表面波等离子体柱导电性及其激发系统方案  

Conductivity and Excitation of Surface Wave Plasma Column

作　　者：王世庆[1,2] 向茜[1] 柳建[1,2] 位朝垒[1] 孙乃峰[1] 

机构地区：[1]核工业西南物理研究院,成都610041 [2]成都理工大学工程技术学院,四川乐山614007

出　　处：《应用科学学报》2009年第4期392-396,共5页Journal of Applied Sciences

基　　金：国防基础科研基金(No.A122006001)资助项目

摘　　要：表面波等离子体柱可用于具有隐身性能的等离子体天线,而提高低频激励表面波等离子体柱的导电性能是一个难题。该文通过分析等离子体密度与功率的平衡关系,导出了单极表面波激励弱电离等离子体柱电导率与激励功率和频率的关系,利用数字频率合成技术和功率增益自动控制技术稳定激励功率和频率,以达到提高等离子体柱导电性能的目的。通过实验研究了等离子体柱电导率与等离子体密度和柱体长度的关系。该方案可有效提高等离子体柱导电性及系统整体性能,对等离子体天线研究具有参考价值。When using surface wave plasma column in stealth plasma antennas, it is difficult to improve conductivity of the surface wave plasma column for low-frequency excitation. This paper studies the relationship between conductivity and the excitation power/frequency of the monopole surface wave excitation weakly ionized plasma column. This is done by analyzing the equilibrium relationship between the plasma density and power. A scheme for stabilizing the excitation power and frequency is proposed, using the direct digital frequency synthesis and power gain automatic control techniques to improve the plasma column conductivity. Experiments are carried out to study relationship between the physical properties of the plasma column conductivity and the plasma column density and length. Compared with the original excitation system without using the proposed method, this scheme can improve plasma column conductivity and the overall performance of the system.

关 键 词：表面波等离子体柱 导电性能 激发系统 直接数字频率合成 功率增益自动控制 

分 类 号：TN136[电子电信—物理电子学]