Cascading of the upper hybrid/electron Bernstein wave in ionospheric heating experiments

Journal Article · Thu Sep 01 04:00:00 EDT 1994 · Physics of Plasmas; (United States)

DOI:https://doi.org/10.1063/1.870929· OSTI ID:6930072

Zhou, H L; Huang, J; Kuo, S P ^[1]

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1. Weber Research Institute, Polytechnic University, Route 110, Farmingdale, New York 11735 (United States)

Parametric decay of an upper hybrid/electron Bernstein pump wave into an upper hybrid/electron Bernstein sideband wave and a lower hybrid decay wave in the long-wavelength regime is studied. It is found that the process associated with the electron Bernstein pump wave has a lower threshold field than that of a similar decay process of the upper hybrid pump wave when the instability is excited in the region away from the double resonance layer. Near the double resonance layer, where the upper hybrid resonance frequency equals a harmonic of the electron cyclotron frequency, the upper hybrid wave and the electron Bernstein wave become linearly coupled, and the threshold field of the parametric decay process changes back to a similar functional dependence as that of the upper hybrid decay process. Thus, their threshold fields approach each other. When incorporated with appropriate nonlinear scattering processes, this instability process along with its cascading is proposed to be the generation mechanism for the downshifted maximum (DM), 2DM, 3DM, ... etc. features as well as the upshifted maximum (UM) feature in the stimulated electromagnetic emission spectrum observed in ionospheric heating experiments.

• OSTI ID: 6930072
• Journal Information: Physics of Plasmas; (United States), Journal Name: Physics of Plasmas; (United States) Vol. 1:9; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

662100 -- General Theory of Particles & Fields-- (1992-)
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700340* -- Plasma Waves
Oscillations
& Instabilities-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BERNSTEIN MODE
EARTH ATMOSPHERE
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
HEATING
INSTABILITY
IONOSPHERE
OSCILLATION MODES
PARAMETRIC INSTABILITIES
PLANETARY IONOSPHERES
PLASMA HEATING
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
RADIATIONS
RADIOWAVE RADIATION
RESONANCE
SCATTERING
SPECTRA