Surface Potential of Dust Grains at the Sheath Edge of Electronegative Dusty Plasmas |
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| Authors: | Duan Ping Wang Zhengxiong Wang WenchunLiu Jinyuan Liu Yue Wang Xiaogang |
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| Affiliation: | Department of Physics, Dalian University, Dalian 116622, China;State Key Lab.of Materials Modification by Laser, Electron and Ion Beams Department of Physics, Dalian University of Technology, Dalian 116024, China;State Key Lab.of Materials Modification by Laser, Electron and Ion Beams Department of Physics, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | In this paper we investigate the dust surface potential at the sheath edge of electronegative dusty plasmas theoretically, using the standard fluid model for the sheath and treating electrons and negative ions as Boltzmann particles but positive ions and dust grains as cold fluids.The dust charging model is self-consistently coupled with the sheath formation criterion by the dust surface potential and the ion Mach number, moreover the dust density variation is taken into account. The numerical results reveal that the dust number density and negative ion number density as well as its temperature can significantly affect the dust surface potential at the sheath edge. |
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| Keywords: | electronegative plasma dust grain dust surface potential |
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