1. Acceleration of Ionospheric Out-Flowing Ions in the Substorm in Geo-magnetotail
- Author
-
Zhen-xing Liu Z X Liu, Jian-kui Shi J K Shi, T. L. Zhang, and Klaus Torkar
- Subjects
Physics ,Acceleration ,Substorm ,General Physics and Astronomy ,Ion distribution ,Atomic physics ,Ion acceleration ,Ionosphere ,Ion energy ,Ion - Abstract
Using dynamics equation, acceleration of out-flowing ion during dipolarization in a substorm in the magnetotail is simulated. The main results show that: (1) The ion distribution function that is initially exponentially decreasing with increasing speed is turned into a single peak distribution, and with time the peak moves towards higher speed. (2) The peak moves along V⊥ faster than that along V||, and the ion acceleration mainly occurs in the middle of the dipolarization. (3) The higher the initial energy, the faster the peak moves, and the more energy is obtained by the ions. The ion energy theoretically calculated is as high as about 102 keV, this is consistent with the observation.
- Published
- 1999
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