Influence of ion-neutral collisional frequency and Kappa spectral index on dynamics of nonlinear ion-acoustic waves in superthermal plasmas
The present work investigates the propagation of nonlinear ion-acoustic waves in a collisional plasma with superthermal electrons and a Kappa distribution function. Considering the basic fluid equations and the ion-neutral collisions, a modified nonlinear Korteweg-de Vries (K-dV) equation is derived...
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| Format: | Article |
| Language: | fas |
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Nuclear Science and Technology Research Institute
2021-09-01
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| Series: | مجله علوم و فنون هستهای |
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| Online Access: | https://jonsat.nstri.ir/article_1296_7a5cc25fbccda920c279a230ecb3a47f.pdf |
| Summary: | The present work investigates the propagation of nonlinear ion-acoustic waves in a collisional plasma with superthermal electrons and a Kappa distribution function. Considering the basic fluid equations and the ion-neutral collisions, a modified nonlinear Korteweg-de Vries (K-dV) equation is derived using the reductive perturbation method. It was found that only compressive ion-acoustic solitary waves can be propagated in this model. Also, the numerical results show that ion-neutral collisions have significant effects on solitary wave structures. In other words, the amplitude (width) of the ion-acoustic solitons decreases (increases) with increasing the ion-neutral collision frequency. Moreover, the present plasma model has also studied the effects of the spectral index of superthermal electrons and ion temperature on the ion-acoustic solitons |
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| ISSN: | 1735-1871 2676-5861 |