Steady State of the Dusty Plasma in a dc Discharge |
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作者姓名: | 马锦秀 郁明阳 |
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作者单位: | [1]DepartmentofModernPhysics,UniversityofScienceandTechnologyofChina,Hefei230027 [2]Ruhr-UniversitatBochum,InstitutfurTheoretischePhysikI,D-44780Bochum,Germany |
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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 10^5 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.
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关 键 词: | 等离子体 直流放电 粉状等离子体稳定态 |
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