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Title:
Effects of particle drifts on the solar modulation of galactic cosmic rays
Authors:
Jokipii, J. R.; Levy, E. H.
Affiliation:
AA(Arizona, University, Tucson, Ariz.), AB(Arizona, University, Tucson, Ariz.)
Publication:
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 213, Apr. 15, 1977, p. L85-L88. (ApJL Homepage)
Publication Date:
04/1977
Category:
Space Radiation
Origin:
STI
NASA/STI Keywords:
Cosmic Rays, Galactic Radiation, Interplanetary Magnetic Fields, Magnetic Field Configurations, Particle Motion, Solar Wind Velocity, Curvature, Drift Rate, Monte Carlo Method, Particle Diffusion, Radial Distribution
DOI:
10.1086/182415
Bibliographic Code:
1977ApJ...213L..85J

Abstract

Gradient and curvature drifts in an Archimedean-spiral magnetic field are shown to produce a significant effect on the modulation of galactic cosmic rays by the solar wind. The net modulation, heliocentric radial gradient, and average energy change of particles which reach the inner solar system are significantly reduced. The effects of drifts are due to the fact that cosmic rays for which the drift velocity is comparable to the wind velocity or larger, have more rapid access to the inner solar system than in the absence of drifts.

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Physics
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