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325 MHz微波栅控高压型热阴极电子枪的设计研究

夏乾旭 赵全堂 宗阳 曹树春 李中平 申晓康 张子民

夏乾旭, 赵全堂, 宗阳, 等. 325 MHz微波栅控高压型热阴极电子枪的设计研究[J]. 强激光与粒子束, 2021, 33: 044009. doi: 10.11884/HPLPB202133.200310
引用本文: 夏乾旭, 赵全堂, 宗阳, 等. 325 MHz微波栅控高压型热阴极电子枪的设计研究[J]. 强激光与粒子束, 2021, 33: 044009. doi: 10.11884/HPLPB202133.200310
Xia Qianxu, Zhao Quantang, Zong Yang, et al. Design of 325 MHz RF grid-controlled high voltage thermionic cathode electron gun[J]. High Power Laser and Particle Beams, 2021, 33: 044009. doi: 10.11884/HPLPB202133.200310
Citation: Xia Qianxu, Zhao Quantang, Zong Yang, et al. Design of 325 MHz RF grid-controlled high voltage thermionic cathode electron gun[J]. High Power Laser and Particle Beams, 2021, 33: 044009. doi: 10.11884/HPLPB202133.200310

325 MHz微波栅控高压型热阴极电子枪的设计研究

doi: 10.11884/HPLPB202133.200310
基金项目: 国家重点研发计划项目(2016YFE0104900)
详细信息
    作者简介:

    夏乾旭(1996—),男,硕士研究生,从事微波栅控电子枪设计方面的研究;1206158607@qq.com

    通讯作者:

    张子民(1972—),男,博士,从事电子加速器设计方面的研究;zzm@impcas.ac.cn

  • 中图分类号: TL53

Design of 325 MHz RF grid-controlled high voltage thermionic cathode electron gun

  • 摘要: 高重复频率、高平均流强的电子枪具有十分广泛的应用。设计了一台束团重复频率为325 MHz在CW模式工作的微波栅控高压型热阴极电子枪,并详细论述了该类型微波栅控电子枪的实验原理。在该类型电子枪的设计中,首先需要利用仿真模拟软件EGUN、POISSON(PoissonSuperfish)、GPT(General Particle Tracer)完成300 kV直流高压电子枪的结构设计,并进行束流动力学验证计算。为将微波馈入该直流电子枪的阴栅极之间,进行了该微波栅控电子枪的供电系统设计,完成了从射频功率源到同轴热阴极的阻抗匹配方案,设计了一种325 MHz双模式同轴供电器件,并进行了验证与分析。
  • 图  1  微波栅控热阴极高压型电子枪原理示意图

    Figure  1.  Principle of grid-controlled high voltage thermionic cathode electron gun

    图  2  束团出射相位图

    Figure  2.  Diagram of phase that electron beam can escape

    图  3  EGUN模拟−300 kV直流电子枪束流结果图

    Figure  3.  Beam of the −300 kV DC electron gun simulated by EGUN

    图  4  距阴极55 cm处沿径向束流密度分布图

    Figure  4.  Radial beam current distribution at 55 cm from anode

    图  5  束团半径变化示意图

    Figure  5.  Diagram of bunch radius variation

    图  6  距阴极55 cm处束团能量分散图

    Figure  6.  Longitudinal energy distribution at z=55 cm

    图  7  均方根发射度随时间变化曲线图

    Figure  7.  Root mean square emittance change with time

    图  8  距阴极55 cm处束团横向相空间分布图

    Figure  8.  Transverse phase space distribution at z=55 cm

    图  9  电路连接示意图

    Figure  9.  Diagram of circuit connection

    图  10  阻抗匹配史密斯圆图

    Figure  10.  Path (blue line) of impedance matching in Smith chart

    图  11  双模式同轴供电器件尺寸图

    Figure  11.  Size of dual mode coaxial power supply device

    图  12  输入端口反射系数随频率变化图

    Figure  12.  Reflection coefficient varies with frequency

    图  13  传输系数随频率变化图

    Figure  13.  Transmission coefficient varies with frequency

    表  1  电子枪设计参数

    Table  1.   Parameters of electron gun

    voltage/kV frequency/MHz working mode beam current/mA beam transverse emittance/(mm·mrad) energy spread/%
    −300 325 CW 5 <5 <0.5
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-11-16
  • 修回日期:  2021-03-15
  • 网络出版日期:  2021-03-26
  • 刊出日期:  2021-05-02

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