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

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.

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

Publication Date:

OSTI Identifier:

22227888

Resource Type:

Journal Article

Resource Relation:

Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 8; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)

Country of Publication:

United States

Language:

English

Subject:

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