一种高效计算各向异性磁化等离子体的时域有限差分算法

Efficient FDTD Algorithm for Anisotropic Magnetized Plasma

利用电流密度和电场强度的卷积关系,引入电流密度和电场强度分段线性近似,导出一种适合各向异性磁化等离子体介质的FDTD算法的计算公式.计算各向异性碰撞磁化等离子体平板对平行于磁场传播的电磁波的反射和透射系数,与解析结果比较,验证该算法的高效性和高精度,与电流密度卷积(JEC)算法和分段线性电流密度卷积(PLCDRC)算法相比,计算精度及计算效率显著提高.此外,用该算法验证了法拉第旋转效应.

A novel finite-difference time-domain （FDTD） method for anisotropic magnetized plasma is derived with piecewise hnear approximation and recursive convolutions of current density J and electric field E. J and E employ a piecewise linear approximation, respectively. High efficiency and accuracy of the method are confirmed with reflection and transmission coefficients through a collisioual magnetized plasma slab with propagation direction parallel to biasing field. Compared with frequency domain analytic results, good agreement is observed. The proposed method shows higher efficiency and accuracy than current density convolution （J.EC-FDTD） and piecewise linear current density recursive convolution （PLCDRC-FDTD） approaches. In addition, Faraday rotation effect is demonstrated.