Mode structure symmetry breaking of energetic particle driven beta-induced Alfvén eigenmode

Z.X. Lu, X. Wang, Ph. Lauber, F. Zonca

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Abstract

The mode structure symmetry breaking of energetic particle driven Beta-induced Alfvén Eigenmode (BAE) is studied based on global theory and simulation. The weak coupling formula gives a reasonable estimate of the local eigenvalue compared with global hybrid simulation using XHMGC. The non-perturbative effect of energetic particles on global mode structure symmetry breaking in radial and parallel (along B) directions is demonstrated. With the contribution from energetic particles, two dimensional (radial and poloidal) BAE mode structures with symmetric/asymmetric tails are produced using an analytical model. It is demonstrated that the symmetry breaking in radial and parallel directions is intimately connected. The effects of mode structure symmetry breaking on nonlinear physics, energetic particle transport, and the possible insight for experimental studies are discussed.
Original languageEnglish
Article number012512
Pages (from-to)-
JournalPhysics of Plasmas
Volume25
Issue number1
DOIs
Publication statusPublished - 1 Jan 2018
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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