Sideband Instabilities of a Large-Amplitude Whistler Wave Due to Phase-Bunching of Resonant Particles with Small Perpendicular Velocities
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概要
- 論文の詳細を見る
New types of sideband instabilities associated with a large-amplitude shistler wave propagating parallel to an external magnetic field B_0 are proposed and investigated. The instabilities are due to a spiral beam consisting of resonant particles of small velocities, υ_⊥, perpendicular to B_0. It is shown analytically that in collisionless plasmas the angles ζ between the wave magnetic field and υ_⊥ of these particles, when started form a random distribution, bunch quickly to π/2. A spiral beam is formed when there exist colllisions which are insufficient to destroy this phase bunching, but are sufficient to prevent any other systematic variation of ζ. Under these conditions, three defferent whistler modes are found unstable in the immediate vicinity of the carrier wave frequency. Their growth rates can become areater than those of previously investigated sideband instabilities if the resonance velocity substantially exceeds the thermal velocity.
- 社団法人日本物理学会の論文
- 1974-12-15
著者
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NISHIKAWA Kyoji
Faculty of Science,Hiroshima University
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Okamoto Katsuro
Department Of Bio-medical Engineering School Of High-technology For Human Welfare Tokai University
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Okamoto Katsuro
Department Of Physics Faculty Of Science Kyoto University
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MIMA Kunioki
Faculty of Science, Hiroshima University
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KATAYAMA Yoshishige
Faculty of Engineering, Nihon university
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Katayama Yoshishige
Faculty Of Engineering Nihon University
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Nishikawa Kyoji
Faculty Of Science Hiroshima University
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Nishikawa Kyoji
Faculty Of Science
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Mima Kunioki
Faculty Of Science Hiroshima University:bell Laboratories
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Mima Kunioki
Faculty Of Science Hiroshima University
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Nishikawa Kyoji
Faculty of Engineering, Iwate University
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