第3回極域科学シンポジウム/第36回極域宙空圏シンポジウム 11月27日（火） 国立極地研究所 2階大会議

kawa Yoshi

Liu Huixin

Shi Run

National Institute of Polar Research Repository

   1D simulation of Electron acceleration by Inertial Alfven wave pulse  Run Shi1, 2 Huixin Liu1 Yoshikawa1 1 Department of Earth and Planetary Sciences, Kyushu University, Fukuoka, Japan. 2 SOA Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai, China  In order to investigate the influence of sharp increase of Alfven speed in the top ionosphere on the auroral electron acceleration, a one-dimensional model is developed to simulate the electron acceleration by inertial Alfven waves. The mirror force is included. The auroral electrons are treated as two components: cold that is described by the fluid equation and hot described by the Vlasov equation, both carrying field-aligned currents. Intense variation of Alfven speed has been introduced by the inclusion of cold electrons. It is shown that when this Alfven speed structure is considered, the efficiency of wave-particle interaction is enhanced. It is also demonstrated that the field-aligned current carried by these hot electrons which exceed the wave front is balanced by reverse current carried by cold electrons. During this process, much of wave energy has been transported into electron kinetic energy before the waves reach the ionosphere.  Key words: mirror force; electron acceleration; inertial Alfven waves 

1D simulation of Electron acceleration by Inertial Alfven wave pulse

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1D simulation of Electron acceleration by Inertial Alfven wave pulse

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National Institute of Polar Research Repository