计算物理 ›› 2003, Vol. 20 ›› Issue (5): 403-407.

• 论文 • 上一篇    下一篇

宏观放电参数对快原子态氮(N+,Nf)的影响

张连珠   

  1. 河北师范大学物理学院, 河北 石家庄 050016
  • 收稿日期:2002-07-15 修回日期:2002-12-06 出版日期:2003-09-25 发布日期:2003-09-25
  • 作者简介:张连珠(1957-),女,河北张家口,副教授,主要从事辉光放电等离子动力学方面的研究.
  • 基金资助:
    河北省自然科学基金(100064)资助项目

Effects of Discharge Parameters upon Fast Atomic Species (N+,Nf)

ZHANG Lian-zhu   

  1. College of Physics, Hebei Normal University, Shijiazhuang 050016, China
  • Received:2002-07-15 Revised:2002-12-06 Online:2003-09-25 Published:2003-09-25

摘要: 采用氮直流辉光放电等离子体中快电子和重粒子(N2+,N+,Nf)混合的蒙特卡罗方法,模拟研究了快原子态粒子(N+,Nf)的产生率及轰击阴极的能量分布随宏观放电参数(P,V)的变化规律.结果表明,存在一最佳放电条件,使阴极壁处粒子(N+,Nf)的粒子数密度大且能量高;当电压大于800V时,轰击阴极的活性粒子(N+,Nf),主要由N2+-N2离解过程产生,电压小于300V时,主要由e--N2离解过程产生,模拟结果与实验结果相符合.

关键词: 氮直流辉光放电, 蒙特卡罗模拟方法, 快原子态氮粒子, N2+-N2碰撞离解

Abstract: Using a Combination of Monte Carlo models of fast electron and species (N2+,N+,Nf), the creation rates and the energy distributions of species (N+,Nf) at the cathode in nitrogen glow discharge under different discharge conditions are studied.It is shown that the total density of N+ and Nf depends on the creation rate of ions(N2+,N+) and the thermalization of Nf, and species(N+,Nf) bombarding negative wall is mainly produced by N2+-N2s dissociation at higher voltages,but mainly produced by e--N2s dissociation at lower voltages.

Key words: nitrogen dc glow discharge, Monte Carlo simulation, fast nitrogen atomic species, N2+-N2 dissociation collision

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