论文标题
高原子数量气体的多级电离的有效数值算法
Efficient numerical algorithm for multi-level ionization of high-atomic-number gases
论文作者
论文摘要
在电磁粒子中的电磁粒子代码空间中提出并实现了激光驱动的多级电离的有效数值算法。该算法基于描述电离演化的微分方程系统的分析解决方案。使用分析解决方案，由于电离过程的不同特征时间尺度和主要代码时间步骤，因此解决了电离的多尺度问题。通过使用局部降低的微分方程系统，提高了算法效率。检查了轨道量子数及其预测的影响。该算法应用于将电子将电子注入激光驱动的等离子体Wakefields的研究。
An efficient numerical algorithm for the laser driven multi-level ionization of high-atomic-number gases is proposed and implemented in an electromagnetic particle-in-cell code SPACE. The algorithm is based on analytical solutions to the system of differential equations describing ionization evolution. Using analytical solutions resolves the multiscale issue of ionization due to different characteristic time scales of ionization processes and the main code time step. Algorithm efficiency is improved by using a locally-reduced system of differential equations. The effects of the orbital quantum numbers and their projections have been examined. The algorithm is applied to the study of ionization injection of electrons into laser-driven plasma wakefields.
