Physics – Geophysics
Scientific paper
Nov 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.6427s&link_type=abstract
Journal of Geophysical Research, vol. 84, Nov. 1, 1979, p. 6427-6434.
Physics
Geophysics
20
Atmospheric Models, Auroral Arcs, Electrostatics, Shock Fronts, Distribution Functions, Geophysics, Graphs (Charts), Ion Density (Concentration), Poisson Equation, Velocity Distribution
Scientific paper
The two-dimensional current-driven shock theory of Swift (1976) is reformulated in a way that removes previous restrictions on the shock thickness in relation to an ion gyrodiameter and also makes it possible to include effects of finite gyrational energy of the ions. The theory is applied to a shock model consisting of cold streaming electrons of magnetospheric origin and streaming ions of ionospheric origin, and it is shown that shock widths will be slightly less than the gyrodiameter of an ion whose energy is equal to the maximum potential difference across the shock. It is also shown that ions in passing through the shock may gain gyrational energy on the order of 10% of the parallel and the E x B energy gain. The theory also requires that the electron beam flux be largest on field lines where the precipitating electron experiences the largest energy gain.
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