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Electromagnetic zonal flow residual responses

Part of: Focus on Fusion

Published online by Cambridge University Press:  03 July 2017

Peter J. Catto ,
Felix I. Parra  and
István Pusztai
Peter J. Catto*
Affiliation:
Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Felix I. Parra
Affiliation:
Rudolf Peierls Centre for Theoretical Physics, University of Oxford, Oxford OX1 3NP, UK Culham Centre for Fusion Energy, Abingdon OX14 3DB, UK
István Pusztai
Affiliation:
Department of Physics, Chalmers University of Technology, 41296 Gothenburg, Sweden
*
†Email address for correspondence: catto@psfc.mit.edu
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Abstract

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.

Keywords

fusion plasmamagnetized plasmasplasma dynamics

Information

Type
Research Article
Information
Journal of Plasma Physics , Volume 83 , Issue 4 , August 2017 , 905830402
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Copyright
© Cambridge University Press 2017 

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