ON PROGRESSIVE WAVE SOLUTION FOR NON-PLANAR KDV EQUATION IN A PLASMA WITH q-NONEXTENSIVE ELECTRONS AND TWO OPPOSITELY CHARGED IONS

Abstract

In this paper, the ion-acoustic wave is investigated in a plasma with qnonextensive electrons and two oppositely charged ions with varying masses. These parameters are found to modify the linear dispersion relation and nonlinear solitary structures. The reductive perturbation method is employed to derive modified Korteweg-de Vries KdV equation. To solve the obtained governing evolution equation, the exact solution in the planar geometry is obtained and used to obtain an analytical approximate progressive wave solution for the nonplanar evolution equation. The analytical approximate solution so obtained is compared with the numerical solution of the same nonplanar evolution equation and the results are presented in 2D and 3D figures. The results revealed that both solutions are in good agreement. A parametric study is carried out to investigate the effect of different physical parameters on the nonlinear evolution solution behavior. The obtained solution allows us to study the impact of various plasma parameters on the behavior of the nonplanar ion-acoustic solitons. The suitable application of the present investigations can be found in laboratory plasmas, where oppositely charged ions and nonthermal electrons dwell.

Keywords

• Nonplanar solitons,Modified KdV,Cylindrical and spherical solitons,Electronegative plasmas,Analytical approximate solutions

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