A summary is given of recent results from the direct determination of the charge states of He, C, O, and Fe. These results are used in discussing compositional variations during individual solar particle events. It is shown that ratio changes by a factor of approximately 10 during the onset phase of solar particle events can be explained not only by rigidity-dependent interplanetary propagation but also by rigidity-dependent diffusive propagation in the corona. Increasing experimental evidence is seen that other processes, such as compositional variations at the source and discontinuities of the interplanetary magnetic field separating two different particle populations, may be important. No common explanation is seen for all the variations, and it is concluded that each must be investigated on its own.
Propagation of energetic particles in the solar wind
1982-01-01
Sonstige
Keine Angabe
Englisch
Propagation of energetic particles in the solar wind
Elsevier | 1983
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|Classification of solar energetic particles
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|Fractionation of Solar Energetic Particles and Solar Wind According to First Ionization Potential
British Library Conference Proceedings | 2002
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