Geodesic Acoustic Eigenmodes

Kimitaka ITOH; Sanae-I. ITOH; Patrick H. DIAMOND; Akihide FUJISAWA; Masatoshi YAGI; Tetsuo WATARI; Yoshihiko NAGASHIMA; Atsushi FUKUYAMA

doi:10.1585/pfr.1.037

Rapid Communications

Geodesic Acoustic Eigenmodes

Kimitaka ITOH, Sanae-I. ITOH, Patrick H. DIAMOND, Akihide FUJISAWA, Masatoshi YAGI, Tetsuo WATARI, Yoshihiko NAGASHIMA, Atsushi FUKUYAMA

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Keywords: geodesic acoustic mode, zonal flow, eigenmode, eigenfrequency, temperature gradient

JOURNAL FREE ACCESS

2006 Volume 1 Pages 037

DOI https://doi.org/10.1585/pfr.1.037

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Abstract

The eigenmode of a geodesic acoustic mode in the presence of a temperature gradient is discussed. Eigenmodes are obtained and the characteristic wavelength scales as ρ_i^2/3L_T^1/3 (ρ_i: ion gyroradius, L_T: temperature gradient scale length). The direction of propagation is discussed.

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