地球磁层极尖区场向电子事件期间能量特性研究

Subjects: Geosciences >> Space Physics submitted time 2017-01-22

张子迎 史建魁 Klaus Torkar 王铮 程征伟

Abstract： Based on an extremely disturbed field-aligned electrons event observed with Cluster in the northern cusp region on September 30, 2001, the energy features of the field-aligned electrons in the event was analyzed and the role of the field-aligned electrons on the solar wind energy transfer into the magnetosphere and on the magnetosphere-ionosphere coupling. The results show that the velocities and densities of the electrons have strong disturbances during the event, and the velocity is main factor to enhance the electron flux. The energy spectrum in the 5~200eV and 500~1500eV show that the up-flowing electron flux is higher than down-flowing, which means the up-flowing electrons are from the ionosphere and play a active role in this event. The features of the energy show that the ionospheric electrons have been accelerated during the up-flow. However, the physical mechanism still needs to be further studied.

Peer Review Status:Awaiting Review

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