Roles of superthermal electrons and positrons on positron-acoustic solitary waves and double layers in electron–positron–ion plasmas

2014 ◽  
Vol 24 (3) ◽  
pp. 033130 ◽  
Author(s):  
M. S. Alam ◽  
M. J. Uddin ◽  
M. M. Masud ◽  
A. A. Mamun
Keyword(s):  
Solitary Waves ◽  
Double Layers ◽  
Superthermal Electrons ◽  
Electron Positron ◽  
Electrons And Positrons ◽  
Superthermal Electrons And Positrons

scholarly journals Ion acoustic quasi-soliton in an electron-positron-ion plasma with superthermal electrons and positrons

Open Physics ◽  
2018 ◽  
Vol 16 (1) ◽  
pp. 563-567 ◽  
Author(s):  
Jianyong Wang ◽  
Ying Zeng ◽  
Zufeng Liang ◽  
Yani Xu ◽  
Yuanxiang Zhang
Keyword(s):  
Acoustic Waves ◽  
Vries Equation ◽  
Reductive Perturbation Method ◽  
Superthermal Electrons ◽  
Ion Plasma ◽  
Electron Positron ◽  
Electrons And Positrons ◽  
Ion Acoustic ◽  
De Vries ◽  
Superthermal Electrons And Positrons

Abstract In this work, we are concerned with the ion acoustic quasi-soliton in an electron-positron-ion plasma with superthermal electrons and positrons. By using the reductive perturbation method, the Korteweg-de Vries equation is derived from the governing equations of ion acoustic waves. An interesting soliton-cnoidal wave solution of the Korteweg-de Vries equation and its quasi-soliton behaviour are presented. The influence of electron superthermality, positron superthermality and positron concentration ratio on characteristics of the quasi-soliton is confirmed to be significant.

Non-planar ion acoustic Gardner solitons in electron-positron-ion plasma with superthermal electrons and positrons

2012 ◽  
Vol 79 (1) ◽  
pp. 37-44 ◽  
Author(s):  
DEB KUMAR GHOSH ◽  
UDAY NARAYAN GHOSH ◽  
PRASANTA CHATTERJEE
Keyword(s):  
Reductive Perturbation Method ◽  
Superthermal Electrons ◽  
Ion Plasma ◽  
Electron Positron ◽  
Electrons And Positrons ◽  
Ion Acoustic Solitary Waves ◽  
Ion Acoustic ◽  
Basic Features ◽  
Superthermal Electrons And Positrons ◽  
Gardner Solitons

AbstractThe properties of non-planar (cylindrical and spherical) ion acoustic solitary waves (IASWs) in an unmagnetized collisionless electron-positron-ion (e-p-i) plasma, whose constituents are inertial ions and superthermal/non-Maxwellian electrons and positrons (represented by the kappa (κ) distribution), are investigated by deriving the modified Gardner (MG) equation. The well-known reductive perturbation method is employed to derive the MG equation. The basic features of non-planar IA Gardner solitons (GSs) are discussed. It is seen that the properties of non-planar IAGSs (positive and negative) differ significantly as the value of spectral index kappa changes.

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