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A FDTD analysis on magnetized plasma of Epstein distribution and reflection calculation

机译:EB磁化等离子体的FDTD分析和反射计算

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摘要

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 a and plasma thickness on the reflection coefficient is calculated. The results show that with different a, 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. (C) 2008 Elsevier B.V. All rights reserved.
机译:针对磁化弥散介质开发的一种新颖的具有算子之间递归关系的时域有限差分(FDTD)方法被称为移位算子FDTD(SO-FDTD)方法。本文将磁化分散介质的介电特性写为有理多项式函数,并在时域推导了D和E之间的关系。通过计算电磁波通过碰撞等离子体平板的反射和透射系数,验证了该方法的高精度和高效率。由于等离子体中的电子密度按爱泼斯坦公式分布,因此计算出了梯度系数a和等离子体厚度对反射系数的影响。结果表明,在不同的α值下,反射系数与入射频率之间的分布相同。但在某些特定频率范围内存在一定差异。在不同条件下,不同厚度对反射系数的影响较小。 (C)2008 Elsevier B.V.保留所有权利。

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