Physics
Scientific paper
Aug 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icrc....4..396b&link_type=abstract
In its 19th Intern. Cosmic Ray Conf., Vol. 4 p 396-399 (SEE N85-34729 23-92)
Physics
Cosmic Rays, Diffusion Coefficient, Interplanetary Magnetic Fields, Pulse Modulation, Pulsed Radiation, Radiant Flux Density, Wave Propagation, Field Strength, Heliosphere, Particle Diffusion, Periodic Variations, Voyager Project
Scientific paper
Beyond several AU, interactions among shocks and streams give rise to merged interaction regions in which the magnetic field is turbulent. The integral intensity of . 75 MeV/Nuc cosmic rays at Voyager is generally observed to decrease when a merged interaction region moves past the spacecraft and to increase during the passage of a rarefaction region. When the separation between interaction regions is relatively large, the cosmic ray intensity tends to increase on a scale of a few months. This was the case at Voyager 1 from July 1, 1983 to May 1, 1984, when the spacecraft moved from 16.7 to 19.6 AU. Changes in cosmic ray intensity were related to the magnetic field strength in a simple way. It is estimated that the diffusion coefficient in merged interaction regions at this distance is similar to 0.6 x 10 to the 22nd power sq cm/s.
Burlaga Leonard Francis
Goldstein Michel L.
McDonald Frank B.
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