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The fokker-planck coefficient for pitch-angle scattering of cosmic rays. [considering magnetic field fluctuations
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Sandri, G. Goldstein, M. L. Fisk, L. A. Klimas, A. J. |
| Copyright Year | 1973 |
| Description | For the case of homogeneous, isotropic magnetic field fluctuations, it is shown that most theories which are based on the quasi-linear and adiabatic approximation yield the same integral for the Fokker-Planck coefficient for the pitch angle scattering of cosmic rays. For example, despite apparent differences, the theories due to Jokipii and to Klimas and Sandri yield the same integral. It is also shown, however, that this integral in most cases has been evaluated incorrectly in the past. For large pitch angles these errors become significant, and for pitch angles of 90 deg the actual Fokker-Planck coefficient contains a delta function. The implications for these corrections relating cosmic ray diffusion coefficients to observed properties of the interplanetary magnetic field are discussed. |
| File Size | 730555 |
| Page Count | 37 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19740005421 |
| Archival Resource Key | ark:/13960/t3809vp8p |
| Language | English |
| Publisher Date | 1973-10-01 |
| Access Restriction | Open |
| Subject Keyword | Space Radiation Magnetic Flux Error Analysis Scattering Coefficients Fokker-planck Equation Diffusion Coefficient Cosmic Rays Pitch Inclination Interplanetary Magnetic Fields Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
