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arXiv physics/0612064physics.plasm-phphysics.space-ph
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电子麦克斯韦等离子体中电场脉冲传播的某些特性及其响应

On some peculiarities of electric field pulse propagation in electron Maxwellian plasma and its back response

V. N. Soshnikov

摘要:

本着继续研究等离子体波的一般性质的精神,我们研究了具有麦克斯韦电子分布函数的半无限均匀等离子体平板边缘x=0处电场脉冲的最简单形式的边界问题。在纵向电场脉冲的情况下,其传播速度基本上不同于谐波的情况;也没有反向响应。在横向场脉冲的情况下,出现非阻尼快脉冲信号和非阻尼弱慢符号反向脉冲信号的双峰传播速率;在渐进体制形成的近坐标区,随着时间延迟,出现一些很弱的响应(回波)。

英文摘要:

In the spirit of continued study of general plasma wave properties we investigated the boundary problem with the simplest form of electric field pulse at the edge x=0 of half-infinite uniform plasma slab with Maxwellian electron distribution function. In the case of longitudinal electric field pulse its traveling velocity is essentially other than in the case of harmonic waves; there is also no back response. In the case of transverse field pulse there takes place the bimodal propagation rate of the non-damping fast pulse signal and non-damping weak slow sign reversed pulse signals; some very weak response (echo) arises with a time delay in the near coordinate zone of formation of the asymptotical regime.

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