中国物理B ›› 2002, Vol. 11 ›› Issue (8): 799-803.doi: 10.1088/1009-1963/11/8/309

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

Analysis of dusty plasma in the positive column of glow discharges

王德真, 吴洪涛   

  1. State Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams, Department of Physics, Dalian University of Technology, Dalian 116023, China
  • 收稿日期:2001-12-31 修回日期:2002-02-28 出版日期:2005-06-12 发布日期:2005-06-12
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 19875006) and the Doctoral Programme Foundation of the Institutions of Higher Education of China (Grant No 98014109).

Analysis of dusty plasma in the positive column of glow discharges

Wang De-Zhen (王德真), Wu Hong-Tao (吴洪涛)   

  1. State Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams, Department of Physics, Dalian University of Technology, Dalian 116023, China
  • Received:2001-12-31 Revised:2002-02-28 Online:2005-06-12 Published:2005-06-12
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 19875006) and the Doctoral Programme Foundation of the Institutions of Higher Education of China (Grant No 98014109).

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摘要： The radial distributions of ions, electrons and dust particles in the positive column of glow discharges are investigated in a triple-pole diffusion model. The dust particles are mainly trapped in the region around the column axis where the electrostatic potential is the highest. The presence of the dust particles results in the ion density increasing and the electron density decreasing in the dust-trapped region. The dust-trapped region is wider for a higher dust temperature or a smaller particulate radius. The ions and electrons in the dust-free region away from the column axis are in ambipolar diffusion.

Abstract: The radial distributions of ions, electrons and dust particles in the positive column of glow discharges are investigated in a triple-pole diffusion model. The dust particles are mainly trapped in the region around the column axis where the electrostatic potential is the highest. The presence of the dust particles results in the ion density increasing and the electron density decreasing in the dust-trapped region. The dust-trapped region is wider for a higher dust temperature or a smaller particulate radius. The ions and electrons in the dust-free region away from the column axis are in ambipolar diffusion.

Key words: dusty plasma, positive column, diffusion

中图分类号:  (Dusty or complex plasmas; plasma crystals)

  • 52.27.Lw
52.80.Hc (Glow; corona) 52.25.Fi (Transport properties)