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Neutronic Calculations for the Shielding Design of the VESPA Instrument at the European Spallation Source

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Abstract

The European Spallation Source is being built in Lund, Sweden and it’s planned to be the brightest pulsed spallation source for thermal and cold neutrons (<1 eV). Neutrons will be produced by a 2 GeV accelerated proton beam hitting a tungsten target wheel, then they are moderated by liquid hydrogen and water based moderator system and delivered to 42 beam-ports. Neutrons are transported via reflections to a set of instruments connected to the beam-ports through neutron guides. Undesired fast neutrons can cause a radiation safety issue, since they can find their way down the beam-lines and thus generate a large dose. A designed shielding structure is needed to minimize such effect during the beam at the target phase. We present the results of neutronic calculations to optimize the guide shielding for the VESPA instrument.

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Author information

Authors and Affiliations

  1. Dipartimento di Fisica, Università della Calabria, Rende, 87036, Italy

    G. Scionti & R. G. Agostino

  2. Consiglio Nazionale delle Ricerche–Nanotec UOS, Cosenza, 87036, Italy

    R. G. Agostino

  3. Consiglio Nazionale delle Ricerche–Istituto di Fisica Applicata “N. Carrara”, Sesto Fiorentino (FI), 50019, Italy

    D. Colognesi

  4. Dipartimento di Fisica Università degli Studi di Milano-Bicocca, Milan, 20133, Italy

    G. Gorini

  5. European Spallation Source ERIC, Lund, 225 92, Sweden

    M. Hartl & V. Santoro

  6. Dipartimento di Fisica, Università degli Studi di Roma Tor Vergata, Centro NAST, 00133, Roma, Italy

    R. Senesi

  7. Consiglio Nazionale delle Ricerche–Istituto per i Processi Chimico Fisici, Sezione di Messina, Messina, 98158, Italy

    R. Senesi

Authors
  1. G. Scionti
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  2. R. G. Agostino
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  3. D. Colognesi
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  4. G. Gorini
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  5. M. Hartl
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  6. V. Santoro
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  7. R. Senesi
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Corresponding author

Correspondence to G. Scionti.

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Scionti, G., Agostino, R.G., Colognesi, D. et al. Neutronic Calculations for the Shielding Design of the VESPA Instrument at the European Spallation Source. J. Surf. Investig. 14 (Suppl 1), S190–S194 (2020). https://doi.org/10.1134/S1027451020070411

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  • DOI: https://doi.org/10.1134/S1027451020070411

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