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High energy particle background at neutron spallation sources and possible solutions

Författare

  • Nataliia Cherkashyna
  • Kalliopi Kanaki
  • T. Kittelmann
  • U. Filges
  • Pascale Deen
  • K. Herwig
  • G. Ehlers
  • G. Greene
  • J. Carpenter
  • Robert Connatser
  • Richard Hall-Wilton
  • Phillip Bentley

Summary, in English

Modern spallation neutron sources are driven by proton beams similar to GeV energies. Whereas low energy particle background shielding is well understood for reactors sources of neutrons (similar to 20 MeV), for high energies (100s MeV to multiple GeV) there is potential to improve shielding solutions and reduce instrument backgrounds significantly. We present initial measured data on high energy particle backgrounds, which illustrate the results of particle showers caused by high energy particles from spallation neutron sources. We use detailed physics models of different materials to identify new shielding solutions for such neutron sources, including laminated layers of multiple materials. In addition to the steel and concrete, which are used traditionally, we introduce some other options that are new to the neutron scattering community, among which there are copper alloys as used in hadronic calorimeters in high energy physics laboratories. These concepts have very attractive energy absorption characteristics, and simulations predict that the background suppression could be improved by one or two orders of magnitude. These solutions are expected to be great benefit to the European Spallation Source, where the majority of instruments are potentially affected by high energy backgrounds, as well as to existing spallation sources.

Publiceringsår

2014

Språk

Engelska

Sidor

012013-012013

Publikation/Tidskrift/Serie

International Workshop on Neutron Optics and Detectors (NOP&D 2013) 2–5 July 2013, Munich, Germany

Volym

528

Dokumenttyp

Konferensbidrag

Förlag

IOP Publishing

Ämne

  • Natural Sciences
  • Physical Sciences

Conference name

International Workshop on Neutron Optics and Detectors (NOP&D)

Conference date

2013-07-02 - 2013-07-05

Conference place

Munich, Germany

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1742-6588
  • ISSN: 1742-6596