Damped dust-ion-acoustic solitons in collisional magnetized nonthermal plasmas

TL;DR

This paper theoretically investigates damped dust-ion-acoustic solitons in collisional, magnetized, nonthermal plasmas with dust particles, analyzing how plasma parameters and nonthermal effects influence solitary wave properties.

Contribution

It derives a damped KdV equation for dust-ion-acoustic waves in nonthermal plasmas considering ion-neutral collisions and analyzes the effects of plasma parameters and nonthermal index on soliton characteristics.

Findings

Ion-neutral collisions dampen the amplitude of solitary waves.

Nonthermal parameter $$ significantly affects wave speed and width.

Dissipative effects are crucial for understanding space and laboratory dusty plasmas.

Abstract

A multi-species magnetized collisional nonthermal plasma system containing inertial ion species, non-inertial electron species following nonthermal $\kappa-$ distribution, and immobile dust particles, is considered to examine the characteristics of the dissipative dust-ion-acoustic (DIA) soliton modes, \textbf{theoretically and parametrically}. The electrostatic solitary modes are found to be associated with the low frequency dissipative dust-ion-acoustic solitary waves (DIASWs). The ion-neutral collision is taken into account, and the influence of ion-neutral collisional effects on the dynamics of dissipative DIASWs is investigated. It is reported that most of the plasma mediums in space and laboratory are far from thermal equilibrium, and the particles in such plasma systems are well fitted via the $\kappa-$nonthermal distribution than via the thermal Maxwellian distribution. The reductive perturbation approach is adopted to derive the damped KdV (dKdV) equation, and the solitary wave solution of the dKdV equation is derived via the tangent hyperbolic method to analyze the basic features (amplitude, width, speed, time evolution, etc.) of dissipative DIASWs. The propagation nature and also the basic features of dissipative DIASWs are seen to influence significantly due to the variation of the plasma configuration parameters and also due to the variation of the supethermality index $\kappa$ in the considered plasma system. The implication of the results of this study could be useful for better understanding the electrostatic localized disturbances, in the ion length and time scale, in space and experimental dusty plasmas, where the presence of excess energetic electrons and ion-neutral collisional damping are accountable.