Computer Science
Scientific paper
Sep 1973
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973p%26ss...21.1497p&link_type=abstract
Planetary and Space Science, Volume 21, Issue 9, p. 1497-1509.
Computer Science
3
Scientific paper
The magnetopause, the boundary layer, or current sheath, which separates the magnetosphere from the solar wind, is the particular interaction considered in this paper. sThe collision free electron skin depth, ξe = c/ωpe, where c is the velocity of light and ωpe, is the plasma frequency, gives a classical measure of the penetration depth of a collisionless plasma by an electromagnetic field. This penetration depth is small compared with the dimensions of the magnetosphere and hence the boundary layer may be conveniently considered in one dimension. In General all one dimensional solutions lie within an order of magnitude of the value of ξe, the only exception being the important one, in which the electric field perpendicular to the current sheath plane is not present, either due to a particular trapped particle distribution or due to a short circuiting end effect. For this exception the thickness is increased by the factor (mii/me)1/2. The current sheath solutions discussed are equilibrium solutions but not necessarily stable equilibrium solutions. The extension of the models to three dimensions has a larger effect than might at first be expected. The effect may be intuitively understood as a consequence of flux conservation in the sheath. The one dimensional solutions then correspond to the current sheath profiles at the thinnest point of the three dimensional sheath.
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