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@ARTICLE{Kumar:891110,
      author       = {Kumar, S. and Herzkamp, Matthias and van Waasen, S.},
      title        = {{N}onlinearity {S}imulation of {D}igital {S}i{PM}
                      {R}esponse for {I}nhomogeneous {L}ight},
      journal      = {IEEE transactions on nuclear science},
      volume       = {68},
      number       = {3},
      issn         = {1558-1578},
      address      = {New York, NY},
      publisher    = {IEEE},
      reportid     = {FZJ-2021-01371},
      pages        = {354 - 358},
      year         = {2021},
      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.},
      cin          = {ZEA-2},
      ddc          = {620},
      cid          = {I:(DE-Juel1)ZEA-2-20090406},
      pnm          = {2171 - Biological and environmental resources for
                      sustainable use (POF4-217)},
      pid          = {G:(DE-HGF)POF4-2171},
      experiment   = {EXP:(DE-MLZ)TREFF-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000631201300011},
      doi          = {10.1109/TNS.2021.3049675},
      url          = {https://juser.fz-juelich.de/record/891110},
}