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140 GHz折叠波导行波管电子光学系统设计与验证

陈炤飞 陈辑 吴玉娟 谢青梅 字张雄

陈炤飞, 陈辑, 吴玉娟, 等. 140 GHz折叠波导行波管电子光学系统设计与验证[J]. 强激光与粒子束. doi: 10.11884/HPLPB202436.240134
引用本文: 陈炤飞, 陈辑, 吴玉娟, 等. 140 GHz折叠波导行波管电子光学系统设计与验证[J]. 强激光与粒子束. doi: 10.11884/HPLPB202436.240134
Chen Zhaofei, Chen ji, Wu Yujuan, et al. Design and verification of electron optical system for 140 GHz folded waveguide travelling wave tube[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202436.240134
Citation: Chen Zhaofei, Chen ji, Wu Yujuan, et al. Design and verification of electron optical system for 140 GHz folded waveguide travelling wave tube[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202436.240134

140 GHz折叠波导行波管电子光学系统设计与验证

doi: 10.11884/HPLPB202436.240134
详细信息
    作者简介:

    陈炤飞,chenzhaofeiczf@163.com

  • 中图分类号: TN124

Design and verification of electron optical system for 140 GHz folded waveguide travelling wave tube

  • 摘要: 设计了一种140 GHz折叠波导行波管电子光学系统,利用三维粒子仿真软件Opera-3D对考虑热初速效应的圆形电子注在周期永磁聚焦系统内传输状态进行了仿真分析,并对磁场过渡区进行了优化设计,改善电子注与磁场的匹配效果。经计算,该电子光学系统阴极发射电流60 mA,阴极电压20 kV,流通率99.9%。样管测试结果显示,电子枪参数与设计结果相符合,实测流通率达到97.2%,行波管实现连续波稳定工作。
  • 图  1  麦克斯韦速度分布划分示意图

    Figure  1.  Maxwell velocity distribution with 5 sample areas

    图  2  优化后的电子枪结构模型及电子轨迹

    Figure  2.  Simulation model and the obtained electron beam track of the optimized electron gun

    图  3  注腰截面电子分布特征

    Figure  3.  Beam cross section at beam waist

    图  4  电子注注腰位置径向电流分布

    Figure  4.  Current distribution under different radial distance at beam waist

    图  5  PPM聚焦磁场结构设计

    Figure  5.  Simulation model of PPM focusing magnetic system

    图  6  电子传输轨迹与轴向磁场分布

    Figure  6.  Electron trajectories with axial magnetic field of PPM

    图  7  不同轴向位置电子注截面径向电流分布

    Figure  7.  Radial current of beam cross section at different z-positions

    图  8  电子枪验证管

    Figure  8.  Schematic diagram of the TWT electron gun validation

    图  9  140 GHz折叠波导行波管样管

    Figure  9.  Schematic diagram of the 140 GHz FTWT

    表  1  电子枪基本参数

    Table  1.   Parameters of electron gun

    Beam voltage/
    kV
    beam current/
    mA
    Perveance/
    μP
    compression
    ratio
    cathode radius/
    mm
    cathode radius of
    curvature/mm
    −20 60 0.021 41.9 0.55 7
    下载: 导出CSV

    表  2  实测与仿真对比

    Table  2.   Comparison between measurement and simulation

    Parameter Beam voltage/kV Beam current/mA Bz/T Transmission ratio/%
    Measurement −19.45 59.8 0.6 97.2
    Simulation −20 60 0.57 99.9
    下载: 导出CSV
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出版历程
  • 收稿日期:  2024-04-22
  • 修回日期:  2024-09-18
  • 录用日期:  2024-07-24
  • 网络出版日期:  2024-09-25

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