EPJ Web of Conferences (Jan 2024)

Thermal moderator-reflector assembly for HBS

  • Rücker Ulrich,
  • Pechenizkiy Ivan,
  • Li Jingjing,
  • Vezhlev Egor,
  • Zakalek Paul,
  • Voigt Jörg,
  • Gutberlet Thomas,
  • Brückel Thomas

DOI
https://doi.org/10.1051/epjconf/202429805008
Journal volume & issue
Vol. 298
p. 05008

Abstract

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The thermal moderator is the key component in a research neutron source to convert the primary neutrons which typically have energies in the MeV regime into useful neutrons for investigations with energies well below 1 eV. In the case of a HiCANS as HBS, the thermal moderator has to be optimized according to the compact target size and to the proton pulse lengths at individual target stations. Here, the details of a thermal moderator design serving up to 12 instruments at a target station and its neutronic performance are presented. The thermal moderator consists of a complex aluminium vessel filled with light water as moderator material containing 12 thin-walled extraction channels arranged in 2 levels.