Nonlinear physics and energetic particle transport features of the beam-plasma instability

Nakia Carlevaro, Matteo V. Falessi, Giovanni Montani, Fulvio Zonca

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Abstract

In this paper we study transport features of a one-dimensional beam-plasma system in the presence of multiple resonances. As a model description of the general problem of a warm energetic particle beam, we assume η cold supra-thermal beams and investigate the self-consistent evolution in the presence of the complete spectrum of nearly degenerate Langmuir modes. A qualitative transport estimation is obtained by computing the Lagrangian Coherent Structures of the system on given temporal scales. This leads to the splitting of the phase space into regions where the local transport processes are relatively faster. The general theoretical framework is applied to the case of the nonlinear dynamics of two cold beams, for which numerical simulation results are illustrated and analysed.
Original languageEnglish
Article number495810515
Pages (from-to)-
JournalJournal of Plasma Physics
Volume81
Issue number5
DOIs
Publication statusPublished - 1 Oct 2015
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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