Ion-acoustic solitons in a plasma consisting of positive and negative ions with nonisothermal electrons

Abstract

In this research paper, the authors study the propagation of ion-acoustic solitons in a plasma consisting of warm positive and negative ions with different concentration of masses, charged states, and nonisothermal electrons. To account for the full nonlinearity of plasma equations, a quasipotential method is used here. The potential so obtained is characterized for solitons as a function of Mach number, positive and negative ions temperature, nonisothermal electrons, different concentration of negative and positive ions over a wide range of parameter space. Corresponding to isothermal case with β=1, coexistence of compressive and rarefactive solitons is obtained. For non-negative β≠1, only compressive solitons are observed. The prediction, that with introduction of negative ions there exists a critical ion concentration below which compressive solitons exist and above which rarefactive solitons exist, is ruled out for nonisothermal electrons.

Higher-Order Nonlinear Effects on Wave Structures in a Multispecies Plasma with Nonisothermal Electrons

“…Moreover, the plasmas excited by an electron beam evolve towards a coherent trapped particle state rather than developing into a turbulent one as has been confirmed by experiments [36]. As a matter of fact, trapping can occur and contribute even for infinite small amplitude [37]. Several investigations, earlier [32,33,38] as well as the recent ones [37,39,40], have been reported on the study of ion-acoustic solitons with vortex-like distributions.…”

“…As a matter of fact, trapping can occur and contribute even for infinite small amplitude [37]. Several investigations, earlier [32,33,38] as well as the recent ones [37,39,40], have been reported on the study of ion-acoustic solitons with vortex-like distributions. The presence of trapped and free particles can significantly modify the characteristics in collisionless plasmas [32,38].…”

Modified KdV equation for trapped ions in polarized dusty plasma

“…However, Schamel developed a different nonlinear method called the pseudo-potential method to construct equilibrium solutions [12,13]. Recently, a large number of investigations with trapped particles distribution have been reported in different kinds of plasmas in the frame work of reductive perturbation and Sagdeev pseudo-potential method [14,15]. Rahman et al [16] studied the DA solitary waves in unmagnetized dusty plasma composed of vortex-like (trapped) ions, and arbitrarily charged dust grains.…”

Electrostatic Solitary Waves in Pair-ion Plasmas with Trapped Electrons

“…The authors are discussing the applicability of work in the doped pair ion plasmas, not completely filtered and enriched with an extra massive charged component (e.g., dust defects). We in this work used the same method as adopted by [20,21] in the PI plasmas in the presence of non-isothermal electrons but for specific subsonic adiabatic density compression. Also, we explain the large amplitude soliton in detail with mixed nonlinearity due to resonant electron contribution in the absence of any dust defects.…”

“…Very recently, some authors [18,19] have studied the complex plasma dynamics by using the vortex-like electron distribution deriving the nonlinear evolution equations by using either a pseudo potential approach or the reductive perturbation technique. Some authors [20] have studied the ion-acoustic solitons in a plasma composed of warm positive and negative ions with different concentration of masses, charged states, and nonisothermal electrons, by using quasipotential method. Dust ion acoustic solitons in an unmagnetized pair-ion plasmas with adiabatic pair-ions, non-isothermal electrons, and negatively charged background dust were studied by Mushtaq et al [21] by using both the small and arbitrary amplitude techniques.…”