Plasma simulation to analyze velocity distribution characteristics of pseudospark-sourced electron beam

doi:10.1088/1674-1056/aba274

中国物理B ›› 2020, Vol. 29 ›› Issue (10): 105101-.doi: 10.1088/1674-1056/aba274

Hai-Long Li(李海龙)¹^,†(), Chen-Fei Hu(胡陈飞)¹, Che Xu(徐彻)¹, Yong Yin(殷勇)¹, Bin Wang(王彬)¹, Lin Meng(蒙林)¹, Mao-Yan Wang(王茂琰)²

收稿日期:2020-02-25 修回日期:2020-06-26 接受日期:2020-07-03 出版日期:2020-10-05 发布日期:2020-10-05
通讯作者: Hai-Long Li(李海龙)

Plasma simulation to analyze velocity distribution characteristics of pseudospark-sourced electron beam

Hai-Long Li(李海龙)^1,†, Chen-Fei Hu(胡陈飞)¹, Che Xu(徐彻)¹, Yong Yin(殷勇)¹, Bin Wang(王彬)¹, Lin Meng(蒙林)¹, and Mao-Yan Wang(王茂琰)²

¹ School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China
² School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China

Received:2020-02-25 Revised:2020-06-26 Accepted:2020-07-03 Online:2020-10-05 Published:2020-10-05
Contact: ^†Corresponding author. E-mail: hailong703@163.com
About author:
†Corresponding author. E-mail: hailong703@163.com
* Project supported by the Sichuan Science and Technology Program, China (Grant No. 2019YJ0188) and the National Natural Science Foundation of China (Grant Nos. 61671116 and 11905026).

摘要/Abstract

Abstract:

Pseudospark-sourced electron beam is a promising candidate for driving vacuum electronic devices to generate millimeter wave and terahertz wave radiation as it has a very high combined beam current density. However, the inherent velocity spread of the beam, which is difficult to measure in experiment, has a great influence on the operating frequency and efficiency of the vacuum electronic device. In this paper, the velocity distribution characteristics of the electron beam produced by a single-gap hollow cathode electron gun are numerically studied and a three-dimensional kinetic plasma simulation model of a single-gap hollow cathode electron gun is built by using particle in cell and Monte Carlo collision methods in Vorpal. Based on the simulation model, the time-dependent evolution of the plasma formation inside the hollow cathode and electron beam generation process are observed. It is demonstrated that the pseudospark-sourced electron beam has a relatively large velocity spread. The time-dependent velocity distribution of the beam is analyzed, and the dependence of the beam velocity distribution under various operating conditions such as anode–cathode potential difference, gas pressure, and cathode aperture size are also studied.

Key words: pseudospark, hollow cathode, vacuum electronic devices, discharge

中图分类号: (Electrical properties)

51.50.+v

29.25.-t (Particle sources and targets) 29.25.Bx (Electron sources)

Hai-Long Li(李海龙), Chen-Fei Hu(胡陈飞), Che Xu(徐彻), Yong Yin(殷勇), Bin Wang(王彬), Lin Meng(蒙林), Mao-Yan Wang(王茂琰). [J]. 中国物理B, 2020, 29(10): 105101-.

Hai-Long Li(李海龙)†, Chen-Fei Hu(胡陈飞), Che Xu(徐彻), Yong Yin(殷勇), Bin Wang(王彬), Lin Meng(蒙林), and Mao-Yan Wang(王茂琰). Plasma simulation to analyze velocity distribution characteristics of pseudospark-sourced electron beam[J]. Chin. Phys. B, 2020, 29(10): 105101-.

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Collision	elastic collisions between electrons and argon atoms
	excitation collisions between electrons and argon atoms
	ionization collisions between electrons and argon atoms
Boundary	electrons and argon ions absorbed by metal boundary
	secondary electrons from argon ions impacting on the metal surfaces

Plasma simulation to analyze velocity distribution characteristics of pseudospark-sourced electron beam

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