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Section: H2
Task: CDS
Plot of 3 months of Bit switching.
There are certainly bits switching on all of the channels.
Marked nad noticable increase in bit switching on May 22nd for ETMY which I believe is a known issue.
FranciscoL, TonyS
Summary: We connected a BNC from the "Out Mon" of D1300599 to "In 2" of D1400423. The channel H1:CAL-PCALX_OFS_AOM_DRIVE_MON_OUT16 now plots what the AOM is doing. Problem solved.
Earlier today I went to track where in the chain of connections the InLoopOut signal was "lost" (I made that claim in 85753). All the signals of InLoopOut were working all the way out to the TCS rack. However, after a closer look on all the schematics for the Pcal and the TCS boards, I noticed that I was tracking the wrong channel. In other words, the InLoopOut channel was not the problematic channel -- this would otherwise be a super urgent matter, as the InLoopOut is the signal coming straight from the OFS PD -- but it was the AOM Mon channel (for the interested reader, look at D1300226V13 --> page 3 --> X1-TCS-C1-4 --> second (top to bottom) 9-pi D-Sub Male output, to find the channel). At the time of realizing my mistake, the maintenance period was long over, so I left it as a pending task for our next visit to EX.
The world gifted me with very high seismic activity and Tony and I finally finished the problem by connecting the BNC that was missing according to D1300226 schematic and stated in the summary. Attached are screenshots of the ndscope before (earlier today, as I was looking for the problem) and after plugging the BNC in the chassis, in their respective order. The change is seen in the green trace on the second (top to bottom) plot.
Tagging CDS so we are all aware that the problem was solved and it is concluded now.
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.
1) Dust Monitor Check Notifications for LVEA5 & LAB2
Ran the "check_dust_monitors_are_working" script the last two mornings and received notifications for the following:
2) Access System "Flashing Doors"
3) LHO Control Room Screenshots & FOMs
TITLE: 07/14 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Wind/Aligning
INCOMING OPERATOR: Tony
SHIFT SUMMARY: The TCSY laser tripped off then we lost lock in the last hour, the winds rose to around 40mph after this. H1 is trying to do an intial alignment as of 05:00 UTC as the DRMI flashes weren't great, the winds have calmed a bit so hopefully it goes well and the arms can stay locked.
LOG: No log.
$python3 generate_measurement_data.py --WS PS4 --date 2025-06-24Reading in config file from python file in scripts../../../Common/O4PSparams.yamlPS4 rho, kappa, u_rel on 2025-06-24 corrected to ES temperature 299.2 K :-4.70052522573445 -0.0002694340454223 2.66508565972755e-05Copying the scripts into tD directory...Connected to nds.ligo-wa.caltech.edumartel runreading data at start_time: 1435423390reading data at start_time: 1435423770reading data at start_time: 1435424085reading data at start_time: 1435424665reading data at start_time: 1435425020reading data at start_time: 1435425335reading data at start_time: 1435425435reading data at start_time: 1435426070reading data at start_time: 1435426405Ratios: -0.46199911560110457 -0.4661225769446798writing nds2 data to filesfinishing writingBackground Values:bg1 = 9.235188; Background of TX when WS is at TXbg2 = 5.284960; Background of WS when WS is at TXbg3 = 9.145166; Background of TX when WS is at RXbg4 = 5.413446; Background of WS when WS is at RXbg5 = 9.219525; Background of TXbg6 = 0.642557; Background of RXThe uncertainty reported below are Relative Standard Deviation in percentIntermediate RatiosRatioWS_TX_it = -0.461999;RatioWS_TX_ot = -0.466123;RatioWS_TX_ir = -0.455904;RatioWS_TX_or = -0.461457;RatioWS_TX_it_unc = 0.092717;RatioWS_TX_ot_unc = 0.098001;RatioWS_TX_ir_unc = 0.097458;RatioWS_TX_or_unc = 0.092076;Optical EfficiencyOE_Inner_beam = 0.986610;OE_Outer_beam = 0.990080;Weighted_Optical_Efficiency = 0.988345;OE_Inner_beam_unc = 0.062698;OE_Outer_beam_unc = 0.063147;Weighted_Optical_Efficiency_unc = 0.088986;Martel Voltage fit:Gradient = 1636.767545;Intercept = 0.229197;Power Imbalance = 0.991154;Endstation Power sensors to WS ratios::Ratio_WS_TX = -1.077445;Ratio_WS_RX = -1.391120;
Ratio_WS_TX_unc = 0.058121;Ratio_WS_RX_unc = 0.042422;
========================================================================== Values for Force Coefficients ==============================================================================
Key Pcal Values :GS = -5.135100; Gold Standard Value in (V/W)WS = -4.700525; Working Standard Value
costheta = 0.988362; Angle of incidencec = 299792458.000000; Speed of LightEnd Station Values :TXWS = -1.077445; Tx to WS Rel responsivity (V/V)sigma_TXWS = 0.000626; Uncertainity of Tx to WS Rel responsivity (V/V)RXWS = -1.391120; Rx to WS Rel responsivity (V/V)sigma_RXWS = 0.000590; Uncertainity of Rx to WS Rel responsivity (V/V)
e = 0.988345; Optical Efficiencysigma_e = 0.000879; Uncertainity in Optical Efficiency
Martel Voltage fit :Martel_gradient = 1636.767545; Martel to output channel (C/V)Martel_intercept = 0.229197; Intercept of fit of Martel to output (C/V)
Power Loss Apportion :beta = 0.998895; Ratio between input and output (Beta)E_T = 0.993606; TX Optical efficiencysigma_E_T = 0.000442; Uncertainity in TX Optical efficiencyE_R = 0.994705; RX Optical Efficiencysigma_E_R = 0.000443; Uncertainity in RX Optical efficiency
Force Coefficients :FC_TxPD = 7.903342e-13; TxPD Force CoefficientFC_RxPD = 6.193451e-13; RxPD Force Coefficientsigma_FC_TxPD = 5.805084e-16; TxPD Force Coefficientsigma_FC_RxPD = 3.826232e-16; RxPD Force Coefficientdata written to ../../measurements/LHO_EndX/tD20250701/
Comment regarding the missing signal on the EX Pcal MEDM:
We noticed that H1:CAL-PCALX_OFS_DRIVE_MON was not working as expected a few weeks ago. On this expedition to make ES measurements, Dripta and I used a few breakout boards to ensure that the "OFS drive monitor" signal was coming out of the Pcal chassis and into the ADC Chassis. We confirm that there was a signal coming out of the Pcal Interface Chassis back board (D1400149V1), the DB9 output labeled "To Fast ADC", pins 1 and 6 (not the same name but, by process of elimination, we assume that "OFS drive monitor" is, in the drawing, "InLoopOut±") , so we can rule out the Pcal chassis. Due to lack of time, however, we were not able to pinpoint the step at which this signal is lost.
Tony found the next step in our hunt: Page 3 of D1300226V13 shows the ADC side of "To Fast ADC", specifically, "ADC CHAN±00" is assigned, in the drawing, to InLoopOut± . I am tagging CDS for any insight on their side. Discussions and a follow-up plan are in progress to find the signal.
WP 12640
ECR E2400330
Drawing D0901284-v5
T2500232
Today we started upgrading the SUS Sat Amps per ECR E2400330. Modification improves the whitening stage to reduce ADC noise from 0.05 to 10 Hz. The following units were replaced with modified units:
| Suspension | Old | New |
| PRM TOP | S1100067 | S1100168 |
| PRM/PR3 | S1000275 | S1100173 |
| PR3 | S1100175 | S1100183 |
| BS TOP | S1100090 | S1000291 |
| BS RT/SD | S1100155 | S1100066 |
| SR3 Top | S1000296 | S1000284 |
| SR3/SRM | S1100178 | S1000290 |
| SRM | S1100136 | S1100068 |
F. Clara, C. Gray, J. Kissel, O. Patane, M.Pirello
Here's the characterization data and fit results for S1100168, assigned to PRM M1's T1T2T3LF OSEMs (what Fil refers to as just "PRM 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_S1100168_PRM_M1_T1T2T3LF_20250630.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 M1 S1100168 CH1 T1 0.0969 : 5.30 120.10 zpk([5.3],[0.0969],1,"n") CH2 T2 0.0950 : 5.20 120.25 zpk([5.2],[0.095],1,"n") CH3 T3 0.0950 : 5.18 120.25 zpk([5.18],[0.095],1,"n") CH4 LF 0.0940 : 5.15 120.00 zpk([5.15],[0.094],1,"n") The attached plot and machine readable .txt file are also found in ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/ 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.
Here's the characterization data and fit results for S1100173 , assigned to PRM/PR3 M1's RTSD/T1T2 OSEMs (what Fil refers to as just "PRM/PR3" 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_S1100173_PRMPR3_M1_RTSDT1T2_20250630.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 PRMPR3 M1 S1100173 CH1 RT 0.0969 : 5.3 120.00 zpk([5.3],[0.0969],1,"n") CH2 SD 0.0955 : 5.22 120.00 zpk([5.22],[0.0955],1,"n") CH3 T1 0.0975 : 5.35 119.75 zpk([5.35],[0.0975],1,"n") CH4 T2 0.0975 : 5.33 120.25 zpk([5.33],[0.0975],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 LHO:85504 comment as to why an account of the fit transimpedance was not included in the foton design string gain.
Here's the characterization data and fit results for S1100183 , assigned to PR3 M1's T3LFRTSD OSEMs (what Fil refers to as just "PR3" 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_S1100183_PR3_M1_T3LFRTSD_20250630.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 PR3 M1 S1100183 CH1 T3 0.0950 : 5.19 120 zpk([5.19],[0.095],1,"n") CH2 LF 0.0945 : 5.17 120 zpk([5.17],[0.0945],1,"n") CH3 RT 0.0940 : 5.14 120 zpk([5.14],[0.094],1,"n") CH4 SD 0.0955 : 5.24 120 zpk([5.24],[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 LHO:85504 comment as to why an account of the fit transimpedance was not included in the foton design string gain.
Here's the characterization data and fit results for S1000291 , assigned to BS M1's F1F2F3LF OSEMs (what Fil refers to as just "BS 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_S1000291_BS_M1_F1F2F3LF_20250630.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 M1 S1000291 CH1 F1 0.096 : 5.19 121.50 zpk([5.19],[0.096],1,"n") CH2 F2 0.096 : 5.23 120.75 zpk([5.23],[0.096],1,"n") CH3 F3 0.096 : 5.26 120.00 zpk([5.26],[0.096],1,"n") CH4 LF 0.095 : 5.2 120.00 zpk([5.2],[0.095],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 LHO:85504 comment as to why an account of the fit transimpedance was not included in the foton design string gain.
Here's the characterization data and fit results for S1100066 , assigned to BS M1's RTSDxxxx OSEMs (with the 2x "xx" representing the unused channels not connected to anything in-vacuum. Fil refers to this as just "BS 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_S1100066_BS_M1_RTSDxxx_20250630.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 M1 S1100066 CH1 RT 0.0960 : 5.19 121.50 zpk([5.19],[0.096],1,"n") CH2 SD 0.0940 : 5.11 120.75 zpk([5.11],[0.094],1,"n") CH3 xx 0.0935 : 5.12 120.25 zpk([5.12],[0.0935],1,"n") CH4 xx 0.0965 : 5.26 120.50 zpk([5.26],[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 LHO:85504 comment as to why an account of the fit transimpedance was not included in the foton design string gain.
Here's the characterization data and fit results for S1000284 , assigned to SR3 M1's T1T2T3LF OSEMs (Fil refers to this as just "SR3 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_S1000284_SR3_M1_T1T2T3LF_20250630.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 SR3 M1 S1000284 CH1 T1 0.0960 : 5.25 120.1 zpk([5.25],[0.096],1,"n") CH2 T2 0.0950 : 5.2 120.1 zpk([5.2],[0.095],1,"n") CH3 T3 0.0960 : 5.27 120.1 zpk([5.27],[0.096],1,"n") CH4 LF 0.0945 : 5.16 120.5 zpk([5.16],[0.0945],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 LHO:85504 comment as to why an account of the fit transimpedance was not included in the foton design string gain.
Here's the characterization data and fit results for S1000290 , assigned to SR3/SRM M1's RTSD/T1T2 OSEMs (Fil refers to this as just "SR3/SRM" 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_S1000290_SR3SRM_M1_RTSDT1T2_20250630.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 SR3/SRM M1 S1000290 CH1 RD 0.0955 : 5.21 120.1 zpk([5.21],[0.0955],1,"n") CH2 SD 0.0940 : 5.13 120.5 zpk([5.13],[0.094],1,"n") CH3 T1 0.0930 : 5.07 120.5 zpk([5.07],[0.093],1,"n") CH4 T2 0.0950 : 5.2 120.1 zpk([5.2],[0.095],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 LHO:85504 comment as to why an account of the fit transimpedance was not included in the foton design string gain.
Here's the characterization data and fit results for S1100068 , assigned to SRM M1's T3LFRTSD OSEMs (Fil refers to this as just "SRM" 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_S1100068_SRM_M1_T3LFRTSD_20250630.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 M1 S1100068 CH1 T3 0.094 : 5.14 120.10 zpk([5.14],[0.094],1,"n") CH2 LF 0.095 : 5.18 120.25 zpk([5.18],[0.095],1,"n") CH3 RT 0.096 : 5.23 120.75 zpk([5.23],[0.096],1,"n") CH4 SD 0.096 : 5.29 119.00 zpk([5.29],[0.096],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 LHO:85504 comment as to why an account of the fit transimpedance was not included in the foton design string gain.
