Nonlinear Ion‐Acoustic Solitary Waves and Double Layers in Multicomponent Plasmas

Abstract

AbstractIn sequel to earlier observations on soliton dynamics in the plasmas, a few more features on solitons and double layers have been studied in a nonisothermal plasma conceiving multi‐temperature electrons. The basic equations governing the plasma dynamics, based on quasipotential analysis, are first reduced to an energy integral equation known as Sagdeev potential equation, to elucidates the salient features plasma of acoustic modes associating to those furthered in laboratory and space plasmas. The Sagdeev potential equation, under small amplitude approximation derives various kinds of Korteweg de Vries (K‐dV) equations in nonisothermal plasma and is solved by employing a modified approach of simple wave solution technique called as tanh‐method. The analyses show, under certain conditions, the remarkable properties of soliton propagation and double layers of compressive and rarefactive nature in the plasmas. The outcome of the observations could be of interest further in understanding the features of various plasma acoustic waves in laboratory and space plasmas.