%0 Journal Article
%A Kumar, S.
%A Herzkamp, Matthias
%A van Waasen, S.
%T Nonlinearity Simulation of Digital SiPM Response for Inhomogeneous Light
%J IEEE transactions on nuclear science
%V 68
%N 3
%@ 1558-1578
%C New York, NY
%I IEEE
%M FZJ-2021-01371
%P 354 - 358
%D 2021
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000631201300011
%R 10.1109/TNS.2021.3049675
%U https://juser.fz-juelich.de/record/891110