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PhysRevLett.111.215003 pdf  1.15 MB  14

基本情報

タイトル Electron acceleration in a nonrelativistic shock with very high Alfvén Mach number.
作成者 MATSUMOTO, Yosuke  研究者リゾルバ
AMANO, Takanobu  研究者リゾルバ
HOSHINO, Masahiro  研究者リゾルバ
作成者ID 1000020397475
作成者ID 1000000514853
作成者ID 1000090241257
作成者の別表記 松本, 洋介  研究者リゾルバ
天野, 孝伸  研究者リゾルバ
星野, 真弘  研究者リゾルバ
内容 [ABSTRACT] Electron acceleration associated with various plasma kinetic instabilities in a nonrelativistic shock with very high Alfvén Mach number (M(A)~45) is revealed by means of a two-dimensional fully kinetic particle-in-cell simulation. Electromagnetic (ion Weibel) and electrostatic (ion-acoustic and Buneman) instabilities are strongly activated at the same time in different regions of the two-dimensional shock structure. Relativistic electrons are quickly produced predominantly by the shock surfing mechanism with the Buneman instability at the leading edge of the foot. The energy spectrum has a high-energy tail exceeding the upstream ion kinetic energy accompanying the main thermal population. This gives a favorable condition for the ion-acoustic instability at the shock front, which in turn results in additional energization. The large-amplitude ion Weibel instability generates current sheets in the foot, implying another dissipation mechanism via magnetic reconnection in a three-dimensional shock structure in the very-high-M(A) regime.
ハンドルURL http://opac.ll.chiba-u.jp/da/curator/104420/
フルテキストへのリンク http://opac.ll.chiba-u.jp/da/curator/104420/PhysRevLett.111.215003.pdf
公開者 American Physical Society
NII資源タイプ 学術雑誌論文
ISSN 10797114
掲載誌名 Physical review letters
111
21
開始ページ 215003-1
終了ページ 215003-5
刊行年月 2013-11-22
DOI(出版者版) 10.1103/PhysRevLett.111.215003
著者版フラグ publisher
権利関係 Copyright 2013 American Physical Society
カテゴリ PubMed 収録論文 (PMC除く)