Kadomtsev-Petviashvili solitons propagation in a plasma system with superthermal and weakly relativistic effects

Hafeez-Ur-Rehman,; Shah, Asif; Mahmood, S.; Haque, Q.

doi:doi:10.1063/1.3662101

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Simulating gyrokinetic microinstabilities in stellarator geometry with GS2

The nonlinear gyrokinetic code GS2 has been extended to treat non-axisymmetric stellarator geometry. Electromagnetic perturbations and multiple trapped particle regions are allowed. Here, linear, collisionless, electrostatic simulations of the quasi-axisymmetric, three-field period national compact stellarator experiment (NCSX) design QAS3-C82 have been successfully benchmarked against the eigenvalue code FULL. Quantitatively, the linear stability calculations of GS2 and FULL agree to within ∼1...

Asymptotic equilibrium between Langmuir turbulence and suprathermal electrons

In both laboratory and natural environment such as the solar wind, suprathermal, or non-Maxwellian electron distributions are frequently observed. Electron velocity distribution functions containing non-Maxwellian, power-law energetic tail component are often modeled by the so-called kappa distribution, but their physical origin is not clearly understood. In a series of publications, the present author and his colleagues discussed the self-consistent formation of kappa-like distributions as a r...

Two dimensional (2D) solitons are studied in a plasma system comprising of relativistically streaming ions, kappa distributed electrons, and positrons. Kadomtsev-Petviashvili (KP) equation is derived through the reductive perturbation technique. Analytical solution of the KP equation has been studied numerically and graphically. It is noticed that kappa parameters of electrons and positrons as well as the ions relativistic streaming factor have an emphatic influence on the structural as well as propagation characteristics of two dimensional solitons in the considered plasma system. Our results may be helpful in the understanding of soliton propagation in astrophysical and laboratory plasmas, specifically the interaction of pulsar relativistic wind with supernova ejecta and the transfer of energy to plasma by intense electric field of laser beams producing highly energetic superthermal and relativistic particles [L. Arons, Astrophys. Space Sci. Lib. 357, 373 (2009); P. Blasi and E. Amato, Astrophys. Space Sci. Proc. 2011, 623; and A. Shah and R. Saeed, Plasma Phys. Controlled Fusion 53, 095006 (2011)].

Article Outline

INTRODUCTION
BASIC SET OF EQUATIONS
KADOMTSEV-PETVIASHVILI EQUATION
RESULTS AND DISCUSSION
SUMMARY

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KEYWORDS and PACS

Keywords

numerical analysis, perturbation theory, plasma solitons, plasma transport processes, relativistic plasmas

PACS

52.35.Sb

Solitons; BGK modes
52.25.Fi

Transport properties
52.27.Ny

Relativistic plasmas

ARTICLE DATA

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http://dx.doi.org/10.1063/1.3662101

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ISSN

1070-664X (print)

1089-7674 (online)

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$abstract.society.value is a Member of CrossRef

American Institute of Physics

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