Simulation of beams or plasmas crossing at relaticistic velocity
Simulation of beams or plasmas crossing at relaticistic velocity
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DOI：
10.1063/1.2837054
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发表时间：
2007-11
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影响因子：
--
通讯作者：
J. Vay
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文献类型：
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作者：
J. Vay
相对论速度下光束或等离子体交叉的模拟。美国加州劳伦斯伯克利国家实验室∗摘要本文讨论了用质点格法模拟相对论速度交叉的光束或等离子体的数值问题。指出了使用标准鲍里斯粒子推进器存在的问题，提出了一种绕过这些问题的新型推进器，并在单粒子试验中证明了其efi有效性。提出了一种在物种平均速度方向上保留静电、静磁和感应fi场的求解方法，该方法比完全的fi近似完全显式且简单。最后，给出了利用这种新特性计算超相对论束流与电子背景相互作用的结果。电子地址：jlvay@lbl.gov
Simulation of beams or plasmas crossing at relativistic velocity. J.-L. Vay Lawrence Berkeley National Laboratory, CA, U.S.A. ∗ Abstract This paper addresses the numerical issues related to the modeling of beams or plasmas crossing at relativistic velocity using the Particle-In-Cell method. Issues related to the use of the standard Boris particle pusher are identified and a novel pusher which circumvents them is proposed, whose effectiveness is demonstrated on single particle tests. A procedure for solving the fields is proposed, which retains electrostatic, magnetostatic and inductive field effects in the direction of the mean velocity of the species, is fully explicit and simpler than the full Darwin approximation. Finally, results are given, from a calculation using the novel features, of an ultra-relativistic beam interacting with a background of electrons. Electronic address: jlvay@lbl.gov