Electron parallel-flow shear driven low-frequency electromagnetic modes in collisionless magnetoplasma
2006 (English)In: Physics of Plasmas, ISSN 1070-664X, E-ISSN 1089-7674, Vol. 13, no 5, 052115Article in journal (Refereed) PublishedText
The free energy associated with shear in the equilibrium parallel electron velocity is shown to be responsible for the excitation of low-frequency electromagnetic waves in collisionless magnetoplasma. New dispersion relations are derived by using the hydrodynamic equations for the electron fluid, the magnetic-field-aligned (parallel) drift of which varies in one of the perpendicular directions, and by using a kinetic ion model, together with Ampere's law and Poisson's equation. The dispersion relations are analyzed both analytically and numerically for a set of parameters representative of a laboratory experiment. New filamentary instabilities are predicted.
Place, publisher, year, edition, pages
Melville: American Institute of Physics (AIP), 2006. Vol. 13, no 5, 052115
ion-cyclotron waves, Kelvin-Helmholtz instability, field-aligned flow, velocity shear, magnetic field, acoustic waves, Q-machine, inhomogeneous plasma, auroral ionosphere, cesium plasma
Fusion, Plasma and Space Physics
IdentifiersURN: urn:nbn:se:umu:diva-119399DOI: 10.1063/1.2203605ISI: 000237943000016OAI: oai:DiVA.org:umu-119399DiVA: diva2:927153