中国物理B ›› 2001, Vol. 10 ›› Issue (7): 639-644.doi: 10.1088/1009-1963/10/7/311

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ELECTRON TRANSPORT BEHAVIOURS IN THE NITROGEN DIRECT CURRENT GLOW DISCHARGE

张连珠, 于威, 王久丽, 韩理, 傅广生   

  1. Department of Physics, Hebei University, Baoding 071002, China
  • 收稿日期:2000-08-19 修回日期:2001-03-02 出版日期:2001-07-15 发布日期:2005-06-12
  • 基金资助:
    Project supported by the Natural Science Foundation of Hebei Province, China (Grant No. 597058).

ELECTRON TRANSPORT BEHAVIOURS IN THE NITROGEN DIRECT CURRENT GLOW DISCHARGE

Zhang Lian-zhu (张连珠), Yu Wei (于威), Wang Jiu-li (王久丽), Han Li (韩理), Fu Guang-sheng (傅广生)   

  1. Department of Physics, Hebei University, Baoding 071002, China
  • Received:2000-08-19 Revised:2001-03-02 Online:2001-07-15 Published:2005-06-12
  • Supported by:
    Project supported by the Natural Science Foundation of Hebei Province, China (Grant No. 597058).

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摘要： A Monte Carlo simulation is presented to describe the electron transport behaviours in the nitrogen direct current glow discharge. The energy and angular distributions of the electrons at different positions of the cathode dark space are calculated; their energy and density distribution features throughout the entire discharge are discussed. The influence of molecular vibrational excitation, typical for electron－molecule collisions, has been studied and the elementary process of active species generation has been illustrated. The simulated results reveal that, in the cathode dark space, the high-energy electrons are mainly forward scattering and behave as a high-energy ‘electron beam'. The sharp increase of the number of secondary electrons plays an important role in producing active species at the interface between the cathode dark space and the negative glow region. The vibrational excitation enhances the energy loss of electrons in the negative glow region.

Abstract: A Monte Carlo simulation is presented to describe the electron transport behaviours in the nitrogen direct current glow discharge. The energy and angular distributions of the electrons at different positions of the cathode dark space are calculated; their energy and density distribution features throughout the entire discharge are discussed. The influence of molecular vibrational excitation, typical for electron－molecule collisions, has been studied and the elementary process of active species generation has been illustrated. The simulated results reveal that, in the cathode dark space, the high-energy electrons are mainly forward scattering and behave as a high-energy ‘electron beam'. The sharp increase of the number of secondary electrons plays an important role in producing active species at the interface between the cathode dark space and the negative glow region. The vibrational excitation enhances the energy loss of electrons in the negative glow region.

Key words: Monte Carlo simulation, nitrogen direct current glow discharge, mechanism of active species generation

中图分类号:  (Glow; corona)

  • 52.80.Hc
52.65.Pp (Monte Carlo methods) 52.20.Hv (Atomic, molecular, ion, and heavy-particle collisions) 34.50.Ez (Rotational and vibrational energy transfer) 34.80.Gs (Molecular excitation and ionization)