Research on Electromagnetic Scattering Characteristics of Moving Time-Varying Dusty Plasma Based on Lorentz-SO-FDTD Method

IF 1.5 4区物理与天体物理 Q3 PHYSICS, FLUIDS & PLASMAS

IEEE Transactions on Plasma Science Pub Date : 2025-08-22 DOI:10.1109/TPS.2025.3574812

Yong Bo;Xiaolong Pan;Xianmin Guo;Qingqing Deng;Wei Chen;Lixia Yang

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Abstract

This article establishes an electromagnetic scattering model for high-speed moving targets covered by a dusty plasma sheath, utilizing the Bhatnagar-Gross–Krook (BGK) collision model of fully ionized dusty plasma. The proposed Lorentz-shift-operator finite-difference time-domain (Lorentz-SO-FDTD) method is employed to compute the backscatter radar cross section (RCS) of complex blunt cone targets at varying velocities. Furthermore, considering the time-varying nature of electron density in dusty plasma, this study investigates the frequency-domain scattering properties of a moving blunt cone target coated with time-varying dusty plasma. The results indicate that the Doppler effect, caused by the target’s motion, influences both the echo signal and the backward RCS. Additionally, the time-varying characteristics of electron density modulate the scattering field of moving targets. The frequency components of the time-varying electron density and their higher order harmonics can be detected in the scattering field spectrum, leading to a reduction in the primary frequency energy of the echo signal spectrum.

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基于Lorentz-SO-FDTD方法的运动时变尘埃等离子体电磁散射特性研究

本文利用全电离尘埃等离子体的Bhatnagar-Gross-Krook （BGK）碰撞模型，建立了尘埃等离子体护套覆盖下高速运动目标的电磁散射模型。采用提出的lorentz -shift-算子时域有限差分法（Lorentz-SO-FDTD）计算复杂钝锥目标在变速度下的后向散射雷达截面（RCS）。此外，考虑到尘埃等离子体中电子密度的时变特性，本文研究了时变尘埃等离子体包覆运动钝锥靶的频域散射特性。结果表明，目标运动引起的多普勒效应对回波信号和后向RCS都有影响。此外，电子密度的时变特性对运动目标的散射场有调制作用。在散射场谱中可以检测到时变电子密度的频率分量及其高次谐波，导致回波信号频谱的一次频率能量降低。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Plasma Science 物理-物理：流体与等离子体

CiteScore

3.00

自引率

20.00%

发文量

538

审稿时长

3.8 months

期刊介绍： The scope covers all aspects of the theory and application of plasma science. It includes the following areas: magnetohydrodynamics; thermionics and plasma diodes; basic plasma phenomena; gaseous electronics; microwave/plasma interaction; electron, ion, and plasma sources; space plasmas; intense electron and ion beams; laser-plasma interactions; plasma diagnostics; plasma chemistry and processing; solid-state plasmas; plasma heating; plasma for controlled fusion research; high energy density plasmas; industrial/commercial applications of plasma physics; plasma waves and instabilities; and high power microwave and submillimeter wave generation.