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

作　　者：冯杰[1,2] 郭立新 徐彬 吴健[1,2] 许正文[1] 赵海生 马征征[1] FENG Jie;GUO Lixin;XU Bin;WU Jian;XU Zhengwen;ZHAO Haisheng;MA Zhengzheng(National Key Laboratory of Electromagnetic Environment,China Research Institute of Radiowave Propagation,Qingdao 266170,China;School of Physics and Optoelectronic Engineering,Xidian University,Xi’an 710071,China)

机构地区：[1]中国电波传播研究所电波环境特性及模化技术重点实验室,青岛266107 [2]西安电子科技大学物理与光电工程学院,西安710071

出　　处：《电波科学学报》2021年第4期511-517,531,共8页Chinese Journal of Radio Science

基　　金：国家自然科学基金(11672068);电波环境特性及模化技术重点实验室基金(201903001);泰山学者工程专项经费资助(ts20190968);基础性科研院所稳定支持课题。

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.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.

关 键 词：火箭尾焰 环形离子分布 尘埃等离子体 带电尘埃粒子 非相干散射 

分 类 号：P352[天文地球—空间物理学]