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Authors: Falthammar C -G
Title: Effects of time-dependent electric fields on geomagnetically trapped radiation.
Abstract: Large-scale electric potential fields in the magnetosphere are generally invoked in theories of the aurora. It is shown in the present article that irregular fluctuations of such fields cause a random radial motion of trapped energetic particles by violating the third adiabatic invariant. When the first and second invariants are conserved, any radial motion of the particles is associated with a corresponding energy change. Some particles move outward and others inward; but, if there is a source in the outer magnetosphere and a sink farther in, there will be a net inward transport and an associated net energy gain. This mechanism supplements that of particle transport by magnetic disturbances, which has already been discussed in the literature. The transport and acceleration of energetic pa. . .
Date: 06/1965 Publisher: Journal of Geophysical Research Pages: 2503–2516 DOI: 10.1029/JZ070i011p02503 Available at:
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