Improving the validity of electron gun simulations; Theoretical and experimental approaches

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  • Amin Ali Sadraei Javaheri1,
  • Fazel Jahangiri*1,
  • Shahin Sanaye Hajari2,
  • Mohammad Hossein Ranjbar3,
  • Reza Panahi4,
  • Ali Reza Niknam1,
  1. Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
  2. Nuclear Science and Technology Research Institute, Atomic Energy Organization, Tehran, Iran
  3. Faculty of Electrical Engineering, Shahid Beheshti University, Tehran, Iran
  4. Department of Radiation Application, Shahid Beheshti University, Tehran, Iran
Improving the validity of electron gun simulations; Theoretical and experimental approaches

Received: 2024-02-18

Revised: 2024-04-01

Accepted: 2024-04-05

Published 2024-05-25

Copyright (c) 2024 Amin Ali Sadraei Javaheri, Fazel Jahangiri, Shahin Sanaye Hajari, Mohammad Hossein Ranjbar, Reza Panahi, Ali Reza Niknam (Author)

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

1.
Sadraei Javaheri AA, Jahangiri F, Sanaye Hajari S, Ranjbar MH, Panahi R, Niknam AR. Improving the validity of electron gun simulations; Theoretical and experimental approaches. J Theor Appl phys. 2024 May 25;18(3). Available from: https://oiccpress.com/jtap/article/view/8256

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Abstract

Developing applications of high energy electron beams have motivated various researches on
design, simulation, fabrication and utilization of professional electron guns. The validity of
the simulations is always an essential question prior to the fabrication process. However, the
simulation results could be pronouncedly misleading when imprecise setting of input parameters
are chosen. In this article, we discuss how the simulation parameters including the mesh size,
virtual cathode distance, relaxation parameter and appropriate particle emission characteristics
should be adjusted in order to provide reliable simulation results. We discuss the validity of the
DC electron gun simulation in CST PARTICLE STUDIO, as a widely used software for such
purposes, by comparing the results obtained by two following approaches; simulating with exact
theoretical solution and comparing the results with those obtained experimentally. The perveance
of the electron gun and the beam emittance are considered as the most important parameters to be
compared. Our results reveal that validation is necessary and without it, the simulation results do
not have proper reliance.

Keywords

  • Electron gun simulation,
  • Validation,
  • CST PARTICLE STUDIO,
  • Perveance,
  • Emittance
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