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Reports until 00:43, Wednesday 12 August 2015
H1 CAL (CAL)
sudarshan.karki@LIGO.ORG - posted 00:43, Wednesday 12 August 2015 (20459)
LHO EndY Pcal Calibration

Travis, Sudarshan

We calibrated the EndY photon calibrator today. We have started reporting the final calibration factors in Newtons/Volt of PD  readout as per our new calibration scheme detailed in alog # 20334. The new calibration factors compared to the the last calibration is tabulated below and is also uploaded to T1500252.

Calibration Date

TxPD (N/V)

RxPD (N/V)

20150522

1.513E-09+/- 0.80%

1.064E-09+/- 0.80%

20150811

1.524E-09 +/- 0.57%

1.056E-09 +/- 0.57%

Weighted Mean

1.520E-09

1.059E-09

A detail comparison that includes physical parameters, intermediate ratios, optical efficiency  is attached.

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