Open AccessHeat flux effect in ηi-mode driven solitary and shock waves in electron-positron-ion plasma
Author(s) -
Zakir Ullah,
AUTHOR_ID,
King Abdul Aziz,
Q. Haque,
Adil Murad,
Muhammad Sohail,
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AUTHOR_ID,
AUTHOR_ID,
AUTHOR_ID
Publication year - 2021
Publication title -
maǧallaẗ al-kuwayt li-l-ʿulūm
Language(s) - English
Resource type - Journals
eISSN - 2307-4116
pISSN - 2307-4108
DOI - 10.48129/kjs.v49i1.11491
Subject(s) - plasma , tokamak , physics , atomic physics , ion , heat flux , electron , dispersion relation , magnetic field , electron temperature , shock wave , condensed matter physics , mechanics , heat transfer , nuclear physics , quantum mechanics
The specific role of ion heat flux on the characteristics of the linear and nonlinear ion temperature gradient (ηi) driven mode in inhomogeneous electron-positron-ion plasma is presented. Inhomogeneity in density, temperature, and the magnetic field is considered. A modified linear dispersion relation is obtained, and its different limiting cases are when ηi 2/3, ωD(gradient in magnetic field) = 0 and β(density ratio of plasma species) = 1 are discussed. Furthermore, an expression for the anomalous transport coefficient of the present model is obtained. Nonlinear structure solutions in the form of solitons and shocks show that mode dynamics enhance in the presence of ion heat flux in electron-positron-ion plasma. The present study is essential in energy confinement devices such as tokamak because the heat flux observed experimentally in tokamak plasma is much higher than those described by collisions. Further, it could be helpful to understand the nonlinear electrostatic excitations in the interstellar medium.