Chin. Phys. Lett.  2004, Vol. 21 Issue (4): 697-699    DOI:
Original Articles |
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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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.
Keywords: 52.40.Kh      52.27.Cm      52.27.Lw     
Published: 01 April 2004
PACS:  52.40.Kh (Plasma sheaths)  
  52.27.Cm (Multicomponent and negative-ion plasmas)  
  52.27.Lw (Dusty or complex plasmas; plasma crystals)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2004/V21/I4/0697
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WANG Zheng-Xiong
WANG Wen-Chun
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WANG Xiao-Gang
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