Analytical models of probability distribution and excess noise factor of Solid State Photomultiplier signals with crosstalk

Details Analytical models of probability distribution and excess noise factor of Solid State Photomultiplier signals with crosstalk Analytical models of probability distribution and excess noise factor of Solid State Photomultiplier signals with crosstalk

2011-09-09

arxiv.org/abs/1109.2014v2

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Physics

Instrumentation and Detectors

10 pages, 2 tables, 3 figures, Reported at 6th International Conference on "New Developments In Photodetection - NDIP11"

Scientific paper

10.1016/j.nima.2011.11.086

Silicon Photomultipliers (SiPM), also so-called Solid State Photomultipliers (SSPM), are based on Geiger mode avalanche breakdown limited by strong negative feedback. SSPM can detect and resolve single photons due to high gain and ultra-low excess noise of avalanche multiplication in this mode. Crosstalk and afterpulsing processes associated with the high gain introduce specific excess noise and deteriorate photon number resolution of the SSPM. Probabilistic features of these processes are widely studied because of its high importance for the SSPM design, characterization, optimization and application, but the process modeling is mostly based on Monte Carlo simulations and numerical methods. In this study, crosstalk is considered to be a branching Poisson process, and analytical models of probability distribution and excess noise factor (ENF) of SSPM signals based on the Borel distribution as an advance on the geometric distribution models are presented and discussed. The models are found to be in a good agreement with the experimental probability distributions for dark counts and a few photon spectrums in a wide range of fired pixels number as well as with observed super-linear behavior of crosstalk ENF.

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