Excitation of VLF quasi-electrostatic oscillations in the ionospheric plasma

Details Excitation of VLF quasi-electrostatic oscillations in the ionospheric plasma Excitation of VLF quasi-electrostatic oscillations in the ionospheric plasma

Jan 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996angeo..14...27l&link_type=abstract

Annales Geophysicae, vol. 14, Issue 1, pp.27-32

Computer Science

Sound

2

Scientific paper

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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