Chin. Phys. Lett.  2007, Vol. 24 Issue (3): 767-770    DOI:
Original Articles |
Effect of Thermionic Emission on Dust-Acoustic Solitons in a Dust-Electron Plasma
REN Li-Wen;WANG Zheng-Xiong;LIU Yue;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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REN Li-Wen, WANG Zheng-Xiong, LIU Yue et al  2007 Chin. Phys. Lett. 24 767-770
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Abstract The effects of thermionic emission on dust-acoustic solitons with a very small but finite amplitude in a dust--electron plasma are studied using the reductive perturbation technique. The self-consistent variation of dust charge is taken into account. It is shown that the thermionic emission could significantly increase the dust positive charge. The dependences of the phase velocity, amplitude, and width of such solitons on the dust temperature and the dust work function of dust material are plotted and discussed.
Keywords: 52.27.Lw      52.35.Fp      52.35.Sb     
Received: 28 September 2006      Published: 08 February 2007
PACS:  52.27.Lw (Dusty or complex plasmas; plasma crystals)  
  52.35.Fp (Electrostatic waves and oscillations (e.g., ion-acoustic waves))  
  52.35.Sb (Solitons; BGK modes)  
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REN Li-Wen
WANG Zheng-Xiong
LIU Yue
WANG Xiao-Gang
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