Reports until 12:27, Tuesday 08 July 2025
H1 SUS
filiberto.clara@LIGO.ORG - posted 12:27, Tuesday 08 July 2025 - last comment - 14:43, Tuesday 08 July 2025(85619)
Top Sat Amps Modified for ITMX/ITMY/SR2

WP 12655
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.

Suspension Old New
ITMY MO S1100071 S1100155
ITMY MO/RO S1100150 S1100175
ITMY RO S1100075 S1100178
ITMX MO S1100163 S1100136
ITMX MO/RO S1100147 S1000275
ITMX RO S1100132 S1100090
SR2 TOP S1100112 S1000296
SR2 TOP RT/SD S1100121 S1100067


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

Comments related to this report
david.barker@LIGO.ORG - 13:58, Tuesday 08 July 2025 (85625)
Link

ITMX ITMY Hardware Watchdog Countdowns, Test Mass Sat Amp swap-outs done in less than 20 minutes.

Images attached to this comment
jeffrey.kissel@LIGO.ORG - 14:02, Tuesday 08 July 2025 (85626)
Link 

Here's the characterization data and fit results for  S1100155 , assigned to ITMY M0's F1F2F3SD OSEMs (Fil refers to this as just "ITMY MO" 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_S1100155_ITMY_M0_F1F2F3SD_20250703.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     M0       S1100155         CH1                F1           0.0966:5.28       120.0       zpk([5.28],[0.0966],1,"n")
                                   CH2                F2           0.0961:5.25       120.0       zpk([5.25],[0.0961],1,"n")
                                   CH3                F3           0.0960:5.23       120.0       zpk([5.23],[0.0960],1,"n")
                                   CH4                SD           0.0951:5.18       120.5       zpk([5.18],[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 with LHO:85504 :: Even though I've fit for the transimpedance gain, I've elected *not* to include a gain in the foton design string relative to "ideal," as there are more scale factors in play that determine the overall [(meters)/(ADC cts)] scale in the calibration of the OSEMs (LED light power, PD response, any cable loss, ADC channel gain, etc.). Determining this overall scale is better left to different methods, a la LHO:84548, which we (eventually) anticipate doing for all SUS with ECR E2400330 upgraded satamps.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 14:09, Tuesday 08 July 2025 (85628)
Link 

Here's the characterization data and fit results for  S1100175 , assigned to ITMY M0/R0's LFRT/LFRT OSEMs, respectively (Fil refers to this as just "ITMY MO/RO" 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_S1100175_ITMY_M0R0_LFRTLFRT_20250703.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     M0       S1100175         CH1                LF           0.0947:5.18     120           zpk([5.18],[0.0947],1,"n")
         M0                        CH2                RT           0.0969:5.30     120           zpk([5.30],[0.0969],1,"n")
         R0                        CH3                LF           0.0969:5.29     120           zpk([5.29],[0.0969],1,"n")
         R0                        CH4                RT           0.0965:5.28     120           zpk([5.28],[0.0965],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/

See above comment LHO:85626 regarding the intentional exclusion of transimpedance gain in the foton design string.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 14:18, Tuesday 08 July 2025 (85629)
Link 

Here's the characterization data and fit results for  S1100178 , assigned to ITMY R0's F1F2F3SD OSEMs (Fil refers to this as just "ITMY RO" 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_S1100178_ITMY_R0_F1F2F3SD_20250703.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     R0       S1100178         CH1                F1           0.0966:5.29     120           zpk([5.29],[0.0966],1,"n")
                                   CH2                F2           0.0957:5.23     120           zpk([5.23],[0.0957],1,"n")
                                   CH3                F3           0.0978:5.36     120           zpk([5.36],[0.0978],1,"n")
                                   CH4                SD           0.0955:5.22     120           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/Scripts/

See above comment LHO:85626 regarding the intentional exclusion of transimpedance gain in the foton design string.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 14:21, Tuesday 08 July 2025 (85630)
Link 

Here's the characterization data and fit results for  S1100136 , assigned to ITMX M0's F1F2F3SD OSEMs (Fil refers to this as just "ITMY MO" 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_S1100136_ITMX_M0_F1F2F3SD_20250703.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     M0       S1100136         CH1                F1           0.0955:5.22     121.10        zpk([5.22],[0.0955],1,"n")
                                   CH2                F2           0.0980:5.35     121.25        zpk([5.35],[0.0980],1,"n")
                                   CH3                F3           0.0950:5.18     121.50        zpk([5.18],[0.0950],1,"n")
                                   CH4                SD           0.0977:5.34     121.50        zpk([5.34],[0.0977],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/

See above comment LHO:85626 regarding the intentional exclusion of transimpedance gain in the foton design string.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 14:33, Tuesday 08 July 2025 (85631)
Link 

Here's the characterization data and fit results for  S1000275 , assigned to ITMX M0/R0's LFRT/LFRT OSEMs, respectively (Fil refers to this as just "ITMX MO/RO" 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_S1000275_ITMX_M0R0_LFRTLFRT_20250703.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     M0       S1000275         CH1                LF           0.0963:5.27     120           zpk([5.27],[0.0963],1,"n")
         M0                        CH2                RT           0.0950:5.19     120           zpk([5.19],[0.0950],1,"n")
         R0                        CH3                LF           0.0960:5.26     120           zpk([5.26],[0.0960],1,"n")
         R0                        CH4                RT           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/

See above comment LHO:85626 regarding the intentional exclusion of transimpedance gain in the foton design string.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 14:36, Tuesday 08 July 2025 (85633)
Link 

Here's the characterization data and fit results for  S1100090 , assigned to ITMX R0's F1F2F3SD OSEMs (Fil refers to this as just "ITMX RO" 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_S1100090_ITMX_R0_F1F2F3SD_20250703.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     R0       S1100090         CH1                F1           0.0945:5.16     120.25        zpk([5.16],[0.0945],1,"n")
                                   CH2                F2           0.0963:5.26     120.00        zpk([5.26],[0.0963],1,"n")
                                   CH3                F3           0.0977:5.34     120.00        zpk([5.34],[0.0977],1,"n")
                                   CH4                SD           0.0950:5.19     120.00        zpk([5.19],[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/Scripts/

See above comment LHO:85626 regarding the intentional exclusion of transimpedance gain in the foton design string.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 14:40, Tuesday 08 July 2025 (85634)
Link 

Here's the characterization data and fit results for  S1000296 , assigned to SR2 M1's T1T2T3LF OSEMs (Fil refers to this as just "SR2 TOP" 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_S1000296_SR2_M1_T1T2T3LF_20250703.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
SR2      M1       S1000296         CH1                T1           0.0955:5.22     122.00        zpk([5.22],[0.0955],1,"n")
                                   CH2                T2           0.0960:5.25     121.75        zpk([5.25],[0.0960],1,"n")
                                   CH3                T3           0.0969:5.28     122.25        zpk([5.28],[0.0969],1,"n")
                                   CH4                LF           0.0929:5.06     121.50        zpk([5.06],[0.0929],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/

See above comment LHO:85626 regarding the intentional exclusion of transimpedance gain in the foton design string.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 14:43, Tuesday 08 July 2025 (85635)
Link 

Here's the characterization data and fit results for  S1100067 , assigned to SR2 M1's RTSDxxxx OSEMs (Fil refers to this as just "SR2 RT/SD" 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_S1100067_SR2_M1_RTSDxxxx_20250703.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
SR2      M1       S1100067         CH1                RT           0.0977:5.35     120           zpk([5.35],[0.0977],1,"n")
                                   CH2                SD           0.0975:5.34     120           zpk([5.34],[0.0975],1,"n")
                                   CH3                xx           0.0959:5.25     120           zpk([5.25],[0.0959],1,"n")
                                   CH4                xx           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/

See above comment LHO:85626 regarding the intentional exclusion of transimpedance gain in the foton design string.
Non-image files attached to this comment