[P-EM11] Dynamics of the Inner Magnetospheric System

[PEM11-P10] The effect of quasi-steady scattering on the pulsating aurora

*Kazuteru Takahashi¹, Shinji Saito², Yoshizumi Miyoshi¹, Kohei Toyama¹, Kazushi Asamura³, Keisuke Hosokawa⁴ (1.Institute for Space-Earth Environmental Research, Nagoya University, 2.National Institute of Information and Communications Technology, 3.Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 4.Department of Communication Engineering and Informatics, University of Electro-Communications )

Keywords:Pulsating Aurora, GEMSIS-RBW, quasi-linear wave-particle interactions

We have studied non-linear wave-particle interactions caused by chorus waves and electrons using the test particle simulation, GEMSIS-RBW (Saito+, 2012). It is known that a quasi-steady precipitation causes the background emissions associated with the pulsating aurora. In order to model such quasi-steady precipitation, the Fokker-Planck equation has been used as a model in previous research. In order to include such quasi-steady precipitations in GEMSIS-RBW, we develop the new simulation code to implement quasi-linear wave-particle interactions by adopting stochastic differential equations that are equivalent to the Fokker-Planck equation as well as the pitch angle diffusion coefficients. In this presentation, we present the effect of quasi-steady precipitation on the electron scattering and resultant optical emissions.