Journal Article

FZJ-2021-01371

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Nonlinearity Simulation of Digital SiPM Response for Inhomogeneous Light

Kumar, S. (Corresponding author)FZJ* ; Herzkamp, M.Extern* ; van Waasen, S.FZJ*

2021
IEEE New York, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/28686  doi:10.1109/TNS.2021.3049675

Abstract: Currently we are developing a neutron scintillationdetector prototype using silicon photomultipliers (SiPM) as thephotodetector. In order to reconstruct the position of single neutronevents to a better accuracy than the pixel pitch of the SiPM,a very accurate photon count is required. Each pixel consistsof 3200 micro-cells, operated in Geiger mode. A cell which isalready triggered cannot detect any following photons hittingthe cell, until it is recharged. This leads to a non-linearity in thepixel’s response for a higher photon density impinging across the pixel. Previous studies provided a correction factor to estimatethe saturation, by assuming a homogeneous photon distributiondensity and comparing it to the number of micro-cells. In ourspecific application, the photon distribution is not homogeneous,which is why we examined the influence of the homogeneity onthe saturation. In this work, we present a case study for differencein non-linearity effect for an in-homogeneous and homogeneousphoton distribution density, given the light intensity is equal.The simulation results suggest that the effect could be higher foran in-homogeneous distribution. Therefore, care must be takenwhen using the established correction factor for saturation andan analysis of the photon distribution homogeneity is necessary.

Keyword(s): Engineering, Industrial Materials and Processing (1st) ; Instrument and Method Development (2nd)

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Contributing Institute(s):

1. Zentralinstitut für Elektronik (ZEA-2)

Research Program(s):

1. 2171 - Biological and environmental resources for sustainable use (POF4-217) (POF4-217)

Experiment(s):

1. TREFF: Neutronenreflektometer (NL5S)

Appears in the scientific report 2021

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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