Spontaneous magnetic field in the interactions of transverse plasmons with electron-positron-ion plasma

AbstractA possibility of relaxation of relativistically hot electron and positron (e − p) plasma with a small fraction of hot or cold ions has been investigated analytically. It is observed that a strong interaction of plasma flow and field leads to a non-force-free relaxed magnetic field configuration governed by the triple curl Beltrami (TCB) equation. The triple curl Beltrami (TCB) field composed of three different Beltrami fields gives rise to three multiscale relaxed structures. The results may have the strong relevance to some astrophysical and laboratory plasmas.

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Heat flux effect in ηi-mode driven solitary and shock waves in electron-positron-ion plasma

Kuwait Journal of Science ◽

10.48129/kjs.v49i1.11491 ◽

2021 ◽

Vol 49 (1) ◽

Author(s):

U. Zakir ◽

◽

K. Aziz ◽

Q. Haque ◽

A. Murad ◽

...

Keyword(s):

Magnetic Field ◽

Heat Flux ◽

Density Ratio ◽

Tokamak Plasma ◽

Ion Temperature ◽

Linear Dispersion ◽

Ion Temperature Gradient ◽

Ion Plasma ◽

Electron Positron ◽

Solitary And Shock Waves

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.

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On the effect of baryon loading in magnetized counterstreaming plasmas. I. Analytical investigation

Journal of Plasma Physics ◽

10.1017/s0022377807006563 ◽

2008 ◽

Vol 74 (1) ◽

pp. 79-90 ◽

Cited By ~ 5

Author(s):

R. C. TAUTZ ◽

J.-I. SAKAI

Keyword(s):

Magnetic Field ◽

Growth Rates ◽

Analytical Investigation ◽

Linear Dispersion ◽

Particle Species ◽

Ion Plasma ◽

Electron Positron ◽

Background Magnetic Field ◽

Unmagnetized Plasma ◽

Homogeneous Background

AbstractAssuming a non-relativistic three species electron–positron–ion plasma, the counterstreaming instability is investigated for waves propagating parallel and perpendicular to a homogeneous background magnetic field. From the exact linear dispersion relations, it is shown analytically how the growth rates change with increasing baryon loading, revealing new characteristics that cannot be found either for an unmagnetized plasma involving three particle species or for a plasma with only two particle species.

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Oblique Propagation of Electrostatic Waves in a Magnetized Electron-Positron-Ion Plasma in the Presence of Heavy Particles

Zeitschrift für Naturforschung A ◽

10.1515/zna-2017-0419 ◽

2018 ◽

Vol 73 (6) ◽

pp. 501-509 ◽

Cited By ~ 1

Author(s):

M. Sarker ◽

M. R. Hossen ◽

M. G. Shah ◽

B. Hosen ◽

A. A. Mamun

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Solitary Wave Solution ◽

Heavy Ion ◽

Nonlinear Propagation ◽

Heavy Particles ◽

Ion Plasma ◽

Electron Positron ◽

Electrons And Positrons ◽

Basic Features

AbstractA theoretical investigation is carried out to understand the basic features of nonlinear propagation of heavy ion-acoustic (HIA) waves subjected to an external magnetic field in an electron-positron-ion plasma that consists of cold magnetized positively charged heavy ion fluids and superthermal distributed electrons and positrons. In the nonlinear regime, the Korteweg-de Vries (K-dV) and modified K-dV (mK-dV) equations describing the propagation of HIA waves are derived. The latter admits a solitary wave solution with both positive and negative potentials (for K-dV equation) and only positive potential (for mK-dV equation) in the weak amplitude limit. It is observed that the effects of external magnetic field (obliqueness), superthermal electrons and positrons, different plasma species concentration, heavy ion dynamics, and temperature ratio significantly modify the basic features of HIA solitary waves. The application of the results in a magnetized EPI plasma, which occurs in many astrophysical objects (e.g. pulsars, cluster explosions, and active galactic nuclei) is briefly discussed.

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On the effect of baryon loading in magnetized counterstreaming plasmas. II. Particle-in-cell simulations

Journal of Plasma Physics ◽

10.1017/s0022377808007216 ◽

2008 ◽

Vol 74 (6) ◽

pp. 815-826 ◽

Cited By ~ 2

Author(s):

R. C. TAUTZ ◽

J.-I. SAKAI

Keyword(s):

Magnetic Field ◽

Particle In Cell ◽

Particle Species ◽

Ion Plasma ◽

Electron Positron ◽

Background Magnetic Field ◽

Self Consistent ◽

Homogeneous Background

AbstractAssuming a non-relativistic three species electron–positron–ion plasma, the counterstreaming instability is investigated for waves propagating parallel and perpendicular to a homogeneous background magnetic field. To support previous analytical investigations (Tautz and Sakai 2007), the instability is investigated by means of self-consistent particle-in-cell simulations. It is shown that the presence of a third particle species is responsible for a variety of new features that cannot be seen either from an electron–ion plasma or for an electron–positron plasma.

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