3-D FDTD Modeling of Electromagnetic Wave Propagation in Magnetized Plasma Requiring Singular Updates to the Current Density Equation
3-D FDTD Modeling of Electromagnetic Wave Propagation in Magnetized Plasma Requiring Singular Updates to the Current Density Equation
复制标题
DOI：
10.1109/tap.2018.2847601
复制
发表时间：
2018-06
影响因子：
5.7
通讯作者：
S. Pokhrel;Varun Shankar;J. Simpson
中科院分区：
文献类型：
--
作者：
S. Pokhrel;Varun Shankar;J. Simpson
提出了一种新的电磁波在磁化等离子体中传播的时域有限差分（FDTD）算法。该算法允许使用两个时间步长增量：一个用于麦克斯韦方程，${\Delta t}$，另一个用于从洛伦兹运动方程导出的电流密度方程，${\Delta }{t}_{c}$。该算法的一个主要优点是，即使在${\Delta }{t}_{c}时，电流密度方程也只需要一次更新迭代。这提供了显著的时间节省，可以使以前不可行的长模拟现在变得可行。该算法的实现也相对简单，并且具有相对低的存储器需求。该算法对分析结果进行了验证。进行了稳定性分析。
A new finite-difference time-domain (FDTD) algorithm for electromagnetic wave propagation in magnetized plasma is proposed. This algorithm permits the use of two time step increments: one for Maxwell’s equations, ${\Delta t}$ , and the other for the current density equation derived from the Lorentz equation of motion, ${\Delta }{t}_{c}$ . A major advantage of this algorithm over previous approaches is that only a single update iteration is needed for the current density equation even when ${\Delta }{t}_{c}. This provides significant time savings that can make previously infeasibly long simulations now practical. The algorithm’s implementation is also relatively simple and it has relatively low memory requirements. The algorithm is validated against analytical results. A stability analysis is performed.