Finite beta effects on low- and high-frequency magnetosonic waves in a two-ion-species plasma

Journal Article · Thu Aug 15 00:00:00 EDT 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4817169· OSTI ID:22227888

Toida, Mieko; Aota, Yukio ^[1]

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1. Department of Physics, Nagoya University, Nagoya 464-8602 (Japan)

A magnetosonic wave propagating perpendicular to a magnetic field in a two-ion-species plasma has two branches, high-frequency and low-frequency modes. The finite beta effects on these modes are analyzed theoretically on the basis of the three-fluid model with finite ion and electron pressures. First, it is shown that the Korteweg-de Vries (KdV) equation for the low-frequency mode is valid for amplitudes ε<ε{sub max}, where the upper limit of the amplitude ε{sub max} is given as a function of β (β is the ratio of the kinetic and magnetic energy densities), the density ratio, and the cyclotron frequency ratio of two ion species. Next, the linear dispersion relation and KdV equation for the high-frequency mode are derived, including β as a factor. In addition, the theory for heavy ion acceleration by the high-frequency mode pulse and the pulse damping due to this energy transfer in a finite beta plasma are presented.

• OSTI ID: 22227888
• Journal Information: Physics of Plasmas, Vol. 20, Issue 8; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ACCELERATION
AMPLITUDES
BETA RATIO
CYCLOTRON FREQUENCY
DAMPING
DISPERSION RELATIONS
ELECTROMAGNETIC RADIATION
ELECTRONS
ENERGY DENSITY
ENERGY TRANSFER
HEAVY IONS
ION ACOUSTIC WAVES
KORTEWEG-DE VRIES EQUATION
MAGNETIC FIELDS
MAGNETOACOUSTIC WAVES
PLASMA DENSITY
PLASMA PRESSURE