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Cross-field-current-driven electrostatic instabilities in plasmas with generalized distribution functions

B.N. Goswami, B. Buti1975年被引用 9Nuclear FusionIF 3出版社

The generalized distribution function is used to investigate the effects of loss-cone and temperature anisotropy on the cross-field-current-driven electrostatic instabilities, i.e. the modified two-stream instability, the ion-acoustic instability and the electron cyclotron drift instability. These effects are important only when (k is the wave number and ρe the electron gyroradius). It is seen that non-Maxwellian plasmas with distribution index J≥1, can sustain fast-growing waves even in the region of k-space which is stable for a Maxwellian plasma. Moreover, when λ ∼ 1, the temperature anisotropy is found to have a destabilizing effect on.the modified-two-stream instability and on the ion acoustic instability.

日本語訳

一般化分布関数を用いて、損失円錐と温度異方性が、交差磁場電流駆動静電不安定性、すなわち修正二流体不安定性、イオン音波不安定性、および電子サイクロトロン漂移不安定性に及ぼす影響を調べた。これらの効果は、kが波数、ρeが電子ジャイロ半径であるとき、kρe ≲ 1の場合にのみ重要である。分布指数J≧1を持つ非マクスウェルプラズマは、マクスウェルプラズマに対して安定なk空間の領域でも、高速成長する波動を維持できることがわかった。さらに、λ ∼ 1のとき、温度異方性は修正二流体不安定性とイオン音波不安定性に対して不安定化効果を持つことが見出された。

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