Abstract
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 Ampère’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.
Original language | English |
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Article number | 052115 |
Number of pages | 6 |
Journal | Physics of Plasmas |
Volume | 13 |
Issue number | 5 |
DOIs | |
Publication status | Published - 22 May 2006 |
Keywords
- plasma
- instability
- velocity shear