Physics – Plasma Physics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29h.116a&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 8, pp. 116-1, CiteID 1275, DOI 10.1029/2001GL013941
Physics
Plasma Physics
26
Magnetospheric Physics: Energetic Particles, Trapped, Magnetospheric Physics: Magnetosphere-Inner, Magnetospheric Physics: Storms And Substorms, Space Plasma Physics: Wave/Particle Interactions
Scientific paper
Analytical expressions have been obtained for three different types of cyclotron-resonant interaction of a test particle with a monochromatic electromagnetic wave: diffusion, phase bunching, and phase trapping. All three lead to changes in particle energy and pitch angle. They are evaluated for VLF waves and electrons at L = 5.5, to try to account for observed electron acceleration following magnetic storms. The results are that diffusion may be too slow, while phase bunching leads to deceleration. A maximal estimate of phase trapping, considered in isolation, leads to the acceleration of at least some 0.1 MeV electrons to ~1 MeV in about 1 minute.
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