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@INPROCEEDINGS{Chen:1017356,
      author       = {Chen, Junyang and Voigt, Jörg and Vezhlev, Egor and
                      Zakalek, Paul and Rücker, Ulrich and Li, Jingjing and
                      Gutberlet, Thomas and Brückel, Thomas},
      title        = {{I}nvestigation of {P}ancake-like {M}oderator-{R}eflector
                      {S}tructure for the {H}igh {B}rilliance {N}eutron {S}ource
                      ({HBS})},
      reportid     = {FZJ-2023-04066},
      year         = {2023},
      abstract     = {The High Brilliance Neutron Source (HBS) project is
                      developing a high-current accelerator-driven neutron source
                      (HiCANS) to maintain a healthy neutron landscape in Europe.
                      Despite the lower primary neutron yield of the nuclear
                      reactions compared to reactor or spallation neutron sources,
                      HiCANS achieve a competitive neutron brightness by a compact
                      moderator and reflector design, which makes a large fraction
                      of the primary neutron spectrum available for applications.
                      The spectral and temporal, i.e. frequency and pulse length,
                      characteristics of the neutron pulse are tailored to the
                      instruments hosted at a target station.Based on the
                      ‘pancake’ and ‘butterfly’ moderator geometries
                      developed for the European Spallation Source (ESS), we
                      investigate a pancake-like structure by means of Monte Carlo
                      simulations involving multi-parameter optimization routines.
                      By increasing the interface area, we try to improve the
                      coupling between thermal and cryogenic moderator. The
                      extraction surfaces of the applied pancake-like geometry
                      achieve a cold neutron flux of $85\%-87\%$ of a cylindrical
                      para H2 moderator (length= 10 cm, diameter = 2.4 cm) with
                      ideal coupling. The flux through the thermal extraction
                      surfaces reaches $70\%-79\%$ in comparison to an ideal case
                      with just a single extraction channel looking at the thermal
                      flux maximum in the center of the thermal moderator. The
                      optimized structure with up to six extraction channels looks
                      therefore very promising for target stations that serve a
                      large number of thermal and cold instruments. At this
                      conference, we will present the results of our study of this
                      moderator-reflector assembly. [1] X. Y. Author, Neutron
                      News, 22, 7 (2011)},
      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 / JCNS-FRM-II},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      I:(DE-Juel1)JCNS-HBS-20180709 / $I:(DE-82)080009_20140620$ /
                      I:(DE-Juel1)JCNS-FRM-II-20110218},
      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/1017356},
}