尘埃等离子体的谐振问题研究  

Studyon resonance process of dust plasma

作　　者：徐彬[1] 李辉[1,2] 许正文[1] 马征征[1] 王占阁[1] 吴健[1] 

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]哈尔滨工业大学物理系,哈尔滨150001

出　　处：《电波科学学报》2017年第1期16-21,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金(41004065;61601419;11672068);电波环境特性及模化技术重点实验室基金(2014000001)

摘　　要：基于尘埃等离子体的色散关系,在不考虑高/低频近似的情况下,推导了尘埃等离子体谐振频率和增长率的表达式,讨论了尘埃质量、尘埃密度和载波频率对谐振过程的影响,给出了尘埃等离子体谐振过程的基本物理规律.典型火箭喷焰等离子体参数条件下,考察了高速尘埃粒子组分的引入对谐振过程的影响.仿真结果表明,尘埃速度在1km/s的条件下即可激发谐振过程,谐振频率约为3kHz.尘埃等离子体谐振机理模型和高速组分影响机制的得出对深入理解尘埃等离子体的物理过程和火箭喷焰的异常衰减机制具有重要意义.Based on the kinetic theory, the dispersion relation of dust plasma is presented. Without the effects of dust mass, density and carrier frequency on resonance process are discussed. The basic physical laws of dust plasma resonance process are obtained. The influence of high velocity dust particles on resonance process for the typical rocket plume is analyzed. The simulation results show that the resonance process can be excited with a dust velocity of 1 km/s, and the resonance frequency is 3 kHz. The mecha- nisms of dust plasma resonance and the effect of high velocity dust are of great significance for understand- ing the physical process of dust plasma and abnormal decay of rocket plume.

关 键 词：尘埃等离子体 介电函数 色散关系 谐振 

分 类 号：P352[天文地球—空间物理学]