The model dependence of differential power spectra of incoherent Cerenkov radiation

Details The model dependence of differential power spectra of incoherent Cerenkov radiation The model dependence of differential power spectra of incoherent Cerenkov radiation

Jan 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81..287n&link_type=abstract

Journal of Geophysical Research, vol. 81, Jan. 1, 1976, p. 287-290.

Physics

Cerenkov Radiation, Electron Precipitation, Electrostatic Waves, Hiss, Power Spectra, Atmospheric Models, Electron Energy, Emission Spectra, Plasma Frequencies, Very Low Frequencies

Scientific paper

On the basis of the consideration that incoherent Cerenkov radiation from precipitating electrons with energy of less than 1 keV is nearly electrostatic, the emission process for high-latitude VLF hiss is reexamined semiquantitatively. It is pointed out that a peak intensity of the spectral power for the guided Cerenkov emission occurs near the local electron plasma frequency at a point along the field line where the plasma frequency coincides with the local electron cyclotron frequency. This result gives us a reasonable explanation for the main difference between the two previous studies of (1) Jorgensen and (2) Lim and Laaspere.

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