Propagation of Solitary Waves in Warm Magnetized Plasma with Two Temperature Electrons

Nirupama Devi,Latika Kalita

doi:10.18052/www.scipress.com/bmsa.2.41

Nirupama Devi, Latika Kalita

Open Access

https://doi.org/10.18052/www.scipress.com/bmsa.2.41

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Abstract

Nonlinear wave structure of ion acoustic disturbances is investigated in magnetized plasma consisting of warm ions and two electron components, namely hot and cold. The basic set of fluid equations for the flow variables is reduced to a single equation known as Sagdeev Potential (SP) equation using non perturbative approach. The properties of solitary wave structures are studied by pseudo potential method, which is valid for arbitrary amplitude. The amplitude of the solitary waves and the depth of the potential well are found to decrease with the increase of the direction-cosine of the wave propagation. The ranges of temperature ratios (ion to electrons) for the existence of solitary waves and their effects on the plasma medium are studied in detail and presented graphically fordifferent sets of plasma parameters.

Highlights

The nonlinear propagation of electrostatic excitations in magnetized plasmas has received considerable attention in the last few decades as witnessed by the increasing number of publication [1,2,3,4,5,6,7]
To study the nonlinear waves we have considered the basic equations governing a plasma contaminated with the warm ions and two temperature electron distributions immersed in an uniform external magnetic field B0 = B0 zdirected along z- axis
In our present plasma model with warm ion and two electron temperature, we have investigated the formation of arbitrary amplitude compressive solitary waves

Summary

Introduction

The nonlinear propagation of electrostatic (e.g. ion acoustic) excitations in magnetized plasmas has received considerable attention in the last few decades as witnessed by the increasing number of publication [1,2,3,4,5,6,7] Such nonlinear excitations form specific structures of solitary ion acoustic waves in space regions of the Earth as well as in laboratories. We consider warm magnetized plasma model containing two temperature electron populations and see the propagation characteristic of ion acoustic solitons. In such plasma the occurrence of compressive/rarefactive solitons is questioned for sub-subsonic limits. In deriving the ideal evolution equations the pseudopotential method has been applied for a quasi-neutral condition for the plasma Such nonperturbative works are yet be done for magnetized plsma, as it is seen during.

Basic Equations

Results And Discussions

Conclusion