Ionospheric Kappa Electron Distributions

Details Ionospheric Kappa Electron Distributions Ionospheric Kappa Electron Distributions

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsm43c..05k&link_type=abstract

American Geophysical Union, Spring Meeting 2005, abstract #SM43C-05

Physics

2407 Auroral Ionosphere (2704), 2427 Ionosphere/Atmosphere Interactions (0335), 2467 Plasma Temperature And Density, 2704 Auroral Phenomena (2407)

Scientific paper

In the Earth's auroral zone at low to intermediate altitudes (2000-8000 km), plasma sheet electrons mix with colder ionospheric electrons producing a two-temperature plasma. The plasma sheet component has been shown by several researchers to have kappa distribution character rather than Manxwellian. The kappa distribution function is characterized by a Maxwellian-like core distribution with a hotter tail. We show theory and observations of the interpretation of Langmuir sweep data for the case of a kappa distribution background that suggest that the cold ionospheric plasma is also better characterized by a kappa distribution at these altitudes. We also examine the effects of these distributions on the acceleration of electrons by propagating Alfven waves.

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