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@PHDTHESIS{Kumar:891878,
      author       = {Kumar, Shashank},
      title        = {{A}pplication of {S}ilicon {P}hotomultipliers in {N}eutron
                      {D}etectors},
      volume       = {233},
      school       = {Universität Duisburg},
      type         = {Dissertation},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2021-01791},
      isbn         = {978-3-95806-537-6},
      series       = {Schriften des Forschungszentrums Jülich. Reihe
                      Schlüsseltechnologien / Key Technologies},
      pages        = {xxvi, 157 S.},
      year         = {2021},
      note         = {Universität Duisburg, Diss., 2021},
      abstract     = {Advancement in the development of semiconductor
                      photodetectors have led to substitution Tube (PMT)
                      technology by solid state devices in many applications.
                      Silicon Photomultipliers (SiPM) are solid-state
                      photodetectors with a gain similar to PMT and that have
                      several advantages over the PMTs like low operating voltages
                      and insensitivity to magnetic fields. However, concerns of
                      radiation damage induced in Silicon due to neutron radiation
                      required a deeper understanding in order the SiPMs to become
                      a suitable technology for neutron detector systems. This
                      work provides an insight into effects of cold neutron
                      irradiation on the important macroscopic characteristics
                      (dark count rate (DCR), photon detection efficiency (PDE)
                      and timing resolution (TR)) of SiPMs and its quantification
                      for two analog samples manufactured respectively by
                      $\textit{SensL - ON Semiconductor and Hamamatsu Photonics}$,
                      and one digital SiPM (Philips Digital Photon Counting, PDPC)
                      from $\textit{Koninklijke Philips N.V.}$ Further, it
                      describes the development of a large cold/thermal neutron
                      scintillation detector prototype, with an active area of
                      13.6 cm × 13.6 cm, utilizing the digital SiPM (PDPC)
                      modules and a $^{6}$Li glass scintillator. The goal of the
                      development is to have a neutron (5 $\mathring{A}$)
                      detection efficiency of > 75 \%, a possible count rate of >
                      2kcps/cm$^{2}$, and a spatial resolution of minimum1mm × 1
                      mm. In order to achieve the targeted spatial resolution a
                      light guide was introduced between the SiPM array and the
                      scintillator glass. Geant4 simulations were performed in
                      advance for optimization of the setup. The simulation
                      results were verified by comparing simulation data with
                      measurement results obtained at the research reactor BER-II
                      of HZB Berlin and FRM-II of TU Munich in Garching.
                      Additionally, the overall performance of the detector
                      prototype is evaluated, which finds the prototype to exceed
                      (neutron detection efficiency > 95 \%, 100 kcps/cm$^{2}$
                      count rate and 1mm × 1mm spatial resolution) the specified
                      goals. Furthermore, customized position reconstruction
                      algorithms were developed, based on comparison of simulation
                      and measurement data, and implemented for the targeted
                      neutron detection resolution with a precision of 1 mm.
                      Subsequently, the efficacy of the algorithms were compared
                      for the given detector prototype.},
      cin          = {ZEA-2},
      cid          = {I:(DE-Juel1)ZEA-2-20090406},
      pnm          = {899 - ohne Topic (POF4-899)},
      pid          = {G:(DE-HGF)POF4-899},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      urn          = {urn:nbn:de:0001-2021052749},
      url          = {https://juser.fz-juelich.de/record/891878},
}