Excitation of geodesic acoustic mode continuum by drift wave turbulence

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 anal...

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Bibliographic Details
Published inJournal of plasma physics Vol. 78; no. 6; pp. 651 - 655
Main Authors YU, JUN, DONG, J. Q., LI, X. X., DU, D., GONG, X. Y.
Format Journal Article
LanguageEnglish
Published Cambridge, UK Cambridge University Press 01.12.2012
Subjects
Electrostatics
Geodetics
Plasma physics
Turbulence
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Summary: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.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0022-3778
1469-7807
DOI:10.1017/S002237781200058X