First order statistic of afterpulsing and crosstalk events in SiPMs

TL;DR

This paper introduces an order statistic method to analyze the timing of afterpulsing and crosstalk events in SiPMs, improving understanding of their temporal behavior amidst dark counts.

Contribution

It extends the model of crosstalk as a branching Poisson process to include afterpulsing, providing a new approach to extract timing information of correlated events.

Findings

Distribution of first arrival time narrows with more seeds

Model predicts timing behavior of delayed crosstalk and afterpulsing

Method enables better characterization of SiPM noise processes

Abstract

This paper briefly presents an order statistic approach to the time distribution of the first detected event after a primary avalanche breakdown from a mixture of correlated and dark counting processes. The well-known order statistic method, commonly used to describe the time resolution of scintillation detectors, is applied to the arrival times of correlated events. The established model of crosstalk as a branching Poisson process is extended to afterpulsing, and correlated events are considered starting from their seeds -- free (de-trapped or diffused) charge carriers capable of triggering secondary avalanche breakdowns. The proposed approach enables the extraction of timing information for delayed crosstalk and afterpulsing events mixed with dark counts and predicts that the distribution of the first arrival time narrows as the number of seeds increases, corresponding to a higher probability of correlated events.