Soliton propagation in a moving electron-positron pair plasma having negatively charged dust grains

2012 ◽  
Vol 19 (3) ◽  
pp. 032107 ◽  
Author(s):  
Rakhee Malik ◽  
Hitendra K. Malik ◽  
Subhash C. Kaushik
Keyword(s):  
Charged Dust ◽  
Dust Grains ◽  
Soliton Propagation ◽  
Pair Plasma ◽  
Electron Positron ◽  
Electron Positron Pair

scholarly journals Progress Towards a Laser Produced Relativistic Electron-Positron Pair Plasma

2016 ◽  
Vol 688 ◽  
pp. 012010 ◽  
Author(s):  
Hui Chen ◽  
J. Bonlie ◽  
R. Cauble ◽  
F. Fiuza ◽  
W. Goldstein ◽  
...  
Keyword(s):  
Relativistic Electron ◽  
Pair Plasma ◽  
Electron Positron ◽  
Electron Positron Pair

scholarly journals Modes of Energy Loss from Isolated Magnetized Neutron Star

1987 ◽  
Vol 125 ◽  
pp. 450-450
Author(s):  
S. Shibata
Keyword(s):  
Magnetic Field ◽  
Neutron Star ◽  
Gamma Ray ◽  
Rotational Energy ◽  
Pair Creation ◽  
Dipole Radiation ◽  
Pair Plasma ◽  
Electron Positron ◽  
Closed Current ◽  
Electron Positron Pair

Pulsar may be regarded as a discharge tube by electron-positron pair creation. On this viewpoint we carry out two numerical calculations. The obtained magnetic field is consistent with the flow. We find that pulsars emit their rotational energy through three modes simultaneously. The three modes are (1)relativistic acceleration and following gamma-ray emission in the closed current circuit in the magnetosphere, (2)wind of the electron-positron pair plasma, and (3)dipole radiation.

scholarly journals Electron-Positron Pair Winds from Central Luminous Accretion Disk with Radiation Drag

1998 ◽  
Vol 188 ◽  
pp. 402-403
Author(s):  
Y. Tajima ◽  
J. Fukue
Keyword(s):  
Black Hole ◽  
Accretion Disk ◽  
Accretion Disks ◽  
Radiation Fields ◽  
Pair Plasma ◽  
Electron Positron ◽  
Driving Source ◽  
Electron Positron Pair ◽  
Intense Radiation ◽  
Astrophysical Phenomena

The accretion disks are now supposed to be the main driving source of the active astrophysical phenomena. Even the electron-positron pair plasma will be created at the surface of the sufficiently luminous disk. While the effect of radiation drag which causes in the intense radiation fields around the accretion disk is examined recently. Then, we numerically consider the radiative accelerated pair-winds, which blow off from central luminous accretion disk surrounding a black hole, taking into account radiation drag of the order of v/c.

Unperturbed state and solitary structures in an electron-positron plasma having dust impurity and density inhomogeneity

2014 ◽  
Vol 80 (4) ◽  
pp. 629-641 ◽  
Author(s):  
Hitendra K. Malik ◽  
Rakhee Malik
Keyword(s):  
Density Gradient ◽  
Mkdv Equation ◽  
Charged Dust ◽  
Unperturbed State ◽  
Pair Plasma ◽  
Electron Positron ◽  
Electrons And Positrons ◽  
Solitary Structures ◽  
Dust Distribution ◽  
Positively Charged

An electron–positron pair plasma having dust impurity and density non-uniformity is studied for its unperturbed state and evolution of solitary structures under the effect of either positively charged or negatively charged dust grains. Zeroth-order equations are solved to examine the unperturbed state of the plasma via unperturbed potential φ0, drift velocities of the electrons and positrons (ve0 and vp0), and plasma (positron) density gradient np0η. It is observed that the dust distribution affects the gradient np0η significantly, which increases very sharply with a small increment in the dust density gradient nd0η. With relation to the solitary structures, a modified form of Korteweg–deVries equation (mKdV equation) is realized in the said plasma, which reveals that a tailing structure is associated with the soliton (sech2 structure). This tail is less prominent in the present pair plasma, contrary to the observation made in ordinary plasmas having only ions and electrons. The dust impurity is found to influence the solitary structure much significantly and its presence suppresses the rarefactive solitons, which are generally observed in multi-component species plasmas.

Erratum: Laser Field Absorption in Self-Generated Electron-Positron Pair Plasma [Phys. Rev. Lett.106, 035001 (2011)]

2011 ◽  
Vol 106 (10) ◽  
Author(s):  
E. N. Nerush ◽  
I. Yu. Kostyukov ◽  
A. M. Fedotov ◽  
N. B. Narozhny ◽  
N. V. Elkina ◽  
...  
Keyword(s):  
Laser Field ◽  
Plasma Phys ◽  
Pair Plasma ◽  
Electron Positron ◽  
Electron Positron Pair

Wave kinetic description of quantum pair plasmas

2008 ◽  
Vol 74 (1) ◽  
pp. 91-97 ◽  
Author(s):  
J. T. MENDONÇA ◽  
J. E. RIBEIRO ◽  
P. K. SHUKLA
Keyword(s):  
Dispersion Relation ◽  
Classical Limit ◽  
Landau Damping ◽  
Quantum Plasma ◽  
Kinetic Description ◽  
Electrostatic Waves ◽  
Pair Plasma ◽  
Electron Positron ◽  
Two Component ◽  
Electron Positron Pair

AbstractThe dispersion relation for a quantum pair plasma is derived, by using a wave kinetic description. A general form of the kinetic dispersion relation for electrostatic waves in a two-component quantum plasma is established. The particular case of an electron–positron pair plasma is considered in detail. Exact expressions for Landau damping are derived, and the quasi-classical limit is discussed.

Cyclotron effects on wave dispersion in pulsar plasmas

2000 ◽  
Vol 64 (4) ◽  
pp. 333-352 ◽  
Author(s):  
M. P. KENNETT ◽  
D. B. MELROSE ◽  
Q. LUO
Keyword(s):  
Low Frequency ◽  
Wave Dispersion ◽  
One Dimensional ◽  
Pair Plasma ◽  
Electron Positron ◽  
Light Line ◽  
The Mean ◽  
Plasma Dispersion ◽  
Electron Positron Pair ◽  
Relativistic Particles

Dispersion in an intrinsically relativistic, one-dimensional, electron–positron pair plasma (a pulsar plasma) is treated exactly, generalizing earlier results that applied in the low-frequency limit and that neglected the cyclotron resonance. The general theory involves two additional relativistic plasma dispersion functions, evaluated at the normal and anomalous Doppler resonances. These two functions are associated with the non-gyrotropic and gyrotropic parts of the response respectively. The functions are evaluated for bell-type and Jüttner distributions. Wave dispersion is discussed for a non-gyrotropic pulsar plasma with a highly relativistic Alfvén speed. Emphasis is placed on crossings of the light line, defined in terms of the parallel phase velocity. Subluminal waves exist only for sufficiently small angles of propagation, and are confined to frequencies below about the mean gyrofrequency of the relativistic particles.

Dense Electron-Positron Pair Plasma Expansion

2015 ◽  
Vol 70 (10) ◽  
pp. 875-880
Author(s):  
Mourad Djebli
Keyword(s):  
High Energy ◽  
Expansion Velocity ◽  
Exchange Correlation ◽  
Two Fluids ◽  
Pair Plasma ◽  
Electron Positron ◽  
Correlation Potential ◽  
Energy Laser ◽  
High Energy Laser ◽  
Electron Positron Pair

AbstractThe expansion of an electron-positron plasma is studied based on quantum hydrodynamical equations for two fluids. The quasi-neutral expansion, depicted through the quantum screening distance, is investigated numerically when the annealing processes is very slow. It was found that the pair plasma behaves as a single fluid with a front expansion velocity that depends on the density and degenerate parameters. Faster expansion results from the existence of exchange-correlation potential, which is enhanced in high-density plasma. The present investigation may be useful in understanding the expansion of a dense plasma produced by the interaction between high-energy laser and solid targets.

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