Today Francisco Llamas and I took PS4 down the EndY to do a run of the mill End station measurement following the instructions outlined on the T1500062 PCAL End Station Power Sensor Responsivity Ratio Measuremets: Procedures and Log .
Running the following command from a cds directory /ligo/gitcommon/Calibration/pcal/O4/ES/scripts/pcalEndstationPy
python generate_measurement_data.py --WS "PS4" --date '2024-12-10'
Reading in config file from python file in scripts
../../../Common/O4PSparams.yaml
PS4 rho, kappa, u_rel on 2024-12-10 corrected to ES temperature 298.5 K :
-4.7042776679256315 -0.0002694340454223 4.3277259408925024e-05
Copying the scripts into tD directory...
Connected to nds.ligo-wa.caltech.edu
martel run
reading data at start_time: 1422728370
reading data at start_time: 1422728815
reading data at start_time: 1422729150
reading data at start_time: 1422729720
reading data at start_time: 1422730125
reading data at start_time: 1422730470
reading data at start_time: 1422730600
reading data at start_time: 1422731280
reading data at start_time: 1422731630
Ratios: -0.5336711312890802 -0.5439438081494363
writing nds2 data to files
finishing writing
Background Values:
bg1 = 18.798280; Background of TX when WS is at TX
bg2 = 5.347941; Background of WS when WS is at TX
bg3 = 18.777599; Background of TX when WS is at RX
bg4 = 5.320714; Background of WS when WS is at RX
bg5 = 18.859360; Background of TX
bg6 = 0.059221; Background of RX
The uncertainty reported below are Relative Standard Deviation in percent
Intermediate Ratios
RatioWS_TX_it = -0.533671;
RatioWS_TX_ot = -0.543944;
RatioWS_TX_ir = -0.526984;
RatioWS_TX_or = -0.536057;
RatioWS_TX_it_unc = 0.052568;
RatioWS_TX_ot_unc = 0.055834;
RatioWS_TX_ir_unc = 0.056378;
RatioWS_TX_or_unc = 0.059744;
Optical Efficiency
OE_Inner_beam = 0.987336;
OE_Outer_beam = 0.985232;
Weighted_Optical_Efficiency = 0.986284;
OE_Inner_beam_unc = 0.041823;
OE_Outer_beam_unc = 0.044559;
Weighted_Optical_Efficiency_unc = 0.061112;
Martel Voltage fit:
Gradient = 1637.895833;
Intercept = 0.036157;
Power Imbalance = 0.981114;
Endstation Power sensors to WS ratios::
Ratio_WS_TX = -0.927975;
Ratio_WS_RX = -1.384608;
Ratio_WS_TX_unc = 0.044554;
Ratio_WS_RX_unc = 0.037548;
=============================================================
============= Values for Force Coefficients =================
=============================================================
Key Pcal Values :
GS = -5.135100; Gold Standard Value in (V/W)
WS = -4.704278; Working Standard Value
costheta = 0.988362; Angle of incidence
c = 299792458.000000; Speed of Light
End Station Values :
TXWS = -0.927975; Tx to WS Rel responsivity (V/V)
sigma_TXWS = 0.000413; Uncertainity of Tx to WS Rel responsivity (V/V)
RXWS = -1.384608; Rx to WS Rel responsivity (V/V)
sigma_RXWS = 0.000520; Uncertainity of Rx to WS Rel responsivity (V/V)
e = 0.986284; Optical Efficiency
sigma_e = 0.000603; Uncertainity in Optical Efficiency
Martel Voltage fit :
Martel_gradient = 1637.895833; Martel to output channel (C/V)
Martel_intercept = 0.036157; Intercept of fit of Martel to output (C/V)
Power Loss Apportion :
beta = 0.998844; Ratio between input and output (Beta)
E_T = 0.992544; TX Optical efficiency
sigma_E_T = 0.000303; Uncertainity in TX Optical efficiency
E_R = 0.993693; RX Optical Efficiency
sigma_E_R = 0.000304; Uncertainity in RX Optical efficiency
Force Coefficients :
FC_TxPD = 9.152911e-13; TxPD Force Coefficient
FC_RxPD = 6.219661e-13; RxPD Force Coefficient
sigma_FC_TxPD = 4.976837e-16; TxPD Force Coefficient
sigma_FC_RxPD = 3.035146e-16; RxPD Force Coefficient
data written to /ligo/gitcommon/Calibration/pcal/O4/ES/measurements/LHO_EndY/tD20250204
Beam spot picture
Martel_Voltage_test.png
WS_at_TX.png
WS_at_RX.png
WS_at_RX_BOTH_BEAMS.png
LHO_EndY_PD_ReportV5.pdf
