Ion acoustic solitary waves in plasma with nonthermal electron, positron and warm ion

Abstract

In this paper, the characteristics of ion acoustic solitary waves are studied in plasmas containing warm ion fluid, non-thermally distributed electron and positron. We study the effects of non-thermal electrons and ion temperature on solitons by Pseudo-potential method and show that the parametric region where ion acoustic solitons can exist is modified. We also obtain linear dispersion relation by using the standard normal-modes analysis.

Modulation Instability of Ion-Acoustic Waves in Plasma with Nonthermal Electrons

“…For this, over the last two decades there has been a great deal of interest in the study of nonlinear wave phenomena in --plasmas [8][9][10][11][12]. Positrons are produced by pair production in high energy processes occurring in many astrophysical environments.…”

“…Hence it is interesting to study the nonlinear ion-acoustic waves in --plasma assuming simultaneous presence of nonthermal electrons, warm negative ions, and the positrons. Recently Pakzad [11] has shown that the presence of warm ions and nonthermal electrons can modify parametric regions of existence of ion-acoustic solitary waves. A nonlinear theory of ion-acoustic waves in --plasma has been developed by Dubinov and Sazonkin [26] considering polytropic laws of compression and rarefraction for all plasma components.…”

Effect of high relativistic ions on ion acoustic solitons in electron-ion-positron plasmas with nonthermal electrons and thermal positrons

“…In this case, two-component (e-i) plasmas become a three-component (e-i-p) medium (Shukla and Stenflo 1993;Tsintsadze et al 1994). During the last decade, e-p-i plasmas have attracted the attention of several authors (Popel et al 1995;Lakhina and Verheest 1997;Pakzad 2009). We know that when the ion velocity approaches the velocity of light, relativistic effects may significantly modify the behaviour of the solitary waves.…”

Ion acoustic solitary waves in a weakly relativistic plasma with q-nonextensive electrons and thermal positrons

“…In this case, two-component (e-i) plasmas become a threecomponent (e-i-p) medium (Surko and Murphy 1990). During the last decade, e-p-i plasmas have attracted the attention of several authors (Popel et al 1995;Nejoh 1997;Pakzad 2009aPakzad , 2009b. We know that the propagation of ion acoustic solitary waves is modified when the ion velocity approaches the speed of light.…”