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Large-amplitude dust acoustic solitons in an opposite polarity dusty plasma with generalized polarization force |
| Mahmood A. H. Khaled1, Mohamed A. Shukri2, and Yusra A. A. Hager3,† |
1 Department of Physics, Faculty of Education(Al-Mahweet), Sana'a University, Sana'a, Yemen;
2 Department of Physics, Faculty of Science, Sana'a University, Sana'a, Yemen;
3 Department of Physics, Faculty of Education, Sana'a University, Sana'a, Yemen |
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Abstract Linear and nonlinear dust acoustic (DA) waves have been investigated in an opposite polarity dusty plasma comprising negatively and positively charged dust grains, Maxwellian electrons and ions, including the generalized polarization force effect. The properties of linear DA waves have been significantly altered by the dual dust polarity and polarization force. Large amplitude DA solitons have been discussed in the framework of the Sagdeev potential technique. Our results show that both rarefactive and compressive solitons can exist in such a dusty plasma. The basic features of the Sagdeev potential have been examined under the effect of the polarization force parameter R, the ratio of the charge number of the positive dust to that of the negative dust Z, and the Mach number M. The results show that these parameters play a significant role in determining the region of existence of large amplitude DA solitons.
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Received: 24 January 2021
Revised: 16 May 2021
Accepted manuscript online: 24 May 2021
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PACS:
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05.45.Yv
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(Solitons)
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52.27.Lw
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(Dusty or complex plasmas; plasma crystals)
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94.05.Fg
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(Solitons and solitary waves)
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Corresponding Authors:
Yusra A. A. Hager
E-mail: hager22013@gmail.com
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Cite this article:
Mahmood A. H. Khaled, Mohamed A. Shukri, and Yusra A. A. Hager Large-amplitude dust acoustic solitons in an opposite polarity dusty plasma with generalized polarization force 2022 Chin. Phys. B 31 010505
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