Energy flux and characteristic energy of an elemental auroral structure
Energy flux and characteristic energy of an elemental auroral structure
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基本极光结构的能量通量和特征能量
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
T. Turunen
中科院分区：
文献类型：
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作者：
B. Lanchester;J. Palmer;M. Rees;D. Lummerzheim;K. Kaila;T. Turunen
利用EISCAT雷达以0.2秒的时间分辨率获得的电子密度分布图以及电视图像和光度强度，研究了漂移通过仪器视场的薄（< 1公里）极光弧结构的特征。它表明，高的时间和空间分辨率是必不可少的电子通量的输入参数推导负责的基本极光结构。一个这样的结构需要一个400 mW m−2（erg cm−2 s−1）的向下能通量，由一个8 keV的单色电子通量携带，相当于50 µA m−2的电流密度。
Electron density profiles acquired with the EISCAT radar at 0.2 s time resolution, together with TV images and photometric intensities, were used to study the characteristics of thin (< 1 km) auroral arc structures that drifted through the field of view of the instruments. It is demonstrated that both high time and space resolution are essential for deriving the input parameters of the electron flux responsible for the elemental auroral structures. One such structure required a 400 mW m−2 (erg cm−2 s−1) downward energy flux carried by an 8 keV monochromatic electron flux equivalent to a current density of 50 µA m−2.