Simulation Method of Electromagnetic Characteristics of Inhomogeneous Plasma Based on Monte Carlo Method

Abstract

The invention discloses a non-uniform plasma electromagnetic characteristic simulation method based on the Monte Carlo method. The method includes the steps that S1, an electromagnetic field is irradiated in a particle mode, and initial movement trends of particles are determined; S2, next positions of the particles are calculated, and the refractive index and the absorption coefficient of plasmaare extracted; S3, whether the particles are absorbed or not is judged, if the particles are absorbed, the method skips to the step S6, and if the particles are not absorbed, the step S4 is conducted;S4, changes of the movement directions of the particles are calculated; S5, whether the positions of the particles reach the external contour surface of a plasma model or not is judged, if the positions of the particles do not reach the external contour surface of the plasma model, the method skips to the step S2, next movement cycling of the particles is started, and if the positions of the particles reach the external contour surface of the plasma model, the step S6 is conducted; S6, whether the number of the particles which are absorbed or reach the external contour surface of the plasma model meets the requirements or not is judged, if the number of the particles which are absorbed or reach the external contour surface of the plasma model does not meet the requirements, the method skips to the step S1, and if the number of the particles which are absorbed or reach the external contour surface of the plasma model meets the requirements, the step S7 is conducted; S7, electromagnetic-field particles reach the external contour surface of the plasma model are subjected to field integration, and the required electromagnetic characteristic is obtained. According to the non-uniform plasma electromagnetic characteristic simulation method based on the Monte Carlo method, the effect process and the mechanism between electromagnetic waves and non-uniform plasma can be directly analyzed, and the simulation calculation efficiency of the electromagnetic characteristic can be improved.

Description

technical field [0001] The invention relates to the technical field of calculation of radar target electromagnetic scattering characteristics, in particular to a simulation method for non-uniform plasma electromagnetic characteristics based on a Monte Carlo method. Background technique [0002] The commonly used simulation methods for the interaction between plasma and radar electromagnetic waves mainly include the WKB approximation method and the FDTD method. The WKB method is based on the geometrical optics approximation, and then solves the wave equation. It is an approximate method. The WKB method is only applicable when the plasma parameters change slowly enough with the position, and it is generally used in one-dimensional non-uniform situations. The FDTD method can be applied to solve the aircraft plasma sheath with arbitrary distribution. However, when the plasma sheath distribution is complex or the electromagnetic wave frequency is high, the FDTD method requires a ...

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a simulation method for the electromagnetic characteristics of non-uniform plasma based on the Monte Carlo method, which solves the problem that the electromagnetic characteristics of three-dimensional electrically large-scale non-uniform plasma are difficult to simulate and calculate

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