| タイトル | Diodelike response of high-latitude plasma in magnetosphere-ionosphere coupling in the presence of field-aligned currents |
| 著者（英） | Palmadesso, P. J.; Mitchell, H. G., Jr.; Ganguli, Supriya B. |
| 著者所属（英） | NASA Headquarters; NASA Goddard Space Flight Center |
| 発行日 | 1992-08-01 |
| 言語 | eng |
| 内容記述 | The dynamic processes in the plasma along high-latitude field lines plays an important role in ionosphere-magnetosphere coupling process. A time-dependent, large-scale simulation of these dynamics parallel to the geomagnetic field lines from the ionosphere well into the magnetosphere is created. The plasma consists of hot e(-) and H(+) of magnetospheric origin and low-energy e(-), H(+), and O(+) of ionospheric origin. Including multiple electron species, a major improvement to the model, made it possible for the first time to simulate the upward current region properly and to dynamically simulate the diodelike response of the field-line plasma to the parallel currents coupling the ionosphere and magnetosphere. It is shown that return currents flow with small resistance, while upward currents produce kilovolt-sized potential drops along the field, as concluded from satellite observations. The kilovolt potential drops are due to the effect of the converging magnetic field on the high-energy magnetospheric electrons. |
| NASA分類 | GEOPHYSICS |
| レポートNO | 92A51180 |
| 権利 | Copyright |
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