Resonant and non-resonant particle dynamics in Alfvén mode excitations

Fulvio Zonca, Liu Chen

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

Shear Alfvén wave excitations by energetic (E ≈ 1 MeV) ions in burning tokamak plasmas are investigated. The physical processes dominating resonant and non-resonant wave-particle interaction with fast ions are identified and discussed in various wavelength regimes. It is shown that both types of interactions depend crucially on the magnetic drift curvature coupling in conditions optimal for resonant mode excitation, which also correspond to maximized fast ion redistributions by collective oscillations. Energetic particle charge uncovering effects, viewed as (thermal) core component currents responding to the charge separation caused by large fast ion orbit widths, are further delineated in terms of the present results. © 2006 IOP Publishing Ltd.
Original languageEnglish
Pages (from-to)537 - 556
Number of pages20
JournalPlasma Physics and Controlled Fusion
Volume48
Issue number5
DOIs
Publication statusPublished - 1 May 2006
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Condensed Matter Physics
  • Nuclear and High Energy Physics

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