Open AccessOn the stability of perpendicular electrostatic modes in stationary nongyrotropic plasmas
Author(s) -
Romeiras Filipe J.,
Brinca Armando L.
Publication year - 1999
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/1999ja900101
Subject(s) - physics , perpendicular , plasma , dispersion (optics) , stability (learning theory) , instability , electron , population , magnetic field , dispersion relation , plasma oscillation , computational physics , quantum electrodynamics , condensed matter physics , mechanics , quantum mechanics , mathematics , geometry , demography , machine learning , computer science , sociology
It is shown that the introduction of stationary gyrophase bunching in the electron population of a thoroughly stable magnetoplasma brings about strong growth of electrostatic waves propagating perpendicularly to the background magnetic field. We present the first derivation and analysis of the dispersion of these Bernstein‐like modes in media exhibiting stationary nongyrotropy, and we demonstrate the occurrence of solutions of the linear initial‐value problem with growth rates of the order of the associated real frequencies.