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Interplanetary Diffusion Coefficients for Cosmic Rays

Cummings, A. C. and Stone, E. C. and Vogt, R. E. (1973) Interplanetary Diffusion Coefficients for Cosmic Rays. In: Proceedings of the 13th International Cosmic Ray Conference. Vol.2. Colorado Associated University Press , Denver, CO, pp. 772-776.

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Information on the cosmic-ray diffusion coefficient, κ, derived from near-Earth observations of the solar modulation of galactic electron fluxes and from the near-Earth power spectra of the interplanetary magnetic field, has been used to study the heliocentric radial dependence of κ and to derive limits on the spatial extent of the solar modulation region. Representing κ as a separable function of radius r and rigidity, and assuming κ(r) ∝ r^n, we can place a limit on the power law exponent, n ≾ 1.2. The distance of the modulation boundary is a function of n, and, e.g., for n = 0, falls into the range of 6-25 AU.

Item Type:Book Section
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URLURL TypeDescription
Cummings, A. C.0000-0002-3840-7696
Stone, E. C.0000-0002-2010-5462
Additional Information:© 1973 University of Colorado. Provided by the NASA Astrophysics Data System. This work supported by the National Aeronautics and Space Administration, Grant NGR 05-002-160. One of us (Stone) was an Alfred P. Sloan research fellow, and another (Cummings) was a NASA Trainee during this work.
Group:Space Radiation Laboratory
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NASANGR 05-002-160
Alfred P. Sloan FoundationUNSPECIFIED
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Space Radiation Laboratory1973-10
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Deposited On:10 Apr 2014 21:47
Last Modified:20 Feb 2020 14:33

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