Sideband Instabilities of a Large-Amplitude Whistler Wave Due to Phase-Bunching of Resonant Particles with Small Perpendicular Velocities

• Okamoto Katsuro

  Department of Physics, Faculty of Science, Kyoto University

• Mima Kunioki

  Faculty of Science, Hiroshima University

• Nishikawa Kyoji

  Faculty of Science, Hiroshima University

• Katayama Yoshishige

  Faculty of Engineering, Nihon University

抄録

New types of sideband instabilities associated with a large-amplitude whistler wave propagating parallel to an external magnetic field B₀ are proposed and investigated. The instabilities are due to a spiral beam consisting of resonant particles of small velocities, v_⊥, perpendicular to B₀. It is shown analytically that in collisionless plasmas the angles ζ between the wave magnetic field and v_⊥ of these particles, when started from a random distribution, bunch quickly to π/2. A spiral beam is formed when there exist collisions which are insufficient to destroy this phase bunching, but are sufficient to prevent any other systematic variation of ζ. Under these conditions, three different whistler modes are found unstable in the immediate vicinity of the carrier wave frequency. Their growth rates can become greater than those of previously investigated sideband instabilities if the resonance velocity substantially exceeds the thermal velocity.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 37 (6), 1658-1667, 1974

  一般社団法人 日本物理学会

キーワード

• General Physics and Astronomy

詳細情報

• CRID: 1390001204195510144
• NII論文ID: 110001959441
• NII論文ID: 210000084690
• NII論文ID: 130003736376
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.37.1658
• BIBCODE: 1974JPSJ...37.1658O
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 7669798
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7669798
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.37.1658
• 本文言語コード: en
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