| 一种高效率和高功率的双同轴虚阴极振荡器 |
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| 引用本文： | 杨温渊,丁武.一种高效率和高功率的双同轴虚阴极振荡器[J].强激光与粒子束,2003,15(11):1079-1082. |
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| 作者姓名： | 杨温渊 丁武 |
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| 作者单位： | 北京应用物理与计算数学研究所， 北京 100088 |
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| 基金项目： | :国家863计划项目资助课题 |
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| 摘 要： | 提出了一种双同轴虚阴极振荡器，并对其进行了理论分析和数值模拟。这种振荡器采用了一种新的能量提取结构，将波束相互作用和能量提取分开进行。提取区内轴的左端面可以反射微波，为波束相互作用提供反馈机制；同时还可以吸收在下游漂移的电子，这有利于输出功率和效率的提高。在器件的入口处注入峰值电压为500kV的梯形脉冲时，模拟得到了瞬时峰值功率大于2.5GW，周期平均的峰值功率约1.2GW的微波输出，频率为2.175GHz，能量提取效率达到11％。输出的微波保持了传统同轴虚阴极振荡器的优点，模式纯度高、谱宽非常窄。
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| 关 键 词： | 双同轴虚阴极振荡器 能量提取结构 数值模拟 |
| 文章编号： | 1001-4322(2003)11-1079-04 |
| 收稿时间： | 2003/4/24 |
| 修稿时间： | 2003年4月24日 |
A new coaxial vircator with high efficiency and high power |
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| yang wen yuan,ding wu.A new coaxial vircator with high efficiency and high power[J].High Power Laser and Particle Beams,2003,15(11):1079-1082. |
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| Authors: | yang wen yuan ding wu |
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| Institution: | Institute of Applied Physics and Computational Mathematics， P.O.Box 8009-11, Beijing 100088, China |
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| Abstract: | A new structure of the coaxial vibrator is proposed and studied numerically in this paper. Using the coaxial extraction structure, the beam-wave interaction and energy extraction are carried out separately. The left wall of the extraction cavity will reflect the microwave, thus provide a feedback for the beam-wave interaction. And it can also absorb the used electrons drifting in the outer space of the interaction region. When a pulse with peak voltage of 500 kV is fed into the vibrator, a peak instant power greater than 2.5 GW is achieved by simulation at 2.175 GHz; the peak period-averaged power reaches 1.2 GW with an rms efficiency of 11%. The output power has high mode purity and narrow bandwidth as in a conventional coaxial vibrator. |
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| Keywords: | Bicoaxial vircator Energy extraction structure Numerical simulation |
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