中国物理B ›› 1996, Vol. 5 ›› Issue (2): 100-112.doi: 10.1088/1004-423X/5/2/003

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇    下一篇

ELECTRON TRANSPORT BEHAVIOR IN NORMAL AND ABNORMAL DIRECT CURRENT DISCHARGE CATHODE SHEATH

魏合林1, 刘祖黎1, 刘大明1, 李再光2, 陆冬生2   

  1. (1)Department of Physics, Huazhong University of Science and Technology, Wuhan 4300074, China; (2)Stale Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China
  • 收稿日期:1994-12-27 出版日期:1996-02-20 发布日期:1996-02-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China.

ELECTRON TRANSPORT BEHAVIOR IN NORMAL AND ABNORMAL DIRECT CURRENT DISCHARGE CATHODE SHEATH

WEI HE-LIN (魏合林)a, LIU ZU-LI (刘祖黎)a, LIU DA-MIANG (刘大明)a, LI ZAI-GUANG (李再光)b, LU DONG-SHENG (陆冬生)b   

  1. a Department of Physics, Huazhong University of Science and Technology, Wuhan 4300074, China; b Stale Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:1994-12-27 Online:1996-02-20 Published:1996-02-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China.

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摘要： This paper studies the electron transport behavior in normal and abnormal helium direct current (dc) glow discharges using a Monte Carlo simulation, in which the influences of the electron initial energy and cathode surface reflection on the electron swarm behavior are considered. The electron-neutral atom collision processes and the electron swarm parameters (such as the number of collisions, collision rates, ionization coefficient, mean drift velocity, electron density, etc.) are analyzed. The results show that the variations of the initial energy of the electron emitted from the cathode and the cathode reflection cause a weak effect on the electron transport parameters in the two discharges. The results also indicate that the electron transport parameters are quite different in normal and abnormal discharges.

Abstract: This paper studies the electron transport behavior in normal and abnormal helium direct current (dc) glow discharges using a Monte Carlo simulation, in which the influences of the electron initial energy and cathode surface reflection on the electron swarm behavior are considered. The electron-neutral atom collision processes and the electron swarm parameters (such as the number of collisions, collision rates, ionization coefficient, mean drift velocity, electron density, etc.) are analyzed. The results show that the variations of the initial energy of the electron emitted from the cathode and the cathode reflection cause a weak effect on the electron transport parameters in the two discharges. The results also indicate that the electron transport parameters are quite different in normal and abnormal discharges.

中图分类号:  (Transport properties)

  • 52.25.Fi
52.40.Hf (Plasma-material interactions; boundary layer effects) 52.80.Hc (Glow; corona) 52.65.Pp (Monte Carlo methods) 52.20.Fs (Electron collisions) 52.20.Hv (Atomic, molecular, ion, and heavy-particle collisions)