Nonlinear saturation of toroidal Alfven eigenmodes via nonlinear mode couplings
Plasma Physics
2018-10-15 v1
Abstract
Gyrokinetic theory of nonlinear mode coupling as a mechanism for toroidal Alfven eigenmode (TAE) saturation in the fusion plasma related parameter regime is presented, including 1) para- metric decay of TAE into lower kinetic TAE (LKTAE) and geodesic acoustic mode (GAM), and 2) enhanced TAE coupling to shear Alfven wave (SAW) continuum via ion induced scattering. Our theory shows that, for TAE saturation in the parameter range of practical interest, several processes with comparable scattering cross sections can be equally important.
Keywords
Cite
@article{arxiv.1810.05300,
title = {Nonlinear saturation of toroidal Alfven eigenmodes via nonlinear mode couplings},
author = {Zhiyong Qiu and Liu Chen and Fulvio Zonca and Wei Chen},
journal= {arXiv preprint arXiv:1810.05300},
year = {2018}
}
Comments
Proceeding of 27th IAEA-Fusion Energy Conference