On the electron distribution function in the F region and Airglow enhancements during HF modification experiments

Details On the electron distribution function in the F region and Airglow enhancements during HF modification experiments On the electron distribution function in the F region and Airglow enhancements during HF modification experiments

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27.2857m&link_type=abstract

Geophysical Research Letters, Volume 27, Issue 18, p. 2857-2860

Physics

18

Ionosphere: Active Experiments, Ionosphere: Plasma Temperature And Density, Ionosphere: Topside Ionosphere, Ionosphere: General Or Miscellaneous

Scientific paper

The variation with height and plasma frequency of the distribution function of ambient electrons (EDF) in the F region ionosphere during high-power, HF radio wave modification experiments is discussed. It is shown that the deviation of the EDF from a Maxwellian distribution (MD) in the high energy, >2 eV, range may be quite significant (decreasing by a factor of 2 to 5) depending on the background parameters. As a result, the cooling and excitation rates are reduced with respect to a MD calculation. This, for example, can improve agreement of the model based on excitation by heated thermal electrons with the observations of 630.0 nm airglow during HF modification experiments.

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