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Modeling crosstalk in silicon photomultipliers

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Gallego, L. and Rosado Vélez, Jaime and Arqueros Martínez, Fernando (2013) Modeling crosstalk in silicon photomultipliers. Journal of instrumentation, 8 . ISSN 1748-0221

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Official URL: http://dx.doi.org/10.1088/1748-0221/8/05/P05010




Abstract

Optical crosstalk seriously limits the photon-counting resolution of silicon photomultipliers. In this work, realistic analytical models to describe the crosstalk effects on the response of these photodetectors are presented and compared with experimental data. The proposed models are based on the hypothesis that each pixel of the array has a finite number of available neighboring pixels to excite via crosstalk. Dead-time effects and geometrical aspects of the propagation of crosstalk between neighbors are taken into account in the models for different neighborhood configurations. Simple expressions to account for crosstalk effects on the pulse-height spectrum as well as to evaluate the excess noise factor due to crosstalk are also given. Dedicated measurements were carried out under both dark-count conditions and pulsed illumination. Moreover, the influence of afterpulsing on the measured pulse-height spectrum was studied, and a measurement of the recovery time of pixels was reported. High-resolution pulse-height spectra were obtained by means of a detailed waveform analysis, and the results have been used to validate our crosstalk models.


Item Type:Article
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© 2013 IOP Publishing Ltd and Sissa Medialab srl.
This work has been supported by the Spanish Ministerio de Ciencia e Innovacion (FPA2009-07772 and CONSOLIDER CPAN CSD2007-42) and Universidad Complutense de Madrid (UCM 2011: GR35/10-A-910600).

Uncontrolled Keywords:Pixel photon counters; Emission; Number; Talk.
Subjects:Sciences > Physics > Nuclear physics
ID Code:32517
Deposited On:28 Jul 2015 09:40
Last Modified:10 Dec 2018 14:58

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