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Alfvén wave heating of a cylindrical plasma using axisymmetric waves. Part 2. Kinetic theory

Published online by Cambridge University Press:  13 March 2009

I. J. Donnelly ,
B. E. Clancy  and
N. F. Cramer
I. J. Donnelly
Affiliation:
Australian Atomic Energy Commission Research Establishment, Private Mail Bag, Sutherland, N.S.W. 2232, Australia
B. E. Clancy
Affiliation:
Australian Atomic Energy Commission Research Establishment, Private Mail Bag, Sutherland, N.S.W. 2232, Australia
N. F. Cramer
Affiliation:
School of Physics, University of Sydney, Sydney, N.S.W. 2006, Australia
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Abstract

Kinetic theory, including ion Larmor radius effects, is used to analyse the Alfvén wave heating of cylindrical plasmas using axisymmetric waves excited by an antenna at frequencies up to the ion cyclotron frequency. At the Alfvén resonance position, the compressional wave is mode converted to a quasi-electrostatic wave (QEW) which propagates towards the plasma centre or edge depending on whether the plasma is hot or warm. The energy absorbed by the plasma agrees with the MHD theory predictions provided the QEW is heavily damped before reaching the plasma centre or edge; if it is not, then QEW resonances may occur with a consequent increase in antenna resistance. The relation between ion cyclotron wave resonances and QEW resonances in a hot plasma is shown. The behaviour described above is demonstrated by numerical solution of the wave equations for small and large tokamak-like plasmas. WKB theory has been used to derive useful expressions which quantify the QEW behaviour.

Type
Research Article
Information
Journal of Plasma Physics , Volume 35 , Issue 1 , February 1986 , pp. 75 - 106
Copyright
Copyright © Cambridge University Press 1986

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