磁声孤子在有界等离子体板中反弹引起的累积位移
Cumulative displacement induced by a magnetosonic soliton bouncing in a bounded plasma slab
摘要：
冷等离子体中磁声孤子的通过导致带电粒子在压缩脉冲方向和稀疏脉冲方向的位移。在过密等离子体极限下，解析地导出了弱非线性MS孤子引起的位移。这个结果，然后用来推导出一个渐近展开的位移所产生的反弹运动的MS孤子在真空边界的冷等离子体板来回反射。粒子的位移后，脉冲能量已经失去了真空区的比例，作为光速阿尔文速度。几个MS孤子反射后的位移的结果证实了粒子在细胞模拟。
英文摘要：
The passage of a magnetosonic (MS) soliton in a cold plasma leads to the displacement of charged particles in the direction of a compressive pulse and in the opposite direction of a rarefaction pulse. In the overdense plasma limit, the displacement induced by a weakly nonlinear MS soliton is derived analytically. This result is then used to derive an asymptotic expansion for the displacement resulting from the bouncing motion of a MS soliton reflected back and forth in a vacuum-bounded cold plasma slab. Particles' displacement after the pulse energy has been lost to the vacuum region is shown to scale as the ratio of light speed to Alfvén velocity. Results for the displacement after a few MS soliton reflections are corroborated by particle-in-cell simulations.
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