Article, 2023

Design of Temporary Beam Stops and Bunker Wall Plugs at ESS

Nuclear Science and Engineering, ISSN 1943-748X, 0029-5639, Volume 198, 2, Pages 411-422, 10.1080/00295639.2023.2194202

Contributors

Chambon, Amalia 0000-0002-3733-3226 (Corresponding author) [1] Zanini, Luca 0000-0002-0489-0624 [2]

Affiliations

  1. [1] Technical University of Denmark
  2. [NORA names: DTU Technical University of Denmark; University; Denmark; Europe, EU; Nordic; OECD];
  3. [2] European Spallation Source ERIC
  4. [NORA names: Sweden; Europe, EU; Nordic; OECD]

Abstract

The European Spallation Source (ESS) is currently under construction in Lund, Sweden. At the time of the first beam-on-target, foreseen in 2025, a first set of neutron scattering instruments will be commissioned, in addition to a test beamline for characterization of the source. For every planned beamline, all optics components will already have been installed in the monolith shielding surrounding the spallation target, but instruments will still be under construction in the neutron bunker area. Blocks of shielding, referred to as temporary beam stops or wall plugs, are then required to capture neutrons that will come out through the bunker wall feedthroughs during operation. This paper presents the results of parametric studies carried out to design temporary beam stops to assess the possibilities of reducing the weight and cost of such components and also to investigate the shielding efficiency of a wall plug as an alternative solution.

Keywords

European, European Spallation Source, Lund, Lund, Sweden, Spallation Source, Sweden, alternative solution, area, beam, beam stop, beamline, block, bunker, bunker area, bunker wall, characterization, components, construction, cost, design, efficiency, instrument, monolithic shield, neutron, neutron scattering instruments, operation, optical components, optics, parametric study, plug, possibilities, results, results of parametric studies, scattering instruments, shielding, shielding efficiency, solution, source, spallation, spallation target, stop, study, target, test, test beamline, wall, wall plug, weight

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