强激光与粒子束2011，Vol.23Issue(10)：2711-2714,4.DOI:10.3788/HPLPB20112310.2711
导引磁场控制相对论速调管放大器电子束收集的方法
RKA electron beam collection controlled by guiding magnetic field
摘要
Abstract
An electron beam collection method in relativistic klystron amplifier(RKA) controlled by magnetic field is proposed. The influence of collection position on beam-wave conversion efficiency and stability of RKA is also analyzed. When the e-lectron beam is collected at a proper position, the interaction between beam and microwave can be enhanced, and the space charge potential of electron beam and the number of reflected electrons can be reduced. An RKA has been improved with electron beam collection at the frequency of 2. 85 GHz. When the electron beam voltage and current are 510 keV, 8. 1 kA, the input power is 500 kW, and the guiding magnetic field is 1. 5 T, an output power of 1. 4 GW is obtained, and the corresponding efficiency and gain are 33. 7% and 33. 8 dB, respectively. When the beam collection is not improved, the output power is 1. 1 GW, and the efficiency and gain are 26. 3% and 33. 4 dB, respectively. The magnetic field pattern needed for the improved collection in the RKA is designed by Superfish, and the field data are imported into the PIC code. The related simulation results show that the electron beam collection position is controlled effectively by the magnetic field, and the beam-wave conversion efficiency is 32%.关键词
相对论速调管放大器/空间电荷势能/电子束收集/磁场位形设计Key words
relativistic klystron amplifier/ space charge potential/ electron beam collection/ magnetic field pattern design分类
信息技术与安全科学引用本文复制引用
张泽海,舒挺,张军..导引磁场控制相对论速调管放大器电子束收集的方法[J].强激光与粒子束,2011,23(10):2711-2714,4.基金项目
国家高技术发展计划项目 （）
国家自然科学基金项目(11075211) （11075211）
湖南省高校科技创新团队基金项目 （）
