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Title:
Excitation of geodesic acoustic mode continuum by drift wave turbulence
Authors:
Yu, Jun; Dong, J. Q.; Li, X. X.; Du, D.; Gong, X. Y.; Gong
Affiliation:
AA(School of Mathematics and Physics, University of South China, Hengyang, Hunan Province 421001, P. R. China), AB(Institute for Fusion Theory and Simulation, Department of Physics, Zhejiang University, Hangzhou 310027, P. R. China), AC(School of Nuclear Science and Technology, University of South China, Hengyang, Hunan Province 421001, P. R. China ()), AD(School of Mathematics and Physics, University of South China, Hengyang, Hunan Province 421001, P. R. China), AE(School of Nuclear Science and Technology, University of South China, Hengyang, Hunan Province 421001, P. R. China ()), AF()
Publication:
Journal of Plasma Physics, Volume 78, Issue 6, pp. 651-655
Publication Date:
12/2012
Origin:
CUP
Abstract Copyright:
(c) 2012: Copyright © Cambridge University Press 2012
DOI:
10.1017/S002237781200058X
Bibliographic Code:
2012JPlPh..78..651Y

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.
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