Space charge limited current of axisymmetric vacuum diode

Hao Jianhong; Cao Zhanguo; Zhou Qianhong

doi:10.11884/HPLPB201830.180201

Volume 30 Issue 12

Dec. 2018

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Article Navigation > High Power Laser and Particle Beams > 2018 > 30(12): 123001

Hao Jianhong, Cao Zhanguo, Zhou Qianhong. Space charge limited current of axisymmetric vacuum diode[J]. High Power Laser and Particle Beams, 2018, 30: 123001. doi: 10.11884/HPLPB201830.180201

Citation:

Hao Jianhong, Cao Zhanguo, Zhou Qianhong. Space charge limited current of axisymmetric vacuum diode[J]. High Power Laser and Particle Beams, 2018, 30: 123001. doi: 10.11884/HPLPB201830.180201

Hao Jianhong, Cao Zhanguo, Zhou Qianhong. Space charge limited current of axisymmetric vacuum diode[J]. High Power Laser and Particle Beams, 2018, 30: 123001. doi: 10.11884/HPLPB201830.180201

Citation:

Hao Jianhong, Cao Zhanguo, Zhou Qianhong. Space charge limited current of axisymmetric vacuum diode[J]. High Power Laser and Particle Beams, 2018, 30: 123001. doi: 10.11884/HPLPB201830.180201

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Space charge limited current of axisymmetric vacuum diode

doi: 10.11884/HPLPB201830.180201

1.
School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China
2.
Beijing Institute of Applied Physics and Computational Mathematics, Beijing 100094, China

Received Date: 2018-07-24
Rev Recd Date: 2018-10-10
Publish Date: 2018-12-15

Abstract

Abstract

Based on the ArcPIC code, this paper analyzes the distribution of electron density and the field on the cathode surface using the PIC-MCC method. At the same time, it gives the fitting formula of two-dimensional space charge limited current. This provides a theoretical reference for the design and application of vacuum diodes. It is found that the electric field of cathode surface increases with the increase of cathode current density, then oscillates and tends to a stable state. The two-dimensional space charge limited current density decreases with the increase of cathode emission radius, and the larger the cathode emission radius, the closer the current to the one-dimensional space charge limited current.
- vacuum diode,
- space charge limited current,
- PIC-MCC simulation

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References(16)

References

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