The evaluation of the interplanetary diffusion coefficient for energetic particles employing real magnetic field data

Details The evaluation of the interplanetary diffusion coefficient for energetic particles employing real magnetic field data The evaluation of the interplanetary diffusion coefficient for energetic particles employing real magnetic field data

Jul 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978ap%26ss..56..483m&link_type=abstract

Astrophysics and Space Science, vol. 56, no. 2, July 1978, p. 483-502. Research supported by the Science Research Council.

Astronomy and Astrophysics

Astrophysics

9

Diffusion Coefficient, Energetic Particles, Interplanetary Magnetic Fields, Interplanetary Medium, Solar Protons, Solar Wind, Graphs (Charts), Heos Satellites, Magnetic Field Configurations, Mathematical Models, Perturbation Theory, Pitch (Inclination), Propagation Modes

Scientific paper

The main result of the reported investigation is a much improved estimate of the parallel diffusion coefficient at 0.46 GV. Using numerical trajectory integrations in a model derived from the mean and three-dimensional field fluctuations shown by HEOS-2 data, a pitch angle diffusion coefficient distribution is found. It is demonstrated that local spacecraft magnetometer data, taken in general as a series of samples in a direction moving at approximately 45 deg to mean solar wind flux tubes, provides a field model capable of giving a reasonable prediction of the parallel and pitch angle diffusion experienced by solar protons, as established by experiment applying to a relatively wide region of interplanetary space.

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