Evaluation of a space-observed electric field structure for the ability to destabilize inhomogeneous energy-density-driven waves

We examine the effectiveness of nonuniform, quasistatic, transverse electric fields that are often observed in the auroral region in destabilization of inhomogeneous energy-density-driven (IEDD) waves. Specifically, the IEDD dispersion relation of Ganguli et al. (1985a, b) is evaluated for an electr...

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Published inAnnales geophysicae (1988) Vol. 32; no. 1; pp. 1 - 6
Main Authors Golovchanskaya, I V, Kozelov, B V, Mingalev, I V, Melnik, M N, Lubchich, A A
Format Journal Article
LanguageEnglish
Published Katlenburg-Lindau Copernicus GmbH 10.01.2014
Copernicus Publications
Subjects
Altitude
Analysis
Broadband
Dispersions
Electric fields
Geophysics
Mathematical analysis
Plasma density
Plasma physics
Wavelengths
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Summary:We examine the effectiveness of nonuniform, quasistatic, transverse electric fields that are often observed in the auroral region in destabilization of inhomogeneous energy-density-driven (IEDD) waves. Specifically, the IEDD dispersion relation of Ganguli et al. (1985a, b) is evaluated for an electric field structure observed by the FAST satellite in the auroral ionosphere at 1000 km altitude. The background field-aligned current, plasma density and ion composition are derived from FAST observations. Other input parameters adopted in the calculations are varied in pertinent ranges. Unstable solutions are obtained that indicate a variety of frequencies and perpendicular wavelengths. These can manifest as a broadband spectrum of IEDD waves.
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ISSN:1432-0576
0992-7689
1432-0576
DOI:10.5194/angeo-32-1-2014