On the anticorrelation of the electric field and peak electron energy within an auroral arc

Computer Science – Sound

Scientific paper

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Auroral Arcs, Electric Fields, Electron Energy, Ionospheric Currents, Ionospheric Drift, Particle Precipitation, Aries Sounding Rocket, Environment Simulation, Space Plasmas

Scientific paper

The present investigation is concerned with an example of a strongly anticorrelated electric field and particle precipitation, taking into account an application of an extended version of the model of Evans et al. (1977) to the data. A striking feature of the data reported is the high degree of anticorrelation between electric field strength and peak precipitating electron energy. A simple model consisting of a constant current traversing a region in which the conductivities increase in proportion to ionospheric energy deposition provides a qualitative explanation of the observations. However, when the effects of neutral winds, ionization transport, Hall currents, and arc motion, and the nonlinearity of the relationship between peak precipitating electron energy and equilibrium are considered, the conclusions become less clear.

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