向外发射同轴型虚阴极振荡器研究

STUDIES OF OUTWARD-EMITTING COAXIAL VIRCATOR

在高功率微波源研究领域提出了一种新型虚阴极器件———向外发射同轴型虚阴极振荡器 .对其相关束流特性进行了理论分析 ,得到了同轴空间径向传输空间电荷限制电流 ,以及虚阴极产生的条件和电子束运动的基本规律 .基于数值模拟得到的结果 ,向外发射同轴型虚阴极振荡器不仅表现出较高的能量转换效率 ,而且有利于增加虚阴极器件产生高功率微波的脉宽 ,同时还可以应用于低频段高功率微波源 .

As a novel concept of vircator geometry proposed in this paper, the outward-emitting coaxial vircator (OECV) is at the cutting edge in the field of high-power microwave (HPM) source researches. Theoretical analyses are carried out to study the space-charge-limiting current in coaxial configuration and the terms of virtual cathode formation. According to the simulation results, OECV has the advantages in energy conversion efficiency and bears the potentialities in increasing the high-power microwave pulse width, as well as in generating HPM in relatively low bands. Two kinds of geomtries for HPM emission are also given in this paper.