Heavy-particle hybrid simulation of a high-voltage glow discharge in helium

P. Hartmann, H. Matsuo, Y. Ohtsuka, M. Fukao, M. Kando, Z. Donkó

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Abstract

A high-voltage glow discharge - operated at several thousand Volts - is described by a hybrid model in which we apply kinetic simulation for the fast electrons and fast heavy particles (He+ ions and neutral atoms). In the model we take into account the increase of the gas temperature, and calculate the apparent secondary electron yield at the cathode from the flux-energy distributions of heavy particles. The results of the simulations show that electron production at the cathode is dominated by the impact of fast neutral atoms (ejecting ≈75% of the primary electrons) and that ionization of the gas atoms by fast heavy particles contributes significantly to the ionization balance of the discharge. A fair agreement is obtained between measured and calculated electrical characteristics and potential distributions, and the calculations confirm the existence of the high-energy electron beam observed experimentally.

Original languageEnglish
Pages (from-to)3633-3640
Number of pages8
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume42
Issue number6 A
Publication statusPublished - Jun 1 2003

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Keywords

  • Discharge simulation
  • Electron beam
  • Glow discharge
  • Heavy-particle processes
  • Hybrid modeling

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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