Physics
Scientific paper
Nov 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jatp...38.1047c&link_type=abstract
(International Union of Radio Science and International Association of Geomagnetism and Aeronomy, Symposium on the Physics of th
Physics
Atmospheric Models, Earth Magnetosphere, Geoelectricity, High Temperature Plasmas, Adiabatic Conditions, Density Distribution, Equipotentials, Forbidden Bands, Liouville Theorem, Ring Currents
Scientific paper
The variation of the hot plasma bulk parameters with L-value in the outer radiation zone can be obtained by using conservation of the first two adiabatic invariants and Liouville's theorem to 'map' a distribution function from its source at large L (i.e., in the plasma sheet) into the outer zone. This simple calculation is valid, provided all velocity space is accessible to the source. However, for transport by convection electric fields, this is not true due to the formation of forbidden zones in the flow. As a result, only certain regions of velocity space are accessible to the source, and marked changes in the distribution function are expected across these velocity-space boundaries. Such effects are seen in ring-current data, and can be compared with theoretical profiles.
Ashour-Abdalla Maha
Cowley Stan W. H.
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