Summary of Particle Populations in the Magnetosphere

2009

In this paper, the characteristics of ion acoustic solitary waves are studied in plasmas containing warm ion fluid, non-thermally distributed electron and positron. We study the effects of non-thermal electrons and ion temperature on solitons by Pseudo-potential method and show that the parametric region where ion acoustic solitons can exist is modified. We also obtain linear dispersion relation by using the standard normal-modes analysis.

Section: Introductionmentioning

confidence: 94%

Ion acoustic solitary waves in plasma with nonthermal electron, positron and warm ion

2009

“…We know that when the ion velocity approaches the velocity of light, relativistic effects may significantly modify the behavior of the solitary waves. Relativistic plasmas occur in a variety of situations, such as, spaceplasma phenomena (Grabbe 1989), laser-plasma interaction (Arons 1979), plasma sheet boundary layer of earth's magnetosphere (Vette 1970) and describing the Van Allen radiation belts (Ikezi 1973). Das and Paul (1985) have investigated the weakly relativistic effects on ion-acoustic wave propagation in one dimension using the KdV equation for cold plasma and without electron inertia.…”

mentioning

confidence: 99%

Ion acoustic solitons of KdV and modified KdV equations in weakly relativistic plasma containing nonthermal electron, positron and warm ion

2010

In this paper, the ion-acoustic solitons in a weakly relativistic electron-positron-ion plasma have been investigated. Relativistic ions, Maxwell-Boltzmann distributed positrons and nonthermal electrons are considered in collisionless warm plasma. Using a reductive perturbation theory, a Korteweg-de Vries (KdV) equation is derived, and the relativistic effect on the solitons is studied. It is found that the amplitude of solitary waves of the KdV equation diverges at the critical values of plasma parameters. Finally, in this situation, the solitons of a modified KdV (mKdV) equation with finite amplitude is derived.

“…When ion velocity approaches the velocity of light, relativistic effect becomes dominant and in these cases amplitude, width and energy of wave are changed. Relativistic plasmas occur in a variety of situations, such as, space-plasmas (Grabbe 1989), laser-plasma interaction (Arons 1979), plasma sheet boundary layer of the earth's magnetosphere (Vette 1970). This situation is also used in order to describing the Van Allen radiation belts (Ikezi 1973).…”

Section: Introductionmentioning

confidence: 99%

Energy of ion acoustic solitons in electron-positron-ion plasmas with high relativistic ions

Javidan

2011