Nonlinear dynamics of beta induced Alfv\'en eigenmode driven by energetic particles
Plasma Physics
2015-06-04 v1
Abstract
Nonlinear saturation of beta induced Alfv\'en eigenmode, driven by slowing down energetic particles via transit resonance, is investigated by the nonlinear hybrid magnetohyrodynamic gyro-kinetic code (XHMGC). Saturation is characterized by frequency chirping and symmetry breaking between co- and counter-passing particles, which can be understood as the 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 non-uniformity and mode structure.
Cite
@article{arxiv.1203.3769,
title = {Nonlinear dynamics of beta induced Alfv\'en eigenmode driven by energetic particles},
author = {X. Wang and S. Briguglio and L. Chen and G. Fogaccia and C. Di Troia and G. Vlad and F. Zonca},
journal= {arXiv preprint arXiv:1203.3769},
year = {2015}
}