EPJ Web of Conferences (Jan 2017)

Modelling RF-plasma interaction in ECR ion sources

  • Mascali David,
  • Torrisi Giuseppe,
  • Galatà Alessio,
  • Sorbello Gino,
  • Castro Giuseppe,
  • Celona Luigi,
  • Lega Lorenzo,
  • Leonardi Ornella,
  • Mazzaglia Maria,
  • Naselli Eugenia,
  • Neri Lorenzo,
  • Gammino Santo

DOI
https://doi.org/10.1051/epjconf/201715703054
Journal volume & issue
Vol. 157
p. 03054

Abstract

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This paper describes three-dimensional self-consistent numerical simulations of wave propagation in magnetoplasmas of Electron cyclotron resonance ion sources (ECRIS). Numerical results can give useful information on the distribution of the absorbed RF power and/or efficiency of RF heating, especially in the case of alternative schemes such as mode-conversion based heating scenarios. Ray-tracing approximation is allowed only for small wavelength compared to the system scale lengths: as a consequence, full-wave solutions of Maxwell-Vlasov equation must be taken into account in compact and strongly inhomogeneous ECRIS plasmas. This contribution presents a multi-scale temporal domains approach for simultaneously including RF dynamics and plasma kinetics in a “cold-plasma”, and some perspectives for “hot-plasma” implementation. The presented results rely with the attempt to establish a modal-conversion scenario of OXB-type in double frequency heating inside an ECRIS testbench.