Diurnal variation of cosmic ray intensity 2. Calculation of the diffusion coefficients

Journal Article · Wed Nov 01 04:00:00 EST 1978 · J. Geophys. Res.; (United States)

DOI:https://doi.org/10.1029/JA083iA11p05151· OSTI ID:6502497

Sari, J W

Diffusion coefficients for cosmic ray propagation in the interplanetary magnetic field are obtained for particles of energies typically observed by ground-based neutron monitors. The estimates are made in the context of present quasi-linear and nonlinear theories. Recent observations of the interplanetary magnetic field fluctuations are employed. It is found that the diffusion coefficients derived from the theoretical models generally differ by less than 50%. These differences are less than experimental uncertainties arising from variations in the relevant solar wind observables, where the observables are obtained over scale sizes of the order of a few cosmic ray mean free paths.

• Research Organization: Calspan Corporation, Buffalo, New York 14221
• OSTI ID: 6502497
• Journal Information: J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 83:A11; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

640101* -- Astrophysics & Cosmology-- Cosmic Radiation
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANISOTROPY
COSMIC RADIATION
COSMIC RAY PROPAGATION
DAILY VARIATIONS
DIFFUSION
FLUCTUATIONS
INTERPLANETARY MAGNETIC FIELDS
IONIZING RADIATIONS
MAGNETIC FIELDS
MATHEMATICS
RADIATIONS
STATISTICS
VARIATIONS