| タイトル | Birkeland currents in an anisotropic, magnetostatic plasma |
| 著者（英） | Birmingham, Thomas J. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 1992-04-01 |
| 言語 | eng |
| 内容記述 | The paper derives an expression for the parallel current density for a plasma characterized by negligible bulk flow (magnetostatic velocity and a two-component (anisotropic) pressure tensor by expanding the equilibrium Vlasov equation for each species in the adiabatic parameter until such point as a nonvanishing moment j-parallel = integral d-cubed vv-parallel f is identified. The result is a nonlocal one: it relates j-parallel at one point s along a field line to j-parallel at another (reference) point s0 plus an integral function of the pressure and magnetic field between them. The equation derived by Vasyliunas (1970) is generalized and extended to a plasma in which the pressure tensor is comprised of two separate elements, P-perpendicular and P-parallel. This equation follows when P-perpendicular is set equal to P-parallel and s and s0 are taken to be at the ionosphere and the equator. These results are compared to others in the literature. |
| NASA分類 | PLASMA PHYSICS |
| レポートNO | 92A33551 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/328026 |
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