Energy Transfer to Heavy Ions by Nonlinear Evolution of Current-Driven Instabilities in a Multi-Ion-Species Plasma
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概要
- 論文の詳細を見る
Current-driven instabilities and associated energy transport among different particle species in a plasma consisting electrons and hydrogen (H) and helium (He) ions are studied theoretically and numerically. First, a theory predicting the dominant unstable modes is developed. Theoretical estimates of energy gains of ions from the waves are also obtained. Next, by means of a three-dimensional electrostatic particle code with full ion and electron dynamics, the nonlinear evolution of the instabilities and the energy transfer to ions are further investigated. Simulations show that the second harmonic H cyclotron wave with parallel phase velocity equal to the initial electron drift speed eventually becomes dominant owing to the change in the electron velocity distribution function. The observed heating rate of He ions by the dominant wave is much greater than that of H ions. These simulation results are in good agreement with the theory.
- Physical Society of Japanの論文
- 2001-11-15
著者
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Toida Mieko
Department Of Physics Nagoya University
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Sugishima Akihiro
Department Of Physics Nagoya University
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Sugishima Akihiro
Department of Physics, Nagoya University, Nagoya 464-8602
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- Effect of Ion Composition on Magnetosonic Waves(Gases, plasmas, electric discharges, and beams)
- Collisionless Damping of Low-Frequency Magnetosonic Pulses in a Two-Ion-Species Plasma
- Effects of Electromagnetic Fluctuations along Shock Front on Electron Motions in an Oblique Shock Wave
- 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