The polar ionosphere as a source of energetic magnetospheric plasma
The polar ionosphere as a source of energetic magnetospheric plasma
复制标题
极地电离层作为高能磁层等离子体的来源
DOI：
10.1029/gl009i009p00941
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发表时间：
1982
影响因子：
5.2
通讯作者：
J. Geiss
中科院分区：
文献类型：
--
作者：
E. Shelley;W.K. (Bill) Peterson;A. Ghielmetti;J. Geiss
数据上提出了一个额外的电离层源组成的离子向上流出的高纬度极冠的能量范围约为10 eV到100 eV以上。这些数据来自1981年8月发射的动力学探索者1号卫星上的高能离子成分谱仪。值得注意的是，给出的结果与Axford（1968）预测的极风类型的存在并不矛盾，因为能量小于约1 eV的离子将被通常为正的载体电位排除在仪器之外。结果表明，极地风的质量组成和能量被一些尚未确定的过程改变，或者被一个新的不相关的等离子体源补充。更重要的是，由于更高的能量，这里描述的高能极性帽离子进入等离子体片的距离比Cowley（1980）估计的更远，并且可能代表维持等离子体片的重要等离子体源。
Data are presented on an additional ionospheric source composed of ions flowing upward out of the high latitude polar cap with energies in the range of approximately 10 eV to more than about 100 eV. The data are from the energetic ion composition spectrometer (EICS) on board the Dynamics Explorer-1 satellite, launched in August 1981. It is noted that the results presented are not inconsistent with the existence of a polar wind of the type predicted by Axford (1968) since ions with energies less than about 1 eV would have been excluded from the instrument by the generally positive vehicle potential. The results suggest that the polar wind is either modified in mass composition and energy by some as yet unidentified process or is supplemented by a new unrelated source of plasma. What is more, owing to the higher energies, the energetic polar cap ions described here enter the plasma sheet at greater distances than Cowley (1980) estimated and probably represent a significant source of plasma for the maintenance of the plasma sheet.