Physics
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsh21b0137r&link_type=abstract
American Geophysical Union, Fall Meeting 2003, abstract #SH21B-0137
Physics
7524 Magnetic Fields, 7859 Transport Processes, 7863 Turbulence
Scientific paper
The low-energy ion intensity profiles of impulsive solar energetic particle (SEP) events display both sharp (< 2.5 min) local gradients and larger scale (≈ 1-6 hour) dropouts, indicative of fast cross-field transport on the larger scales in spite of restricted short-scale transport. Rapid variations and modulations within the few-hour long channels of enhanced intensity are also observed. We show that the sharp gradients observed in the intensity profiles of impulsive particle events exist only because of the very strong supradiffusion of the field lines on the short and medium scales, due to the steep spectrum of magnetic turbulence measured on these scales. We also argue that these intermediate scales of magnetic turbulence may produce the substructures observed by Mazur et al. (2000) within the larger channels.
Kahler Stephen
Ragot B.
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