Angular momenta creation in relativistic electron-positron plasma

Tatsuno, T.; Berezhiani, V. I.; Pekker, M.; Mahajan, S. M.

doi:10.1103/physreve.68.016409

Cited by 8 publications

(9 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The propagation of nonlinear waves in relativistic electronpositron plasmas has been a subject of interest for decades, due to their relevance in astrophysical environments, in connection with systems such as accretion disks [1], jet formation [2,3], early universe [4,5], and pulsar magnetospheres [6,7], and also in laboratory environments, where problems such as pair production by optical lasers [8,9] have been considered.…”

Section: Introductionmentioning

confidence: 99%

Thermal effects on the propagation of large-amplitude electromagnetic waves in magnetized relativistic electron-positron plasma

2012

View full text Add to dashboard Cite

The propagation of circularly polarized electromagnetic waves along a constant background magnetic field in an electron-positron plasma is calculated by means of both a fluid and a kinetic theory treatment. In the fluid theory, relativistic effects are included in the particle motion, the wave field, and in the thermal motion by means of a function f, which depends only on the plasma temperature. In this work we analyze the consistency of the fluid results with those obtained from a kinetic treatment, based on the relativistic Vlasov equation. The corresponding kinetic dispersion relation is numerically studied for various temperatures, and results are compared with the fluid treatment. Analytic expressions for the Alfvén velocity are obtained for the fluid and kinetic models, and it is shown that, in the kinetic treatment, the Alfvén branch is suppressed for large temperatures.

show abstract

Section: Introductionmentioning

confidence: 99%

Thermal effects on the propagation of large-amplitude electromagnetic waves in magnetized relativistic electron-positron plasma

2012

View full text Add to dashboard Cite

show abstract

“…Regarding the second subject, we are currently performing numerical 1-D particle in cell simulations, a work that is still in progress, although preliminary results are consistent with the analytical ones. White and Lightman, 1989), models of the early universe (Gibbons et al, 1985;Tajima and Taniuti, 1990;Tatsuno et al, 2003;Lesch and Pohl, 1992), supernova remnants and active galactic nuclei (Hardy and Thoma, 2000;Reynolds et al, 1996), pulsar magnetospheres (Curtis, 1991;Istomin and Sobyanin, 2007;Manchester and Taylor, 1977;Sturrock, 1971), magnetars (neutron stars with magnetic fields up to ∼ 10 14 G) (Beskin et al, 1993), hypothetical quark stars (Usov, 1998), and gamma-ray bursts (Piran, 1999(Piran, , 2004. Regarding laboratory plasmas, they have been considered in the study of ultra-intense lasers (Blaschke et al, 2006), and in laboratory and tokamak plasmas (Zank and Greaves, 1995).…”

mentioning

confidence: 99%

Large-amplitude electromagnetic waves in magnetized relativistic plasmas with temperature

Muñoz

Asenjo

Domínguez

et al. 2014

Nonlin. Processes Geophys.

View full text Add to dashboard Cite

Abstract. Propagation of large-amplitude waves in plasmas is subject to several sources of nonlinearity due to relativistic effects, either when particle quiver velocities in the wave field are large, or when thermal velocities are large due to relativistic temperatures. Wave propagation in these conditions has been studied for decades, due to its interest in several contexts such as pulsar emission models, laser-plasma interaction, and extragalactic jets.For large-amplitude circularly polarized waves propagating along a constant magnetic field, an exact solution of the fluid equations can be found for relativistic temperatures. Relativistic thermal effects produce: (a) a decrease in the effective plasma frequency (thus, waves in the electromagnetic branch can propagate for lower frequencies than in the cold case); and (b) a decrease in the upper frequency cutoff for the Alfvén branch (thus, Alfvén waves are confined to a frequency range that is narrower than in the cold case). It is also found that the Alfvén speed decreases with temperature, being zero for infinite temperature.We have also studied the same system, but based on the relativistic Vlasov equation, to include thermal effects along the direction of propagation. It turns out that kinetic and fluid results are qualitatively consistent, with several quantitative differences. Regarding the electromagnetic branch, the effective plasma frequency is always larger in the kinetic model. Thus, kinetic effects reduce the transparency of the plasma. As to the Alfvén branch, there is a critical, nonzero value of the temperature at which the Alfvén speed is zero. For temperatures above this critical value, the Alfvén branch is suppressed; however, if the background magnetic field increases, then Alfvén waves can propagate for larger temperatures.There are at least two ways in which the above results can be improved. First, nonlinear decays of the electromagnetic wave have been neglected; second, the kinetic treatment considers thermal effects only along the direction of propagation. We have approached the first subject by studying the parametric decays of the exact wave solution found in the context of fluid theory. The dispersion relation of the decays has been solved, showing several resonant and nonresonant instabilities whose dependence on the wave amplitude and plasma temperature has been studied systematically. Regarding the second subject, we are currently performing numerical 1-D particle in cell simulations, a work that is still in progress, although preliminary results are consistent with the analytical ones.

show abstract

“…In the past few decades, the propagation of intense EM waves in e-p plasmas has been theoretically studied by many authors [16][17][18][19][20][21][22][23][24][25][26]. However, most of these investigations are based on fluid model.…”

Section: Introductionmentioning

confidence: 99%

“…At high temperatures there is spontaneous generation of EM radiation [14,16], and large-amplitude localized EM radiation has been found to exist in the pulsar environment. The knowledge of the EM wave dynamics in e-p plasmas is essential for understanding the radiation properties of astrophysical objects, even the media exposed to the field of super-strong laser radiation [17].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Behavior of Electromagnetic Waves in Ultra‐Relativistic Electron‐Positron Plasmas

Liu

2010

Contrib. Plasma Phys.

View full text Add to dashboard Cite

A set of nonlinear equations which can self-consistently describe the behavior of high frequency Electromagnetic (EM) waves in un-magnetized, ultra-relativistic electron-positron (e-p) plasmas is obtained on the basis of Vlasov-Maxwell equations. Nonlinear wave-wave, wave-particle interactions lead to the coupling of high frequency EM waves with low frequency density perturbations which result from EM waves radiation pressure. The same as that in conventional electron-ion (e-i) plasmas, strong EM waves in e-p plasmas will give rise to density depletion in which itself are trapped. But on the contrary to that in e-i plasmas, there no longer exists electrostatic acoustic-like wave in e-p plasmas due to the absence of mass difference. For linear polarized EM waves, a stationary EM soliton with a spiky structure will be formed. The possible relation of the localized field to pulsar radio pulse is discussed.

show abstract

Angular momenta creation in relativistic electron-positron plasma

Cited by 8 publications

References 31 publications

Thermal effects on the propagation of large-amplitude electromagnetic waves in magnetized relativistic electron-positron plasma

Thermal effects on the propagation of large-amplitude electromagnetic waves in magnetized relativistic electron-positron plasma

Large-amplitude electromagnetic waves in magnetized relativistic plasmas with temperature

Nonlinear Behavior of Electromagnetic Waves in Ultra‐Relativistic Electron‐Positron Plasmas

Contact Info

Product

Resources

About