Steady State of the Dusty Plasma in a dc Discharge

• 来源期刊: 中国物理快报（英文版）
• 学科: 物理学
• 年，卷（期）: 2002,（5）
• 页码范围: 695-697
• 页数: 3页
• 分类号: O4
• 语种: 英文

摘要

The steady state formed by the diffusion of plasma particles in an inhomogeneous dusty plasma is investigated theoretically and compared with our previous experimental results /Nucl. Fusion Plasma Phys. 20(2000)180 (in Chinese); Phys. Plasmas 8(2001)1459]. The negatively charged dust grains with an average charge number of the order of 105 on a single grain enhance the plasma inhomogeneity by decreasing the diffusion velocity, and can cause significant depletion of electrons. The theoretical electron density profile is in good agreement with the experiment, and the theoretical profile of the electron-to-ion density ratio is in reasonable agreement with experimentally estimated data.