Abstract
AbstractThe radial eigenmode of the geodesic acoustic mode (GAM) is investigated, taking into account the finite ion Larmor radius effect. The radial eigenfunction and the eigenfrequency (real frequency and damping rate) are obtained numerically. The eigenfrequency is found to be not continuous, but discrete. In addition, we obtain an analytic expression for the real eigenfrequency, which shows good agreement with numerical results. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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