Decay of the magnetic storm ring current by the charge-exchange mechanism |
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Authors: | GW Prölss |
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Institution: | Institut für Astrophysik und Extraterrestrische Forschung, The University of Bonn, 53 Bonn, W. Germany |
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Abstract: | Equatorial charge-exchange lifetimes of ring current protons are recalculated, and the decay of a collection of ring current protons trapped on an L-shell by the charge-exchange mechanism is determined using recent models of the hydrogen geocorona. Observational results pertaining to the decay of ring current energy are briefly discussed, as are a number of competing loss mechanisms. Since charge exchange is a simple physical process which is very efficient in removing ring current energy from L-shells near to the Earth (say, L < 4), it is suggested that it may well be the dominant loss mechanism in this region. |
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