Ion Acoustic Waves in Plasma With Perturbation in Ion Temperature

Abstract

The behavior of ion acoustic solitary waves (IASWs) in an electron-ion plasma with spatially varying ion temperatures is studied using the reductive perturbation method. In this case, the relative temperature ( $\sigma $ ) is considered a first-order perturbation. The modified Korteweg-de Vries (mKdV) equation is obtained to describe the wave behavior in which $\sigma $ is a critical parameter of the model. The propagated localized ion-acoustic wave is affected by the temperature perturbation area while the amplitude of the ion acoustic soliton decreases after the interaction with perturbation.