Plasma Simulation beyond Rigid-Macroparticle Approximation

• 作者: Chengpu Liu Hai Lin
• 来源期刊: 现代物理(英文)
• 学科: 数学
• 关键词: Particle Beam Plasma Rigid-Macroparticle APPROXIMATION SELF-CONSISTENT Field Simulation Vlasov-Maxwell System
• 年，卷（期）: 2018,（5）
• 页码范围: 807-815
• 页数: 9页
• 分类号: O1

摘要

Current mainstream method of simulating plasma is based on rigid-macroparticle approximation in which many realistic particles are merged, according to their initial space positions regardless of their initial velocities, into a macroparticle, and do a global motion. This is a distorted picture because what each macroparticle do is to break into, because of differences among velocities of contained realistic particles, pieces with different destinations at next time point, rather than a global moving to a destination at next time point. Therefore, the scientific validity of results obtained from such an approximation cannot be warranted. Here, we propose a solution to this problem. It can fundamentally warrant exact solutions of plasma self-consistent fields and hence those of microscopic distribution function.