default 120 kOhm value I've found that works with the measured data and changing only the zero:pole frequency.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 14:16, Monday 28 July 2025 (86029)
Here's the characterization data and fit results for  S1100163 , assigned to ETMX M0/R0's LFRT/LFRT OSEMs (Fil refers to this as ETMX MO/RO RTLF/RTLF 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_S1100163_ETMX_M0R0_LFRTLFRT_20250710.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
ETMX     M0R0      S1100163        CH1                LF           0.0948:5.18     120           zpk([5.18],[0.0948],1,"n")
                                   CH2                RT           0.0954:5.21     120           zpk([5.21],[0.0954],1,"n")
                                   CH3                LF           0.0969:5.30     120           zpk([5.30],[0.0969],1,"n")
                                   CH4                RT           0.0947:5.17     120           zpk([5.17],[0.0947],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 - 14:33, Monday 28 July 2025 (86030)
Here's the characterization data and fit results for  S1100132 , assigned to ETMX R0's F1F2F3SD OSEMs (Fil refers to this as ETMX 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_S1100132_ETMX_R0_F1F2F3SD_20250710.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
ETMX     R0        S1100132        CH1                F1           0.0943:5.17     120.75        zpk([5.17],[0.0943],1,"n")
                                   CH2                F2           0.0960:5.25     121.00        zpk([5.25],[0.0960],1,"n")
                                   CH3                F3           0.0963:5.28     121.25        zpk([5.28],[0.0963],1,"n")
                                   CH4                SD           0.0970:5.33     120.75        zpk([5.33],[0.0970],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/

This sat amp actually needed some fit transimpedance gain, so I report it here. But, again, it's not used in the compensation filter.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 14:50, Monday 28 July 2025 (86031)
Here's the characterization data and fit results for  S1100140 , assigned to ETMX L1's ULLLURLR OSEMs (Fil refers to this as ETMX UIM ULLLURLR 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_S1100140_ETMX_L1_ULLLURLR_20250715.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
ETMX     L1       S1100140         CH1                UL           0.0943:5.14     120.5         zpk([5.14],[0.0943],1,"n")
                                   CH2                LL           0.0965:5.26     120.5         zpk([5.26],[0.0965],1,"n")
                                   CH3                UR           0.0943:5.14     120.5         zpk([5.14],[0.0943],1,"n")
                                   CH4                LR           0.0961:5.24     120.5         zpk([5.24],[0.0961],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/

Similar to S1100132, I found I needed to slightly adjust the transimpedance to get a good phase fit of the zero frequency while getting magnitude scale to the ~1.000 +/- 0.005 level. Again, this won't be used in the compensation filter.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 14:55, Monday 28 July 2025 (86032)
Here's the characterization data and fit results for  S1100122 , which -- per LHO:85981, LHO:85980 and after 2025-07-25, has been assigned to TMSX M1's F1F2F3LF OSEMs (Fil refers to this as just TMSX 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_S1100122_TMSX_M1_F1F2F3LF_20250724.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
TMSX     M1       S1100122         CH1                F1           0.0962:5.26     120           zpk([5.26],[0.0962],1,"n")
                                   CH2                F2           0.0971:5.31     120           zpk([5.31],[0.0971],1,"n")
                                   CH3                F3           0.0957:5.24     120           zpk([5.24],[0.0957],1,"n")
                                   CH4                LF           0.0951:5.20     120           zpk([5.20],[0.0951],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 - 15:06, Monday 28 July 2025 (86033)
Here's the characterization data and fit results for  S1100058 , assigned to TMSX M1's RTSD OSEMs and CH3CH4 are not connected to any OSEM in-vacuum, hence the "xxxx" place holders (Fil refers to this as just TMSX 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_S1100058_TMSX_M1_RTSDxxxx_20250708.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
TMSX     M1       S1100058         CH1                RT           0.0939:5.11     121           zpk([5.11],[0.0939],1,"n")
                                   CH2                SD           0.0960:5.25     120           zpk([5.25],[0.0960],1,"n")
                                   CH3                xx           0.0955:5.23     120           zpk([5.23],[0.0955],1,"n")
                                   CH4                xx           0.0961:5.25     120           zpk([5.25],[0.0961],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 (mostly) the default 120 kOhm, save for CH1.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 15:11, Monday 28 July 2025 (86034)
Here's the characterization data and fit results for  S1100071 , assigned to MC2 M1's T1T2T3LF OSEMs (Fil refers to this as just MC2 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_S1100071_MC2_M1_T1T2T3LF_20250710.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
MC2      M1       S1100071         CH1                T1           0.0977:5.34     120           zpk([5.34],[0.0977],1,"n")
                                   CH2                T2           0.0956:5.23     120           zpk([5.23],[0.0956],1,"n")
                                   CH3                T3           0.0948:5.18     120           zpk([5.18],[0.0948],1,"n")
                                   CH4                LF           0.0958:5.22     120           zpk([5.22],[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 - 15:15, Monday 28 July 2025 (86035)
Here's the characterization data and fit results for  S1100147 , assigned to MC2/PR2 M1's RTSD/T1T2 OSEMs (Fil refers to this as just MC2/PR2 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_S1100147_MC2PR2_M1_RTSDT1T2_20250710.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
MC2      M1       S1100147         CH1                RT           0.0975:5.33     120           zpk([5.33],[0.0975],1,"n")
MC2      M1                        CH2                SD           0.0947:5.18     120           zpk([5.18],[0.0947],1,"n")
PR2      M1                        CH3                T1           0.0969:5.29     120           zpk([5.29],[0.0969],1,"n")
PR2      M1                        CH4                T2           0.0962:5.25     120           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/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 - 15:19, Monday 28 July 2025 (86036)
Here's the characterization data and fit results for  S1100121 , assigned to PR2 M1's T3LFRTSD OSEMs (Fil refers to this as just PR2 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_S1100121_PR2_M1_T3LFRTSD_20250710.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
PR2      M1       S1100121         CH1                T3           0.0979:5.37     120           zpk([5.37],[0.0979],1,"n")
                                   CH2                LF           0.0967:5.29     120           zpk([5.29],[0.0967],1,"n")
                                   CH3                RT           0.0958:5.24     120           zpk([5.24],[0.0958],1,"n")
                                   CH4                SD           0.0969:5.31     120           zpk([5.31],[0.0969],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
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