新型反馈式轴向同轴虚阴极振荡器
A novel configuration of vircator with coaxial waveguide
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摘要: 提出一种利用低磁场导引环形电子束在同轴波导内轴向激励虚阴极振荡的新型虚阴极振荡器.利用反馈式结构,使虚阴极在由反馈环、阳极箔和同轴波导构成的高品质因子准谐振腔内形成.作用腔内环形电子束激励同轴波导TM_(01)模式,在相对低品质因子的同轴提取区转化为TEM主模输出.用2.5维KARAT粒子模拟软件研究得到束波功率转换效率12%,输出微波平均2.7 GW,中心频率3.8 GHz.Abstract: A novel configuration of vircator with coaxial waveguide generated by annular electron beam under low guiding magnetic field is presented and the 2.5-D particle-in-cell simulations are carried out using KARAT code.We obtain High power microwave with average power of 2.7GW,frequency of 3.8GHz,of which the beam-to-wave power efficiency and dominant mode are 12%and TEM mode,respectively.
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