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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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| Cite this article: |
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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.
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| Keywords:
52.27.Lw
52.35.Fp
52.35.Sb
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Received: 28 September 2006
Published: 08 February 2007
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| PACS: |
52.27.Lw
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(Dusty or complex plasmas; plasma crystals)
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52.35.Fp
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(Electrostatic waves and oscillations (e.g., ion-acoustic waves))
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52.35.Sb
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(Solitons; BGK modes)
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