Thin current sheets in the deep geomagnetic tail
Thin current sheets in the deep geomagnetic tail
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地磁尾部深处的薄电流片
DOI：
10.1029/93gl01590
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发表时间：
1993
影响因子：
5.2
通讯作者：
N. Murphy
中科院分区：
文献类型：
--
作者：
T. Pulkkinen;D. Baker;C. Owen;J. Gosling;N. Murphy
本文检索了1983年1月至3月的ISEE-3磁场和等离子体电子数据，以研究深尾区的薄电流片。33个事件被选中，其中航天器在15分钟内从一个瓣到另一个瓣穿过电流片。电流片的平均厚度为2.45R_{E}，其中24个电流片厚度小于3.0R_{E}，有6个电流片厚度很薄（λ < 0.5R_{E}），电子数据表明，电流片厚度很薄与温度各向异性有关。平均而言，电子梯度电流是总电流的1.17%，而由电子温度各向异性引起的电流在由波瓣场幅度确定的总电流的8 - 45%之间变化。
The ISEE‐3 magnetic field and plasma electron data from Jan ‐ March 1983 have been searched to study thin current sheets in the deep tail region. 33 events were selected where the spacecraft crossed through the current sheet from lobe to lobe within 15 minutes. The average thickness of the observed current sheets was 2.45R_{E}, and in 24 cases the current sheet was thinner than 3.0R_{E}; 6 very thin current sheets (thickness λ < 0.5R_{E}) were found. The electron data show that the very thin current sheets are associated with considerable temperature anisotropy. On average, the electron gradient current was ∼ 17% of the total current, whereas the current arising from the electron temperature anisotropy varied between 8 – 45% of the total current determined from the lobe field magnitude.