Correcting photon counts due to detector pile up
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چکیده
Where B is the ratio variance to average, p is the after pulsing probability, I is the intensity in photon counts/s and t is the dead time. Ignoring for the moment the after pulsing effect, in the absence of other effects, the value of B will decrease linearly with the intensity with a slope given by 2t. The following graph is an example for the expected changes in B as a function of intensity for the avalanche photo detector (APD) with a dead time of 50 ns. We assume a sampling time of 8 us. This is typical of our mode of data acquisition.
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