Proton transport model in the ionosphere 1. Multistream approach of the transport equations

Details Proton transport model in the ionosphere 1. Multistream approach of the transport equations Proton transport model in the ionosphere 1. Multistream approach of the transport equations

Sep 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997jgr...10222261g&link_type=abstract

Journal of Geophysical Research, Volume 102, Issue A10, p. 22261-22272

Physics

Plasma Physics

32

Ionosphere: Auroral Ionosphere, Ionosphere: Particle Precipitation, Ionosphere: Solar Radiation And Cosmic Ray Effects, Space Plasma Physics: Charged Particle Motion And Acceleration

Scientific paper

The suprathermal particles, electrons and protons, coming from the magnetosphere and precipitating into the high-latitude atmosphere are an energy source of the Earth's ionosphere. They interact with ambient thermal gas through inelastic and elastic collisions. The physical quantities perturbed by these precipitations, such as the heating rate, the electron production rate, or the emission intensities, can be provided in solving the kinetic stationary Boltzmann equation. This equation yields particle fluxes as a function of altitude, energy, and pitch angle. While this equation has been solved through different ways for the electron transport and fully tested, the proton transport is more complicated. Because of charge-changing reactions, the latter is a set of two-coupled transport equations that must be solved: one for protons and the other for H atoms. We present here a new approach that solves the multistream proton/hydrogen transport equations encompassing the collision angular redistributions and the magnetic mirroring effect. In order to validate our model we discuss the energy conservation and we compare with another model under the same inputs and with rocket observations. The influence of the angular redistributions is discussed in a forthcoming paper.

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