Two-dimensional electron-magnetohydrodynamic nonlinear structures

Jovanović, D.; Пегораро, Ф.

doi:10.1063/1.873886

Cited by 17 publications

(10 citation statements)

References 32 publications

(27 reference statements)

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“…where A 1 ¼ ð1 À 1=A 2 0 Þ 1=2 : We note that for A 0 > 1 the vortex profile (15) resembles the Kelvin-Stuart ''cat's eyes'' that are chains of vortices in an electron-ion plasma [15][16][17][18].…”

Section: Vortex Chainmentioning

confidence: 99%

Vortices in a Strongly Magnetized Electron–Positron–Ion Plasma

2003

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A theoretical investigation has been presented for the linear and nonlinear properties of obliquely propagating coupled low-frequency electrostatic drift and ion-acoustic (ED-IA) waves in a strongly magnetized nonuniform electron-positron-ion plasma in the presence of sheared ion flow. A result from our linear analysis is that the ED-IA waves can be unstable due to the ion sheared flow. In addition, it is shown that the nonlinear equations governing the dynamics of weakly interacting ED-IA waves admit vortex solutions of two different classes viz. a vortex chain and a double vortex.

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Section: Vortex Chainmentioning

confidence: 99%

Vortices in a Strongly Magnetized Electron–Positron–Ion Plasma

2003

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“…Recently, it has been shown by Jovanović and Pegoraro 21,22 and Jovanović and Shukla 23 that in a magnetized plasma, the electron holes may propagate perpendicularly to the magnetic field with velocities that are much smaller than the electron thermal speed. In those papers the electron holes were studied in the frequency range below the ion gyrofrequency.…”

Section: Introductionmentioning

confidence: 98%

Perpendicular electron trapping associated with nonlinear whistlers

2001

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Kinetic effects leading to the particle trapping are studied in a magnetized, inhomogeneous plasma configuration within the framework of the gyrokinetic theory in the frequency and spatial scale range that corresponds to the whistler waves. This treatment accounts for finite electron Larmor radius and polarization effects. A coherent nonlinear structure is found, which is identified as a magnetic vortex coupled with an electron hole. This novel electron hole is characterized by a strong magnetic field, and has a typical perpendicular size somewhat shorter than the electron collisionless skin depth. Electrons are trapped in the perpendicular direction by the combination of the electrostatic field, arising from the charge separation, and of the Lorentz force resulting from the propagation of the structure relative to the perturbed magnetic field lines. The trapping effects are restricted to the region at the center of the vortex. The size of this region is related to the electron Larmor-radius and to the Debye length.

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“…However, the magnetized character of the electrons and the fact that their flow speed could be relativistic produces certain distinct characteristic features to the properties of this well known fluid instability. These features have been identified by employing the electron magnetohydrodynamic (EMHD) fluid model [3][4][5] and its relativistic generalization for the depiction of the electron fluid flow. The role of magnetized behaviour of electron flow on KH instability has been investigated in considerable detail in several publications.…”

Section: Introductionmentioning

confidence: 99%

Perturbative analysis of sheared flow Kelvin–Helmholtz instability in a weakly relativistic magnetized electron fluid

2012

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In the interaction of intense lasers with matter/plasma, energetic electrons having relativistic energies get created. These energetic electrons can often have sheared flow profiles as they propagate through the plasma medium. In an earlier study [Phys. Plasmas 17, 022101 (2010)], it was shown that a relativistic sheared electron flow modifies the growth rate and threshold condition of the conventional Kelvin-Helmholtz instability. A perturbative analytic treatment for the case of weakly relativistic regime has been provided here. It provides good agreement with the numerical results obtained earlier. V C 2012 American Institute of Physics. [http://dx.

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Two-dimensional electron-magnetohydrodynamic nonlinear structures

Cited by 17 publications

References 32 publications

Vortices in a Strongly Magnetized Electron–Positron–Ion Plasma

Vortices in a Strongly Magnetized Electron–Positron–Ion Plasma

Perpendicular electron trapping associated with nonlinear whistlers

Perturbative analysis of sheared flow Kelvin–Helmholtz instability in a weakly relativistic magnetized electron fluid

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