# Fluctuations in electron-positron plasmas: Linear theory and implications for turbulence

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This article is devoted to a systematic development of the theory of distributed electron vortices in magnetized plasmas. Such vortices are nonlinear stationary propagating solutions of the model of electron magnetohydrodynamics. Two types of vortices are investigated: two-dimensional dipole and...

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A set of conservation equations is utilized to derive balance equations in the reconnection diffusion region of a symmetric pair plasma. The reconnection electric field is assumed to have the function to maintain the current density in the diffusion region and to impart thermal energy to the...

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It is shown that the short wavelength (kÂ²[sub âŠ¥]ÏÂ²[sub i] > 1, k[sub âŠ¥] is the characteristic wave vector, and Ï[sub i] is the ion Larmor radius) electromagnetic drift wave turbulence in typical conditions is unstable with respect to the excitation of large scale...

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In a turbulent magnetized plasma a relationship between velocity distribution of particles and its stochastic electric field is studied by solving the equation of motion both analytically and numerically. The distribution of velocity perpendicular to magnetic field direction is shown to be...

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High resolution numerical simulations of plasma turbulence driven by ion temperature gradients in the presence of magnetic field inhomogeneities have been performed with special attention to the behavior of the anomalous ion energy flux. The pressure gradient evolution is treated consistently...

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By using a two-dimensional (2D) relativistic fully electromagnetic particle-in-cell code, the interaction process of counterstreaming pair (electron-positron) plasmas is investigated. The counterstreaming plasmas become unstable against the collisionless electromagnetic counterstreaming...

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Collective behavior of ion Bernstein waves propagating perpendicular to an external magnetic field is studied with attention to the effect of multiple-ion species. In a thermal-equilibrium, multi-ion-species plasma, a great number of Bernstein waves are excited near the harmonics of many...

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The first quantitative comparison of linear ideal magnetohydrodynamic (MHD) theory with external magnetic measurements of the nonaxisymmetric plasma perturbation driven by external long-wavelength magnetic fields in high-temperature tokamak plasmas is presented. The comparison yields good...

- Simulation and laboratory validation of magnetic nozzle effects for the high power helicon thruster. Winglee, R.; Ziemba, T.; Giersch, L.; Prager, J.; Carscadden, J.; Roberson, B. R. // Physics of Plasmas;Jun2007, Vol. 14 Issue 6, p063501
The efficiency of a plasma thruster can be improved if the plasma stream can be highly focused, so that there is maximum conversion of thermal energy to the directed energy. Such focusing can be potentially achieved through the use of magnetic nozzles, but this introduces the potential problem...