Hydrodynamical equations for thermal electrons taking into account their scattering on ion-cyclotron waves in the outer plasmasphere of the earth

Details Hydrodynamical equations for thermal electrons taking into account their scattering on ion-cyclotron waves in the outer plasmasphere of the earth Hydrodynamical equations for thermal electrons taking into account their scattering on ion-cyclotron waves in the outer plasmasphere of the earth

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989p%26ss...37.1157k&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 37, Oct. 1989, p. 1157-1168.

Computer Science

19

Earth Ionosphere, Electron Scattering, Hydrodynamic Equations, Ion Cyclotron Radiation, Plasmasphere, Atmospheric Heating, Electron Energy, Heat Flux, Kinetic Equations, Wave Scattering

Scientific paper

Using Grad's method, a system of hydrodynamical equations for thermal electrons taking into account their interaction on Cherenkov resonance with ion-cyclotron waves generated in the outer plasmasphere of the earth, is obtained. Moments of a quasi-linear integral describing wave-induced scattering of electrons are calculated. These moments determine the variations of macroparameters of the electron component in relevant equations as a result of a collisionless damping of waves. For some measured wave spectra, a quantitative study is made of the heating source for thermal electrons and the resulting heat flux that transfers the energy being dissipated into the ionosphere. The calculations have shown that in order to model correctly the distribution of thermal electron parameters in the region in which the plasmasphere interacts with the ring current, and in the underlying ionosphere, it is necessary to have a system of hydrodynamical equations involving the collisional terms obtained in this paper.

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