Plasma and Fusion Research
Online ISSN : 1880-6821
ISSN-L : 1880-6821
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Theory for Finite Temperature Effects on Magnetosonic Waves in a Two-Ion-Species Plasma
Yukio AOTAMieko TOIDA
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2013 Volume 8 Pages 2401018

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Abstract

The theory of magnetosonic waves perpendicular to a magnetic field in a two-ion-species plasma is extended to include finite temperature effects based on the three-fluid model with finite ion and electron pressures. First, the condition for the dispersion relation of the low-frequency mode, the lower branch of magnetosonic waves, to be approximated as a form of weak dispersion is presented. Next, by virtue of this, it is shown that the KdV equation for the low-frequency mode is valid for amplitude ε < εmax, where the upper limit of the amplitude εmax is given as a function of the ratio of the kinetic to magnetic energies, the density ratio, and the cyclotron frequency ratio of two ion species. The finite-temperature effects on linear and nonlinear high-frequency modes and on heavy-ion acceleration by the high-frequency-mode pulse are also discussed.

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© 2013 by The Japan Society of Plasma Science and Nuclear Fusion Research
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