Accession Number : AD0664092

Title :   TRANSPORT OF COSMIC RAYS IN THE INTERPLANETARY MEDIUM,

Corporate Author : BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH GEO-ASTRO PHYSICS LAB

Personal Author(s) : Roelof,E. C.

Report Date : OCT 1967

Pagination or Media Count : 15

Abstract : By quasilinearization of the Liouville equation for a charged particle in an electromagnetic field combined with an ensemble average over field configurations, a transport equation is derived for the ensemble average particle-distribution function. The resulting integro-differential equation is rewritten in terms of a simpler characteristic function which, when found, gives the complete solution in terms of the particle orbits in the ensemble mean fields. With the appropriate approximations, the equation reduces to the Fokker-Planck form applied recently by Jokipii to galactic cosmic-ray modulation, and by the author to energetic solar-flare particle propagation. It is argued that the equation, although complicated, offers several advantages as a starting point for transport theory over the simpler but less appropriate Fokker-Planck and Boltzmann equations. (Author)

Descriptors :   (*COSMIC RAYS, SPACE ENVIRONMENTS), TRAJECTORIES, ELECTROMAGNETIC FIELDS, CHARGED PARTICLES, SOLAR FLARES, TRANSPORT PROPERTIES, DISTRIBUTION FUNCTIONS, MATHEMATICAL ANALYSIS

Subject Categories : Astrophysics
      Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE