ELECTRON TRANSPORT BEHAVIOURS IN THE NITROGEN DIRECT CURRENT GLOW DISCHARGE

• 来源期刊: 中国物理（英文版）
• 学科: 物理学
• 关键词: Monte Carlo simulation nitrogen direct current glow discharge mechanism of active species generation
• 年，卷（期）: 2001,（7）
• 所属期刊栏目: FLUIDS，PLASMAS AND ELECTRIC DISCHARGES
• 页码范围: 639-644
• 页数: 6页
• 分类号: O4
• 语种: 英文

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.