EPJ Web of Conferences (Jan 2019)

Design of the magnet system of the neutron decay facility PERC

  • Wang Xiangzun,
  • Ziener Carmen,
  • Abele Hartmut,
  • Bodmaier Stefan,
  • Dubbers Dirk,
  • Erhart Jaqueline,
  • Hollering Alexander,
  • Jericha Erwin,
  • Klenke Jens,
  • Fillunger Harald,
  • Heil Werner,
  • Klauser Christine,
  • Konrad Gertrud,
  • Lamparth Max,
  • Lauer Thorsten,
  • Klopf Michael,
  • Maix Reinhard,
  • Märkisch Bastian,
  • Mach Wilfried,
  • Mest Holger,
  • Moser Daniel,
  • Pethoukov Alexander,
  • Raffelt Lukas,
  • Rebrova Nataliya,
  • Roick Christoph,
  • Saul Heiko,
  • Schmidt Ulrich,
  • Soldner Torsten,
  • Virot Romain,
  • Zimmer Oliver,

DOI
https://doi.org/10.1051/epjconf/201921904007
Journal volume & issue
Vol. 219
p. 04007

Abstract

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The PERC (Proton and Electron Radiation Channel) facility is currently under construction at the research reactor FRM II, Garching. It will serve as an intense and clean source of electrons and protons from neutron beta decay for precision studies. It aims to contribute to the determination of the Cabibbo-Kobayashi-Maskawa quark-mixing element Vud from neutron decay data and to search for new physics via new effective couplings. PERC's central component is a 12 m long superconducting magnet system. It hosts an 8 m long decay region in a uniform field. An additional high-field region selects the phase space of electrons and protons which can reach the detectors and largely improves systematic uncertainties. We discuss the design of the magnet system and the resulting properties of the magnetic field.