On scattering and damping of toroidal Alfvén eigenmode by drift wave turbulence
Liu Chen, Zhiyong Qiu, F. Zonca
Abstract
Abstract We demonstrate analytically that, in toroidal plasmas, scattering by drift wave turbulence could lead to appreciable damping of toroidal Alfvén eigenmodes via generation of short-wavelength electron Landau damped kinetic Alfvén waves. A corresponding analytic expression of the damping rate is derived, and found to be, typically, comparable to the linear drive by energetic particles. The implications of this novel mechanism on the transport and heating processes in burning plasmas are also discussed.
Topics & Concepts
PhysicsToroidLandau dampingTurbulenceScatteringPlasmaElectronWavelengthWave turbulenceComputational physicsQuantum electrodynamicsNormal modeAtomic physicsMechanicsOpticsQuantum mechanicsVibrationMagnetic confinement fusion researchIonosphere and magnetosphere dynamicsLaser-Plasma Interactions and Diagnostics