中国物理B ›› 2022, Vol. 31 ›› Issue (5): 54103-054103.doi: 10.1088/1674-1056/ac3d84

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Electron beam modeling and analyses of the electric field distribution and space charge effect

Yueling Jiang(蒋越凌) and Quanlin Dong(董全林)   

  1. School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing, China
  • 收稿日期:2021-09-30 修回日期:2021-11-14 出版日期:2022-05-14 发布日期:2022-04-21
  • 通讯作者: Quanlin Dong,E-mail:dongquanlin@buaa.edu.cn E-mail:dongquanlin@buaa.edu.cn
  • 基金资助:
    Project supported by CAST Innovation Fund (Grant No.CAST-BISEE2019-040).

Electron beam modeling and analyses of the electric field distribution and space charge effect

Yueling Jiang(蒋越凌) and Quanlin Dong(董全林)†   

  1. School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing, China
  • Received:2021-09-30 Revised:2021-11-14 Online:2022-05-14 Published:2022-04-21
  • Contact: Quanlin Dong,E-mail:dongquanlin@buaa.edu.cn E-mail:dongquanlin@buaa.edu.cn
  • About author:2021-11-26
  • Supported by:
    Project supported by CAST Innovation Fund (Grant No.CAST-BISEE2019-040).

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摘要： In electron beam technology, one of the critical focuses of research and development efforts is on improving the measurement of electron beam parameters. The parameters are closely related to the generation, emission, operation environment, and role of the electron beam and the corresponding medium. In this study, a field calculation method is proposed, and the electric field intensity distribution on the electron beam's cross-section is analyzed. The characteristics of beam diffusion caused by the space charge effect are investigated in simulation, and the obtained data are compared with the experiment. The simulation demonstrated that the cross-sectional electric field distribution is primarily affected by the electron beam current, current density distribution, and electron beam propagation speed.

关键词: electron beam, electric field distribution, space charge effect

Abstract: In electron beam technology, one of the critical focuses of research and development efforts is on improving the measurement of electron beam parameters. The parameters are closely related to the generation, emission, operation environment, and role of the electron beam and the corresponding medium. In this study, a field calculation method is proposed, and the electric field intensity distribution on the electron beam's cross-section is analyzed. The characteristics of beam diffusion caused by the space charge effect are investigated in simulation, and the obtained data are compared with the experiment. The simulation demonstrated that the cross-sectional electric field distribution is primarily affected by the electron beam current, current density distribution, and electron beam propagation speed.

Key words: electron beam, electric field distribution, space charge effect

中图分类号:  (Charged-particle beams)

  • 41.75.-i
41.85.-p (Beam optics) 41.85.Ew (Particle beam profile, beam intensity)