Slab-geometry surface waves on steep gradients and the origin of related numerical issues in a variety of ICRF codes

EUROfusion MST1 Team

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

In the ion cyclotron range of frequencies, electromagnetic surface waves are physically relevant for wave-filament interactions, parasitic edge losses and sheath-plasma waves. They are also important numerically, where non-physical surface waves may occur as side effects of slab-geometry approximations. We give new, completely general, mathematical techniques to construct dispersion relations for electromagnetic surface waves between any two media, isotropic or anisotropic, and first-order corrections for when the material interface is steep but continuous. We discuss numerical issues (localized non-convergence, undesired power generation) that arise in numerical calculations due to the presence of surface waves.

Original languageEnglish
Article number905870405
JournalJournal of Plasma Physics
Volume87
Issue number4
DOIs
StatePublished - Aug 2021
Externally publishedYes

Funding

We acknowledge fruitful discussions with S. Shiraiwa and N. Bertelli (PPPL), and R. Bilato and M. Usoltceva (IPP Garching). This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 and 2019-2020 under grant agreement no. 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission. We acknowledge fruitful discussions with S. Shiraiwa and N. Bertelli (PPPL), and R. Bilato and M. Usoltceva (IPP Garching). This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014–2018 and 2019–2020 under grant agreement no. 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission.

Keywords

  • plasma simulation
  • plasma waves

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