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arXiv 1909.09281physics.plasm-ph
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用电子注入中和离子束第2部分:静电孤波的激发和传播

Neutralization of ion beam by electron injection, Part 2: Excitation and propagation of electrostatic solitary waves

Chaohui Lan, Igor D. Kaganovich

摘要:

利用二维静电粒子模拟程序研究了电子注入离子束的电荷中和过程。模拟结果表明,静电孤立波(ESW)可以在中和过程中产生,并持续很长时间(超过30 us),对中和过程有很强的影响. ESW沿着离子束的轴传播并从束边界反射。模拟清楚地表明,两个ESW可以通过彼此只有很小的幅度变化。在模拟中观察到两个ESW碰撞中的部分交换,可以解释两个ESW碰撞过程中的相互作用。还观察到两个ESW的合并。

英文摘要:

The charge neutralization of an ion beam by electron injection is investigated using a two-dimensional electrostatic particle-in-cell code. The simulation results show that electrostatic solitary waves (ESWs) can be robustly generated in the neutralization process and last for long time (for more than 30 us); and therefore ESW can strongly affect the neutralization process. The ESWs propagate along the axis of the ion beam and reflect from the beam boundaries. The simulations clearly show that two ESWs can pass through each other with only small changes in amplitude. Partial exchange of trapped electrons in collisions of two ESWs is observed in the simulations and can explain interaction during collisions of two ESWs. Coalescence of two ESWs is also observed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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