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| Titel |
Excitation of VLF quasi-electrostatic oscillations in the ionospheric plasma |
| VerfasserIn |
B. Lundin, C. Krafft, G. Matthieussent, F. Jiricek, J. Shmilauer, P. Triska |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 14, no. 1 ; Nr. 14, no. 1, S.27-32 |
| Datensatznummer |
250012134
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| Publikation (Nr.) |
 copernicus.org/angeo-14-27-1996.pdf |
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| Zusammenfassung |
| A numerical solution of the dispersion
equation for electromagnetic waves in a hot magnetized collisionless plasma has
shown that, in a current-free ionospheric plasma, the distortion of the electron
distribution function reproducing the downward flow of a thermal electron
component and the compensating upward flow of the suprathermal electrons, which
are responsible for the resulting heat flux, can destabilize quasi-electrostatic
ion sound waves. The numerical analysis, performed with ion densities and
electron temperature taken from the data recorded by the Interkosmos-24 (IK-24,
Aktivny) satellite, is compared with a VLF spectrum registered at the same time
on board. This spectrum shows a wide frequency band emission below the local ion
plasma frequency. The direction of the electron heat flux inherent to the
assumed model of VLF emission generation is discussed |
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