Radial eigenmodes of geodesic acoustic modes

M. Sasaki, K. Itoh, A. Ejiri, Y. Takase

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


The 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.

Original languageEnglish
Pages (from-to)68-72
Number of pages5
JournalContributions to Plasma Physics
Issue number1-3
Publication statusPublished - Mar 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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