Ionic diffusion in meteor trains

Details Ionic diffusion in meteor trains Ionic diffusion in meteor trains

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jatp...52..185j&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 52, March 1990, p. 185-191. Research supported by NSERC.

Physics

22

Earth Atmosphere, Ionic Diffusion, Meteor Trails, Diffusion Coefficient, Electron Density (Concentration), Electron Distribution, Ionic Mobility, Iron, Magnesium

Scientific paper

After reviewing the theory of ionic mobility and comparing the theoretical predictions with both laboratory and radio-meteor observations, results are presented from a simple numerical model which ignores chemical effects in which a train containing a mixture of equal numbers of Fe(+) and Mg(+) ions is allowed to diffuse. Approximate analytical solutions are obtained, which agree with the numerical calculations to within about 1 percent. The electron distribution is only slightly affected by the presence of multiple ions and remains Gaussian to a very good approximation. On the other hand, the coupling of the ionic motions exaggerates the differences in the diffusion rates of the constituent ions such that the lighter ions migrate to the outer regions of the train much faster than in the absence of coupling. It is suggested that this separation may have a significant effect on meteor ion chemistry.

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