| 引用本文: | 令钧溥,贺军涛,张建德,等.行波提取型同轴渡越时间振荡器模拟.[J].国防科技大学学报,2013,35(6):120-125.[点击复制] |
| LING Junpu,HE Juntao,ZHANG Jiande,et al.Numerical study of a coaxial transit-time oscillator with travelling-wave output structure[J].Journal of National University of Defense Technology,2013,35(6):120-125[点击复制] |
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| 行波提取型同轴渡越时间振荡器模拟 |
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(国防科技大学 光电科学与工程学院， 湖南 长沙 410073)
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| 摘要: |
| 提出了一种行波提取型同轴渡越时间振荡器，器件的提取腔采用了类膜片加载的扩展互作用腔结构，具有束波作用效率高，电子束空间电势能低等优点。提取腔的电场结构为3π/2模，与传统的类π模结构相比，提高了微波群速度，有利于微波能量的提取。通过引入前置反射腔，提高了调制腔的品质因数，显著降低了起振时间。利用数值模拟软件对所设计的器件进行了模拟和优化，在二极管电压530kV，二极管电流12.8kA，外加导引磁场0.7T的条件下，得到了2.41GW的输出功率，微波频率7.76GHz，束波功率转换效率达到35.5%。 |
| 关键词: 行波提取结构 类膜片加载 渡越时间振荡器 提取腔 粒子模拟 |
| DOI： |
| 投稿日期：2013-02-26 |
| 基金项目:国家高技术发展计划项目；国家自然科学基金资助项目（61171021） |
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| Numerical study of a coaxial transit-time oscillator with travelling-wave output structure |
| LING Junpu1, HE Juntao2, ZHANG Jiande2, CAO Yibing2, BAI Xianchen2 |
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(1.College of Opto-electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China;2.College of Opto electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| A coaxial transit-time oscillator with travelling-wave output structure is proposed. The extractor of this device adopts an extended interaction cavity loaded with washer-like structure, which has the advantage of high beam-wave interaction efficiency and low space charge potential energy. The extractor operating at 3π/2 mode not π-like mode improves the group velocity of wave, which is favorable for RF extraction. The loaded quality factor of the buncher is increased by introducing a prior reflector, which can obviously reduce the starting time of microwave. The device is designed and optimized by a PIC (particle in cell) code. With the voltage 530 kV，the current 12.8 kA and the guiding magnetic field 0.7 T, the output power is 2.41GW at the main frequency 7.76GHz, and the efficiency of beam-to-microwave power conversion is about 35.5%. |
| Keywords: travelling-wave output structure washer-like loaded transit-time oscillator extractor particle-in-cell simulation |
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