A FDTD analysis on magnetized plasma of Epstein distribution and reflection calculation
A FDTD analysis on magnetized plasma of Epstein distribution and reflection calculation
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DOI：
10.1016/j.cpc.2008.08.007
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Hong Wei Yang
中科院分区：
文献类型：
--
作者：
Hong Wei Yang
一种针对磁化色散介质开发的具有算子之间递归关系的新型时域有限差分（FDTD）方法，称为移位算子FDTD（SO-FDTD）方法。本文将磁化色散介质的介电特性写成有理多项式函数，在时域上推导了D和E之间的关系。通过计算电磁波通过碰撞等离子体板的反射和透射系数，验证了该方法的高精度和高效性。由于等离子体中电子密度按Epstein公式分布，计算了梯度系数σ和等离子体厚度对反射系数的影响。结果表明，不同σ时，反射系数与入射频率的分布相同；但在某些特定频率范围内存在一定差异。并且不同条件下不同厚度对反射系数的影响较小。
A novel finite-difference time-domain (FDTD) method with recursive relationships among operators, developed for magnetized dispersive medium, is named shift operator FDTD (SO-FDTD) method. In this paper, the dielectric property of magnetized dispersive media is written as rational polynomial function, the relationship between D and E is deduced in time-domain. The high accuracy and efficiency of this method is verified by calculating the reflection and transmission coefficient of electromagnetic waves through a collisional plasma slab. As the electron density in plasma distributes as Epstein formula, the effect of the gradient coefficient σ and plasma thickness on the reflection coefficient is calculated. The results show that with different σ, the distribution between the reflection coefficient and the incidence frequency is same; but there is certain difference within some specific frequency range. And there are fewer effects of different thicknesses on the reflection coefficient under different conditions.