On the amplification of VLF hiss

Details On the amplification of VLF hiss On the amplification of VLF hiss

Mar 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979p%26ss...27..273y&link_type=abstract

Planetary and Space Science, vol. 27, Mar. 1979, p. 273-284.

Computer Science

1

Auroral Zones, Electron Precipitation, Hiss, Power Spectra, Very Low Frequencies, Atmospheric Models, Electron Beams, Vertical Distribution, Whistlers

Scientific paper

Some further consequences of Maggs' (1976) model of convective beam amplification of incoherent Cerenkov whistler radiation by the beam of precipitating auroral electrons are developed. If the altitude of the beam generation point is much higher than the observation point, the variation of beam velocity distribution with altitude cannot be neglected. The beam distribution function at any altitude is given by the solution of the Vlasov equations which satisfies the assumed distribution function at the beam generation point. The altitude dependence of power flux levels of VLF hiss predicted by convective beam amplification is considered, and it is suggested that nonlinear processes play an important role in determining levels and spectral shapes of VLF hiss power flux at high altitude. Attention is called to the importance of wave propagation outside the precipitation region for high power flux levels in the case of a weak beam and significant magnetic components of VLF hiss observed at low altitude.

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