Kiraly, P. and Mason, G. M. and Mewaldt, R. A. and Posner, A. and Rodriquez-Posner, J. (2005) Energy dependence of cumulative suprathermal and energetic particle fluence plots. In: Proceedings of the 29th International Cosmic Ray Conference. Vol.1. Tata Institute of Fundamental Research , Pune, India, pp. 71-74. https://resolver.caltech.edu/CaltechAUTHORS:20150406-144458133
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Abstract
Suprathermal and energetic particle flux variability can be statistically characterized in a number of ways. As time histories of flux integrals (cumulative fluences) are relevant both for practical reasons (radiation effects) and for a better understanding of the production and propagation processes, simple quantitative methods are of some interest. Previous studies (e.g. Mewaldt et al., 2001)[1] showed that the character of cumulative fluence plots changed substantially with energy. While at several MeV/nuc a few solar particle events predominate, at much lower energies similar contributions from many separate events of various origins were found. We shall now use a simple parametric method for comparisons, and mention some other possibilities. As in the Kolmogorov hypothesis test, the maximum vertical distance of normalized cumulative plots from the straight line valid for a constant flux will be shown to be useful. Small values of that parameter (called K here for Kolmogorov) indicate variation in many small steps, while large K-values correspond to the dominance of a small number of large events. Below a few MeV/nuc K-parameters will be shown to decrease with decreasing energies. Extrapolations to small energies will be mainly discussed.
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Additional Information: | Copyright TATA Institute of Fundamental Research | ||||||
Group: | Space Radiation Laboratory | ||||||
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Record Number: | CaltechAUTHORS:20150406-144458133 | ||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20150406-144458133 | ||||||
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Deposited By: | Deborah Miles | ||||||
Deposited On: | 22 Apr 2015 01:16 | ||||||
Last Modified: | 22 Nov 2019 09:58 |
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