Nonlinear dynamics of beta-induced Alfvén eigenmode driven by energetic particles

X. Wang, S. Briguglio, L. Chen, C. Di Troia, G. Fogaccia, G. Vlad, F. Zonca

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Abstract

Nonlinear saturation of a beta-induced Alfvén eigenmode, driven by slowing down energetic particles via transit resonance, is investigated by the nonlinear hybrid magnetohyrodynamic gyrokinetic code. Saturation is characterized by frequency chirping and symmetry breaking between co- and counter-passing particles, which can be understood as the evidence of resonance detuning. The scaling of the saturation amplitude with the growth rate is also demonstrated to be consistent with radial resonance detuning due to the radial nonuniformity and mode structure. © 2012 American Physical Society.
Original languageEnglish
Article number045401
Pages (from-to)-
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume86
Issue number4
DOIs
Publication statusPublished - 4 Oct 2012
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Statistical and Nonlinear Physics
  • Statistics and Probability

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