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@INPROCEEDINGS{Schmidt:1017357,
      author       = {Schmidt, Norberto and Shabani, Doruntin and Li, Jingjing
                      and Dawidowski, Javier and Mauerhofer, Eric and Gutberlet,
                      Thomas and Brückel, Thomas},
      title        = {{D}evelopment of an {E}pithermal and {F}ast {N}eutrons},
      reportid     = {FZJ-2023-04067},
      year         = {2023},
      abstract     = {The High Brilliance Neutron Source (HBS) project aims to
                      develop a High-Current Accelerator-driven Neutron Source
                      (HiCANS) for neutron scattering, analytics, and imaging.
                      Fast neutrons with an average energy of 0.5 MeV will be
                      generated by the interaction of 70 MeV, 100 mA proton beam
                      with a tantalum target. Three target-moderator-reflector
                      (TMR) stations will operate at different frequencies to
                      deliver individually tailored beam characteristics for each
                      instrument. For the low (24 Hz, 667 us) and medium (96 Hz,
                      167 us) frequency stations, the neutrons will be slowed down
                      into the thermal and cold energy regimes, respectively, by
                      corresponding moderator systems. In addition, a
                      high-frequency mode can be adopted for a short pulse (~4-8
                      us) in one of the medium-frequency stations using an
                      appropriate chopper system.For this last case, it is desired
                      to have an optimal epithermal and fast neutron flux, in
                      order to carry out different experiments such as prompt
                      gamma analysis based on inelastic neutron scattering
                      (PGAINS), and resonance neutron imaging (RNI). These
                      instruments will be well-suited for preservation of cultural
                      heritage, characterization of archaeological objects,
                      materials science, and study of large and dense objects such
                      as batteries or aeronautical components.Some of the most
                      essential neutronic parameters for this kind of experiments
                      are the integral epithermal neutron flux, the ratio over
                      integral fast neutron flux, and the energy versus time
                      neutron distribution. For the optimization of these
                      different parameters, simulations with the PHITS Monte Carlo
                      code were performed.The objective of this work is the
                      presentation of the conceptual design of an epithermal and
                      fast neutron TMR unit for the HBS project, considering the
                      choice of the coolant, moderator, and reflector materials.},
      month         = {Oct},
      date          = {2023-10-16},
      organization  = {10th Annual Meeting of the Union for
                       Compact Accelerator-driven Neutron
                       Sources, Budapest (Hungary), 16 Oct
                       2023 - 19 Oct 2023},
      subtyp        = {Invited},
      cin          = {JCNS-2 / PGI-4 / JCNS-HBS / JARA-FIT},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      I:(DE-Juel1)JCNS-HBS-20180709 / $I:(DE-82)080009_20140620$},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G4 - Jülich Centre for Neutron
                      Research (JCNS) (FZJ) (POF4-6G4)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G4},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://juser.fz-juelich.de/record/1017357},
}