Convection Electric Fields and the Diffusion of Trapped Magnetospheric Radiation
Author  
Keywords  
Abstract 
We explore here the possible importance of timedependent convection electric fields as an agent for diffusing trapped magnetospheric radiation inward toward the earth. By using a formalism (Birmingham, Northrop, and FĂ¤lthammar, 1967) based on first principles, and by adopting a simple model for the magnetosphere and its electric field, we succeed in deriving a onedimensional diffusion equation to describe statistically the lossfree motion of mirroring particles with arbitrary but conserved values of the first two adiabatic invariants M and J. Solution of this equation bears out the fact that reasonable electric field strengths, correlated in time for no longer than the azimuthal drift period of an average particle, move particles toward the earth at a rate at least an order of magnitude faster than electric fields whose source is a fluctuating current on the magnetopause.

Year of Publication 
1969

Journal 
Journal of Geophysical Research

Volume 
74

Number of Pages 
21692181

Date Published 
05/1969

ISSN Number 
01480227

URL 
http://onlinelibrary.wiley.com/doi/10.1029/JA074i009p02169/abstract

DOI 
10.1029/JA074i009p02169
