长脉冲折叠型螺旋脉冲形成线的设计和初步实验  

Design and Primary Experiments of a High Power Long Pulse Folded Coaxial Spiral Pulse Foring Line

作　　者：殷毅[1] 钟辉煌[1] 张晓萍[1] 刘金亮[1] 杨建华[1] 冯加怀[1] 

机构地区：[1]国防科技大学光电科学与工程学院,长沙410073

出　　处：《高电压技术》2010年第2期439-443,共5页High Voltage Engineering

基　　金：国家自然科学基金(10675168)~~

摘　　要：高功率脉冲功率调制器的紧凑化是其重要研究方向,为此将螺旋线与折叠线技术相结合,设计了一种长脉冲折叠型同轴螺旋脉冲调制器,该调制器将两根螺旋型脉冲形成线通过过渡段部分连接,形成折叠结构,在一定的长度范围内实现了长脉冲的输出,设计指标为:二极管电压400 kV,负载电流26 kA,脉冲宽度约为260 ns。对传输线的电压波过程进行了分析,结果表明,过渡段阻抗与传输线阻抗匹配时输出波形最好;用PSpice软件对脉冲形成线的充电电压和二极管电压、电流进行了模拟;利用高压同轴电缆,进行了低压情况下的验证实验,实验结果与理论分析、模拟研究结果一致。此种类型的调制器具有运行稳定、体积小、结构紧凑的特点。Spiral and folded transmission line are the most effective methods to generate long pulse high power pulse.Combined these two methods together,a long pulse accelerator using water as the transmission dielectric,with two spiral pulse high power pulse transmission lines connected by a transition part to form a folded line,was designed.At the length of 1.2 m,high power pulse with pulse length 260 ns was designed.The wave process of the pulse modulator was analyzed.PSpice circuit was used to calculate the voltage,current at the dummy load.Factors affecting the waveform of the load were also studied.The results show that the modulator can work with charging voltage greater than 1 MV without water breakdown.Experiments were done using high power coaxial line at the voltage of 20 kV;the results are in agreement with the theory and simulation.This technique can be used to increase the energy stored per unit length for a PFL of fixed impedance and pulse duration.

关 键 词：脉冲调制器 长脉冲 折叠脉冲形成线 螺旋脉冲形成线 加速器 高功率 

分 类 号：TN761[电子电信—电路与系统]