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Nongyrotropy as a source of instability and mode coupling
Author(s) -
Brinca A. L.,
Borda de Água L.,
Winske D.
Publication year - 1992
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/92gl01942
Subject(s) - physics , coupling (piping) , electromagnetic radiation , instability , dispersion (optics) , quantum electrodynamics , homogeneous , mode coupling , dispersion relation , plasma , wave propagation , computational physics , mode (computer interface) , classical mechanics , electromagnetic field , mechanics , statistical physics , quantum mechanics , computer science , operating system , mechanical engineering , engineering
Nongyrotropic particle populations can bring about linear mode coupling in homogeneous media among the three eigen‐modes of parallel propagation in gyrotropic magnetoplasmas. These interactions stimulate, in general, wave activity that does not occur in corresponding (random gyrophase) gyrotropic ambients. Solutions of the dispersion equation illustrate that simple introduction of gyrophase organization can (i) excite electrostatic (and electromagnetic) perturbations in media whose free energy sources are solely electromagnetic, and (ii) drive hybrid (both electrostatic and electromagnetic) wave growth in thoroughly stable Maxwellian plasmas.