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Excitation of geodesic acoustic mode continuum by drift wave turbulence

Published online by Cambridge University Press:  13 June 2012

JUN YU ,
J. Q. DONG ,
X. X. LI ,
D. DU  and
X. Y. GONG
JUN YU
Affiliation:
School of Mathematics and Physics, University of South China, Hengyang, Hunan Province 421001, P. R. China
J. Q. DONG
Affiliation:
Institute for Fusion Theory and Simulation, Department of Physics, Zhejiang University, Hangzhou 310027, P. R. China Southwestern Institute of Physics, P.O. Box 432, Chengdu, P. R. China
X. X. LI
Affiliation:
School of Nuclear Science and Technology, University of South China, Hengyang, Hunan Province 421001, P. R. China (gongxueyu@126.com)
D. DU
Affiliation:
School of Mathematics and Physics, University of South China, Hengyang, Hunan Province 421001, P. R. China
X. Y. GONG
Affiliation:
School of Nuclear Science and Technology, University of South China, Hengyang, Hunan Province 421001, P. R. China (gongxueyu@126.com)
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Abstract

Excitation of the geodesic acoustic mode continuum by drift wave turbulence is studied using the wave kinetic approach. For a model profile of weak non-uniform ion temperature, the forms of growth rate and radial structure of geodesic acoustic modes are obtained analytically. The growth rate is analyzed for several conditions for present-day tokamaks and compared with that for uniform ion temperature, as well as that given by the coherent mode approach for non-uniform ion temperature.

Type
Papers
Information
Journal of Plasma Physics , Volume 78 , Issue 6 , December 2012 , pp. 651 - 655
Copyright
Copyright © Cambridge University Press 2012

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