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On the transition between the Weibel and the whistler instabilities

L Palodhi, F Califano, F Pegoraro2010年Plasma Physics and Controlled FusionIF 2.2出版社

The transition between non-resonant (Weibel-type) and resonant (whistler) instabilities is investigated numerically in plasma configurations with an ambient magnetic field of increasing amplitudes. The Vlasov–Maxwell system is solved in a configuration where the fields have three components but depend only on one coordinate and on time. The nonlinear evolution of these instabilities is shown to lead to the excitation of electromagnetic and electrostatic modes at the first few harmonics of the plasma frequency and, in the case of a large ambient magnetic field, to a long wavelength, spatial modulation of the amplitude of the magnetic field generated by the whistler instability.

日本語訳

非共鳴(ワイベル型)と共鳴(ホイッスラー型)不安定性の間の遷移が、増大する振幅の周囲磁場を伴うプラズマ配位において数値的に調査される。 Vlaソフ–マクスウェル系は、場が3つの成分を持つが1つの座標と時間のみに依存する配位において解かれる。これらの不安定性の非線形発展は、プラズマ周波数の最初の数高調波における電磁モードと静電モードの励起、および大きな周囲磁場の場合には、ホイッスラー不安定性によって生成された磁場振幅の長波長の空間変調をもたらすことが示される。

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