Effect of nonisothermal electrons on dressed soliton in ion beam plasma system

Abstract

Using the reductive perturbation method (RPM) evolution equations, governing the first and second order potentials for ion acoustic wave in an ion beam plasma system with nonisothermal electrons, are derived. Adopting renormalization procedure of Kodama and Taniuti [J. Phys. Soc. Jpn. 45, 298 (1978)] nonsecular dressed soliton solution of these coupled equations is determined. An alternative approach is also used to obtain large amplitude soliton solution, retaining higher order nonlinearities in the expansion of the Sagdeev potential and integrating the resulting energy equation for the system. For small amplitude approximation, this solution reduces to dressed soliton solution obtained for the system using the renormalization in the RPM. Variation of the amplitude (A), velocity (λ), width (W), and the product amplitude×width4 (AW4) are numerically studied for the Korteweg–de Vries, dressed and large amplitude soliton for different values of parameters of the beam-plasma system, and results are summarized.