Analysis of dusty plasma in the positive column of glow discharges
Wang De-Zhen (王德真), Wu Hong-Tao (吴洪涛)
State Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams, Department of Physics, Dalian University of Technology, Dalian 116023, China
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.
Received: 31 December 2001
Revised: 28 February 2002
Accepted manuscript online:
Fund: 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).
Cite this article:
Wang De-Zhen (王德真), Wu Hong-Tao (吴洪涛) Analysis of dusty plasma in the positive column of glow discharges 2002 Chinese Physics 11 799
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