Mathematics
Scientific paper
Nov 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.348..343t&link_type=abstract
In ESA, Proceedings of the First SOHO Workshop: Coronal Streamers, Coronal Loops, and Coronal and Solar Wind Composition p 343-3
Mathematics
1
Diffusion, Particle Acceleration, Solar Cosmic Rays, Solar Flares, Energy Spectra, Mathematical Models, Neutron Counters, Solar Corona
Scientific paper
The large solar event of 29 Sep. 1989 at 11:33 UT was analyzed. Data was available from the GOES 6 and 7 satellites and from some 26 neutron monitors worldwide. Of the latter, the ground level enhancement measured by 7 stations was given an in depth analysis. Conclusions on the energy spectra and acceleration time are given, based on a double diffusive transport model containing a one dimensional interplanetary transport along the field line, and a two dimensional transport, tentatively called coronal. A special feature of this event is a clear double peak structure, with the ratio of the second peak amplitude to the first dropping from as much as 2 down to 1 when the rigidity increases from 100 to 500 MV, and being a few tens of percent in the GV rigidity region. Comparing different energies, the identical starting time of the fluxes forces the conclusion that the acceleration of the 100 MV particles has started several tens of minutes before the production of the first relativistic particles.
Schultz Göran C.
Torsti Jarmo
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