Journal•ISSN: 0022-3778
Journal of Plasma Physics
Cambridge University Press
About: Journal of Plasma Physics is an academic journal published by Cambridge University Press. The journal publishes majorly in the area(s): Plasma & Magnetic field. It has an ISSN identifier of 0022-3778. Over the lifetime, 4612 publications have been published receiving 61948 citations.
Topics: Plasma, Magnetic field, Electron, Wave propagation, Instability
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, the development of anisotropy in an initially isotropic spectrum is studied numerically for two-dimensional magnetohydrodynamic turbulence, due to the combined effects of an externally imposed dc magnetic field and viscous and resistive dissipation at high wave numbers.
Abstract: The development of anisotropy in an initially isotropic spectrum is studied numerically for two-dimensional magnetohydrodynamic turbulence. The anisotropy develops due to the combined effects of an externally imposed dc magnetic field and viscous and resistive dissipation at high wave numbers. The effect is most pronounced at high mechanical and magnetic Reynolds numbers. The anisotropy is greater at the higher wave numbers.
863 citations
TL;DR: In this article, an elementary but rigorous derivation for a variational principle for guiding center motion is given, and the application of variational principles in the derivation and solution of gyrokinetic equations is discussed.
Abstract: An elementary but rigorous derivation is given for a variational principle for guiding centre motion. The equations of motion resulting from the variational principle (the drift equations) possess exact conservation laws for phase volume, energy (for time-independent systems), and angular momentum (for azimuthally symmetric systems). The results of carrying the variational principle to higher order in the adiabatic parameter are displayed. The behaviour of guiding centre motion in azimuthally symmetric fields is discussed, and the role of angular momentum is clarified. The application of variational principles in the derivation and solution of gyrokinetic equations is discussed.
647 citations
TL;DR: In this paper, a weak turbulence formalism for incompressible magnetohy-drodynamics was derived, where three-wave interactions lead to a system of kinetic equations for the spectral densities of energy and helicity.
Abstract: We derive a weak turbulence formalism for incompressible magnetohy- drodynamics. Three-wave interactions lead to a system of kinetic equations for the spectral densities of energy and helicity. The kinetic equations conserve energy in all wavevector planes normal to the applied magnetic eld B0 ^k. Numerically and analytically, we nd energy spectra E k n ? , such that n+ +n = 4, where E are the spectra of the Elsvariables z = v b in the two-dimensional case (kk = 0). The constants of the spectra are computed exactly and found to depend on the amount of correlation between the velocity and the magnetic eld. Comparison with several numerical simulations and models is also made.
537 citations
TL;DR: In this paper, the stability of circularly polarized waves of finite amplitude propagating parallel to the magnetic field is studied. And the authors show that finite amplitude always promotes stability, while amplitude dependent stability conditions for long waves, previously obtained by the author, are confirmed.
Abstract: The stability of circularly polarized waves of finite amplitude propagating parallel to the magnetic field is studied. A set of equations for slowly varying waves of arbitrary amplitude is obtained. A discussion of the stability of the waces is based on this set of equations. Earlier results are confirmed; in addition we find that finite amplitude always promotes stability. An amplitude dependent stability condition for long waves, previously obtained by the author, is confirmed.
517 citations
TL;DR: In this article, the dependence of the asymptotic behavior of small ion-acoustic waves on the number of resonant electrons is investigated by assuming an electron equation of state corresponding to the observed flat-topped electron distribution functions.
Abstract: The dependence of the asymptotic behaviour of small ion-acoustic waves on the number of resonant electrons is investigated by assuming an electron equation of state corresponding to the observed flat-topped electron distribution functions. The result is a modified Korteweg-de Vries equation with a stronger nonlinearity.
475 citations