短脉冲高功率微波大气电离与击穿数值分析  

Numerical Analyses of Air Ionization and Breakdown of Short-Pulse High-Power Microwave

作　　者：赵朋程[1] 廖成[1] 林文斌[1] 唐涛[1] 

机构地区：[1]西南交通大学电磁场与微波技术研究所

出　　处：《西南交通大学学报》2011年第1期109-114,共6页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金资助项目(60771020)

摘　　要：为探讨短脉冲高功率微波(HPM)的大气击穿规律,通过求解大气电子动量方程,得到用于拟合电离参数的等效电场.将等效电离参数代入电子密度连续性方程并求解,获得了窄带和超宽带HPM脉冲的大气击穿阈值与海拔高度以及逃逸时间(逃逸能量)与脉冲振幅之间的关系.此外,还分析了大气击穿时超宽带HPM脉冲的能量传输问题.结果表明,海拔高度、脉冲宽度、频谱分布和振幅对大气击穿都有明显影响.In order to investigate air breakdown caused by short-pulse HPM（high-power microwave）,the effective electric field,an important parameter for the calculation of ionization parameters,was obtained by solving the electron momentum equation for air.The effect of altitude on the air breakdown thresholds of narrowband and ultra-wideband HPM pulses and the relationship between escaping time or energy and pulse amplitude were given by substituting the effective ionization parameters into and solving the continuity equation of electron density.In addition,the energy transmission of an ultra-wideband HPM pulse under the condition of air breakdown was analyzed.The research results show that altitude,pulse width,spectrum distribution and amplitude have a significant impact on the air breakdown.

关 键 词：高功率微波脉冲 窄带 超宽带 击穿阈值 逃逸时间 等效电场 

分 类 号：O441[理学—电磁学]