冯杰,郭立新,徐彬,等. 固体火箭喷焰的尘埃等离子体非相干散射研究[J]. 电波科学学报,2021,36(4):511-517 + 531. DOI: 10.13443/j.cjors.2020042102
      引用本文: 冯杰,郭立新,徐彬,等. 固体火箭喷焰的尘埃等离子体非相干散射研究[J]. 电波科学学报,2021,36(4):511-517 + 531. DOI: 10.13443/j.cjors.2020042102
      FENG J, GUO L X, XU B, et al. The incoherent scattering of dust plasma produced by solid rocket exhaust[J]. Chinese journal of radio science,2021,36(4):511-517 + 531. (in Chinese). DOI: 10.13443/j.cjors.2020042102
      Citation: FENG J, GUO L X, XU B, et al. The incoherent scattering of dust plasma produced by solid rocket exhaust[J]. Chinese journal of radio science,2021,36(4):511-517 + 531. (in Chinese). DOI: 10.13443/j.cjors.2020042102

      固体火箭喷焰的尘埃等离子体非相干散射研究

      The incoherent scattering of dust plasma produced by solid rocket exhaust

      • 摘要: 航天飞机通过电离层时,喷焰提供了相较于周围等离子体的高速中性气体,与背景电离层中的O+离子交换电荷,产生环形离子分布(也称Bump-on-tail分布),这将对非相干散射雷达(incoherent scattering radar, ISR)谱产生显著影响. 基于尘埃等离子体非相干散射理论,建立了固体火箭喷焰早期离子Bump-on-tail分布的非相干散射模型,模拟并分析了尘埃掺杂和分布函数对非相干散射谱的影响,进而对其响应机制进行了解释. 结果表明,尘埃组分的引入增强了离子谱,分布函数对离子谱线的影响则与生成等离子体的谐振频率有着密切关系. 该研究对于理解自然等离子体和人工等离子体的物理性质都具有重要意义.

         

        Abstract: When the space shuttle passes though the ionosphere, the plume provides a high-speed neutral gas compared to the surrounding plasma. Simultaneously, the exhaust molecules exchange charge with the ambient O+ ions in the ionosphere, producing a ring-beam ion distribution(bump-on-tail distribution), which has an important effect on incoherent scattering radar(ISR) spectrum. Based on the theory of incoherent scattering of dust plasma, the incoherent scattering characteristics of the bump-on-tail distribution in the early stage of solid rocket exhaust are simulated. The influences of dust component and plasma distribution on the incoherent scattering spectrum are analyzed, and the mechanism of the influence is initially explained. The results show that the addition of dust enhances the ion spectrum, and the influence of distribution function on the ion spectrum is closely related to the resonant frequency of the generated plasma. The research on ISR characteristics of the plasma distributions is important to understand the physics of both nature and artificial plasma.

         

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