Focusing of lower hybrid waves by electromagnetic effects

Hsu, Powen; Kuehl, H. H.

doi:10.1088/0029-5515/22/12/014

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Limitations Of the Low-frequency Wave Model1

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2017

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“…1996; Schuck, Bonnell & Kintner 2003) and studies of excitation methods are interesting and relevant, but this problem is not considered in further detail here. Also lower hybrid waves have an electromagnetic component at long wavelengths (Hsu & Kuehl 1982). This component is not included in the present summary.…”

Section: Limitations Of the Low-frequency Wave Modelmentioning

confidence: 99%

Stability of electron wave spectra in weakly magnetized plasmas

Kono

Pécseli

2017

J. Plasma Phys.

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Analytical models for nonlinear electron plasma waves in weakly magnetized plasmas are developed for single as well as multi-mode conditions, with continuous wave spectra being a limiting case. The conditions for wave decay as well as modulational instabilities are analysed. Our results demonstrate that slow or nearly stationary plasma density variations can be found for weakly magnetized plasmas even for weakly nonlinear electron plasma waves without involving cavitation of large amplitude plasma waves. A reduction of the growth rates for decay as well as modulational instabilities are found when the spectral width of the wave spectrum is increased. Some of our results are relevant for the interpretation of the nonlinearly enhanced ion acoustic lines often observed in non-equilibrium ionospheres.

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Section: Limitations Of the Low-frequency Wave Modelmentioning

confidence: 99%