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@INPROCEEDINGS{Schumann:153642,
      author       = {Schumann, Manuel and Engels, Ralf and Frank, M and
                      Furletova, Julia and Havenith, Andreas and Kemmerling,
                      Günter and Kettler, John and Mauerhofer, Eric and
                      Schitthelm, Oliver and Vasques, R.},
      title        = {{D}etector {D}evelopment for {N}eutron {I}maging {S}ystem
                      for {R}adioactive-{W}aste {A}nalysis ({NISRA}) with 14
                      {M}e{V} {N}eutrons},
      reportid     = {FZJ-2014-03147},
      year         = {2014},
      abstract     = {Radioactive waste has to undergo a process of quality
                      checking in order to check its conformance with national
                      regulations prior to its transport, intermediate storage and
                      final disposal. Within the quality checking of radioactive
                      waste packages non-destructive assays are required to
                      characterize their radiotoxic and chemotoxic contents. In a
                      cooperation framework Forschungszentrum Jülich, RWTH Aachen
                      University and the Siemens AG are studying the feasibility
                      of a compact Neutron Imaging System for Radioactive waste
                      Analysis (NISRA) using 14 MeV neutrons produced by a neutron
                      generator. Fast neutron imaging is a promising technique to
                      assay large and dense items providing in complementarity to
                      photon imaging additional information on the presence of
                      structures in radioactive waste packages. However due to the
                      low neutron emission of neutron generators $(10^8$ to
                      $10^10$ n/s in 4Pi) the challenging task resides in the
                      development of an imaging detector (readout detector and
                      neutron converter) with a high counting efficiency, a low
                      sensitivity to gamma radiation and a resolution sufficient
                      for the purpose. In this study two different readout
                      detectors are studied. The first one is a large amorphous
                      silicon flat panel and the second is a photomultiplier based
                      detector with crossed wavelength shifting fibres. For both
                      readout detectors the same type of neutron converter a
                      simple plastic scintillator or a polypropylene resin mixed
                      with ZnS as scintillation material is considered. The
                      performance of the two detection systems are presented and
                      compared. Furthermore some results of Monte-Carlo
                      simulations for their optimization with respect to different
                      neutron converter types are given.},
      month         = {Oct},
      date          = {2014-10-05},
      organization  = {10th World Conference on Neutron
                       Radiography, Grindelwald (Switzerland),
                       5 Oct 2014 - 10 Oct 2014},
      cin          = {IEK-6 / ZEA-2},
      cid          = {I:(DE-Juel1)IEK-6-20101013 / I:(DE-Juel1)ZEA-2-20090406},
      pnm          = {142 - Safety Research for Nuclear Waste Disposal (POF2-142)
                      / HITEC - Helmholtz Interdisciplinary Doctoral Training in
                      Energy and Climate Research (HITEC) (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF2-142 / G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)1},
      url          = {https://juser.fz-juelich.de/record/153642},
}