Nonlinear simulation of toroidal Alfveacuten eigenmode with source and sink

作者：Lang Jianying^*; Fu Guo Yong; Chen Yang

来源：Physics of Plasmas, 2010, 17(4): 042309.

DOI：10.1063/1.3394702

• eigenvalues and eigenfunctions
• plasma Alfven waves
• plasma collision processes
• plasma instability
• plasma kinetic theory
• plasma magnetohydrodynamics
• plasma nonlinear waves
• plasma simulation
• plasma toroidal confinement
• Tokamak devices

Kinetic/magnetohydrodynamic hybrid simulations are carried out to investigate the nonlinear dynamics of energetic particle-driven toroidal Alfveacuten eigenmode with collision and source/sink. For cases well above marginal stability, the mode saturation is approximately steady state with finite collision frequency. The calculated scaling of saturation level with collision frequency agrees well with analytic theory. For cases near-marginal stability at low collision rates, the mode saturation exhibits pulsation behavior with frequency chirps up and down.

• 出版日期2010-4