EPJ Web of Conferences (Jan 2017)

Recent H majority inverted radio frequency heating scheme experiments in JET-ILW

  • Van Eester Dirk,
  • Lerche Ernesto,
  • Kazakov Yevgen,
  • Jacquet Philippe,
  • Baranov Yuri,
  • Bobkov Volodymyr,
  • Crombé Kristel,
  • Czarnecka Agata,
  • Dumont Remi,
  • Dumortier Pierre,
  • Eriksson Jacob,
  • Giacomelli Luca,
  • Giroud Carine,
  • Goniche Marc,
  • Hellesen Carl,
  • Kiptily Vasily,
  • Krawczyk Natalia,
  • Koskela Tuomas,
  • Nave Filomena,
  • Nocente Massimo,
  • Ongena Jef,
  • Santala Marko,
  • Salewski Mirko,
  • Schneider Mireille,
  • Weisen Henri

DOI
https://doi.org/10.1051/epjconf/201715703061
Journal volume & issue
Vol. 157
p. 03061

Abstract

Read online

Inverted 3He and D ion cyclotron minority heating scenarios were recently tested in JET-ILW. They confirm the good heating efficiency at low concentrations of ∼3%. The 3He minority heating scheme is only modestly affected by the change from a carbon (JET-C) to a Beryllium (JET-ILW) wall but unlike what was the case in JET-C, the intrinsic Be ions D-like particles in terms of charge-over-mass ratio do not prevent the D (or 4He) minority regime from being exploited. Direct and indirect evidence of the existence of fast particle subpopulations was found in both cases.