Dynamics of Radiation Belt Particles

Author
Keywords
Abstract
This paper reviews basic concepts of particle dynamics underlying theoretical aspect of radiation belt modeling and data analysis. We outline the theory of adiabatic invariants of quasiperiodic Hamiltonian systems and derive the invariants of particle motion trapped in the radiation belts. We discuss how the nonlinearity of resonant interaction of particles with small-amplitude plasma waves, ubiquitous across the inner magnetosphere, can make particle motion stochastic. Long-term evolution of a stochastic system can be described by the Fokker-Plank (diffusion) equation. We derive the kinetic equation of particle diffusion in the invariant space and discuss its limitations and associated challenges which need to be addressed in forthcoming radiation belt models and data analysis.
Year of Publication
2013
Journal
Space Science Reviews
Volume
179
Number of Pages
545-578
Date Published
11/2013
ISSN Number
0038-6308
URL
http://link.springer.com/article/10.1007\%2Fs11214-012-9938-5
DOI
10.1007/s11214-012-9938-5