Electromagnetic zonal flow residual responses
Journal article, 2017

The collisionless axisymmetric zonal flow residual calculation for a tokamak plasma is generalized to include electromagnetic perturbations. We formulate and solve the complete initial value zonal flow problem by retaining the fully self-consistent axisymmetric spatial perturbations in the electric and magnetic fields. Simple expressions for the electrostatic, shear and compressional magnetic residual responses are derived that provide a fully electromagnetic test of the zonal flow residual in gyrokinetic codes. Unlike the electrostatic potential, the parallel vector potential and the parallel magnetic field perturbations need not relax to flux functions for all possible initial conditions.

tokamak

zonal flow

plasma

residual

electromagnetic

Author

Peter J. Catto

Massachusetts Institute of Technology (MIT)

F. I. Parra

Culham Centre for Fusion Energy

University of Oxford

Istvan Pusztai

Chalmers, Physics, Subatomic and Plasma Physics

Journal of Plasma Physics

0022-3778 (ISSN) 1469-7807 (eISSN)

Vol. 83 3 Article no 905830402-

Driving Forces

Sustainable development

Areas of Advance

Energy

Subject Categories

Fusion, Plasma and Space Physics

DOI

10.1017/S0022377817000472