Electron parallel-flow shear driven low-frequency electromagnetic modes in collisionless magnetoplasma

P. K. Shukla, B. Eliasson, M. Koepke

Research output: Contribution to journalArticle

15 Citations (Scopus)

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 languageEnglish
Article number052115
Number of pages6
JournalPhysics of Plasmas
Volume13
Issue number5
DOIs
Publication statusPublished - 22 May 2006

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parallel flow
electromagnetism
shear
low frequencies
hydrodynamic equations
Poisson equation
electromagnetic radiation
electrons
free energy
fluids
kinetics
magnetic fields
excitation
ions

Keywords

  • plasma
  • instability
  • velocity shear

Cite this

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Electron parallel-flow shear driven low-frequency electromagnetic modes in collisionless magnetoplasma. / Shukla, P. K.; Eliasson, B.; Koepke, M.

In: Physics of Plasmas, Vol. 13, No. 5, 052115, 22.05.2006.

Research output: Contribution to journalArticle

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AU - Eliasson, B.

AU - Koepke, M.

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