Nonlinear mixing of beam-driven Bernstein modes and electromagnetic emissions at cyclotron harmonics in the ionosphere

Journal Article · Sat Sep 01 00:00:00 EDT 1990 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/JA095iA09p15269· OSTI ID:5452283

Laxmi, V N ^[1]; Tripathi, V K ^[2]

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1. Delhi Univ. (India)
2. Indian Inst. of Tech., New Delhi (India)

An energetic electron beam propagating along the field lines in the ionosphere excites electron Bernstein waves having small group velocity across the beam. Two Bernstein waves may nonlinearly couple with each other to produce electromagnetic waves at sum and difference frequencies. A kinetic theory of this process has been developed using a guiding center formalism. Employing the nonlinear coupling coefficient, an estimate of the electromagnetic emissions at cyclotron harmonics has been made. The emitted field amplitude scales directly as the product of pump wave field strengths and varies inversely with their frequency.

• OSTI ID: 5452283
• Journal Information: Journal of Geophysical Research; (United States), Vol. 95:A9; ISSN 0148-0227
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
IONOSPHERE
ELECTROMAGNETIC RADIATION
CHARGED PARTICLES
CYCLOTRON HARMONICS
ELECTRON BEAMS
GUIDING-CENTER APPROXIMATION
INTERACTIONS
KINETICS
MIXING
NONLINEAR PROBLEMS
PLASMA WAVES
WAVE PROPAGATION
BEAMS
EARTH ATMOSPHERE
HARMONICS
LEPTON BEAMS
OSCILLATIONS
PARTICLE BEAMS
PLANETARY IONOSPHERES
RADIATIONS
640201* - Atmospheric Physics- Auroral
Ionospheric
& Magetospheric Phenomena