Effect of Ion Composition on Magnetosonic Waves(Gases, plasmas, electric discharges, and beams)
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概要
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The propagation of the two types of fast magnetosonic waves, i.e., low- and high-frequency modes, in a two-ion-species plasma is studied theoretically and numerically. It is analytically found that the KdV equation for the low-frequency mode is valid for amplitudes ε<2Δ_ω, where Δ_ω=(ω_<+0>-ω_<-r>)/ω_<+0> with ω_<+0> being the cutoff frequency of the high-frequency mode and ω_<-r> the resonance frequency of the low-frequency mode ; Δ_ω is given as a function of the density ratio and cyclotron frequency ratio of two ion species. It is then suggested that nonlinear coupling between the two modes can occur if ε>2Δ_ω. With electromagnetic particle simulations, the evolution of the low- and high-frequency-mode pulses is investigated for various density and cyclotron frequency ratios and is compared with theoretical predictions. In particular, it is shown that high-frequency-mode pulses are generated from a long-wavelength low-frequency-mode pulse if its amplitude ε exceeds 2Δ_ω.
- 社団法人日本物理学会の論文
- 2007-10-15
著者
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Toida Mieko
Department Of Physics Nagoya University
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Ohsawa Yukiharu
Department Of Physics Nagoya University
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HIGASHINO Hiroyuki
Department of Physics, Nagoya University
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Higashino Hiroyuki
Department Of Physics Nagoya University
関連論文
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- Envelope Shock Waves in Interactions of Plasma Waves of Random Phase
- Evolution of Magnetohydrodynamic Waves and Acceleration of Particles in a Collision of Two Plasmas(Gases, plasmas, electric discharges, and beams)
- Evolution of Oblique Shock Waves in a Reversed External Magnetic Field and Associated Electron Acceleration(Gases, plasmas, electric discharges, and beams)
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- Prodrction of Ultrarelativistic Electrons by Obliqre Magnetosonic Shock Waves
- Shock Structures and Electron Energies in Wave and de Hoffmann-Teller Frames
- Propagation of Solitary Pulses in Interactions of Plasma Waves. II
- Envelope Shock Waves in Interactions of Longitudinal Plasma Waves of Random Phase
- Envelope Shock Waves in Interactions of Plasma Waves of Random Phase. II
- Effect of Magnetic-Field Gradient on Positron Acceleration along the Magnetic Field in an Oblique Shock Wave
- Effects of Electromagnetic Fluctuations along Shock Front on Electron Motions in an Oblique Shock Wave
- Shock Structures and Electron Energies in Wave and de Hoffmann–Teller Frames
- Electromagnetic Fields in Nonlinear Magnetosonic Waves with Relativistic Propagation Speeds
- Energy Transfer to Heavy Ions by Nonlinear Evolution of Current-Driven Instabilities in a Multi-Ion-Species Plasma
- Detrapping Mechanism of Ultrarelativistic Electrons from an Oblique Shock Wave