有约束边界的微波等离子体喷流电子数密度分布规律实验研究  

Experimental Study of Electron Density Distribution of Microwave Plasma Plume with Restricted Boundary

作　　者：朱良明[1] 毛根旺[1] 许映乔[1] 杨涓[1] 

机构地区：[1]西北工业大学航天学院,陕西西安710072

出　　处：《西北工业大学学报》2007年第5期686-690,共5页Journal of Northwestern Polytechnical University

基　　金：国家自然科学基金(1057508);航空基金(2006ZA53005)资助

摘　　要：对等离子体进行电子数密度诊断是开展等离子体飞行器隐身研究的基础。利用发射探针诊断真空中有约束边界微波等离子体喷流中的电子数密度。诊断实验表明：在有约束边界条件下，当真空环境压强为2～6Pa、微波等离子体发生器（MPT）以60W以下的微波功率击穿流量范围是21-105mg／s的氩气时，所产生的喷流中电子数密度分布在10^15-8×10^16m^-3范围内。In the full paper, we do experiments to diagnose the electron density distribution of microwave plasma plume; in this abstract, we just add some pertinent remarks to listing the two topics of explanation. The first topic is： experimental system. In this topic, we give Fig. 1 to present the experimental system and explain how the microwave plasma plume is formed. The second topic is： experimental results and their analysis. In this topic, we use three subtopics to present the experimental results. Subtopic 2.1 discusses the influence of microwave power and mass flow rate on axial electron distribution. Subtopic 2. 2 deals with the influence of microwave power and mass flow rate on radial electron density distribution. Figs. 9 through 14 in the full paper show that, given the same power, electron density increases with the increase of mass flow rate. Subtopic 2. 3 presents the influence of vacuum condition on electron density distribution. The electron density diagnosis results show preliminarily that ; under the vacuum condition when pressure is 3 to 6 Pa, mass flow rate is 21 to 105 mg/s, and the output power of microwave plasma generator is less than 60 W, the electron density in the plasma plume with restricted boundary is 10^15-8×16^16 m^-3.

关 键 词：微波等离子体 电子密度诊断 发射探针 

分 类 号：V218[航空宇航科学与技术—航空宇航推进理论与工程]