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Dust Charging in the Sheath of an Electronegative Plasma |
| WANG Zheng-Xiong;WANG Wen-Chun;LIU Yue;LIU Jin-Yuan;WANG Xiao-Gang |
| State Key Laboratory of Materials Modification by Laser, Electron and Ion Beams, Department of Physics, Dalian University of Technology, Dalian 116024 |
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| Cite this article: |
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WANG Zheng-Xiong, WANG Wen-Chun, LIU Yue et al 2004 Chin. Phys. Lett. 21 697-699 |
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Abstract We theoretically investigate the dust charging in the sheath of an electronegative plasma, by using a single dust grain model based on a previous sheath structure [Chin. Phys. Lett 20 (2003) 1537] in which cold positive ions and hot negative ions have been assumed. It is found that dust grains are first charged negatively at the sheath edge and then begin to be charged positively in the sheath. Moreover, both the temperature ratio of electrons to negative ions and the density ratio of negative ions to positive ions have effects on the neutral point of the dust charge.
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| Keywords:
52.40.Kh
52.27.Cm
52.27.Lw
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Published: 01 April 2004
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| PACS: |
52.40.Kh
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(Plasma sheaths)
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52.27.Cm
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(Multicomponent and negative-ion plasmas)
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52.27.Lw
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(Dusty or complex plasmas; plasma crystals)
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