[Kallenrode 1992 b]
Propagation conditions of relativistic electrons in the inner heliosphere
M.-B. Kallenrode, G. Wibberenz and S. Hucke.
Propagation conditions of relativistic electrons in the inner heliosphere.
Astrophysical Journal, Part 1, 394, 351-356. 1992
Contents
The intensity and anisotropy time profiles of six relatively small
relativistic electron events observed within 0.65 AU by one of the Helios
spacecraft were fitted with the model of focused transport under the
assumption of a particle means free path lambda independent of the
radial distance.
For lambda of 0.5 MeV electrons it is found that the amount of
interplanetary scattering varies from one solar event to the other, with
local mean free paths lambda between 0.02 and 0.15 AU.
Comparison with previous results obtained close to 1 AU shows that there
is no marked variation in the average scattering conditions with radial
distance.
The amount of scattering for the small electron events presented in this study
is not markedly smaller than for large events.
This suggests that in this energy range the effects of additional turbulence
generated by the solar particles increasing the amount of interplanetary
scattering is not important.
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