| タイトル | Numerical models of solar modulation of galactic cosmic rays, including drifts |
| 著者（英） | Jokipii, J. R.; Kopriva, D. A. |
| 著者所属（英） | Arizona Univ. |
| 発行日 | 1980-01-01 |
| 言語 | eng |
| 内容記述 | Numerical solutions are presented of the steady-state modulation of galactic cosmic rays for a realistic two-dimensional model which includes drifts. Calculations of energy spectra and the spatial density variation of protons are shown for a model that incorporates the solar-minimum magnetic field and nominal interplanetary propagation parameters. The calculated values are relatively insensitive to the assumed size of the modulating region and to the magnitude of the particle diffusion coefficient. The solutions show a broad interior 'plateau' in which radial gradients are small. A simple model that neglects diffusion but includes drifts and adiabatic cooling accounts for these results. It is concluded that in this model and the range of parameters, diffusion plays a role secondary to that of drifts and adiabatic cooling. |
| NASA分類 | SPACE RADIATION |
| レポートNO | 81A12427 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/418983 |
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