Second?Harmonic Generation of EMIC Waves in the Inner Magnetosphere: Theoretical Analyses and Hybrid Simulations

Observations of non-linear second harmonic (SH) in various waves have recently been reported by several studies. However, the quantitative relation amplitudes between fundamental wave (FW) and SH has not derived verified yet. In this letter, equations for FW are simplified under cold plasma assumption, which is reasonable inner magnetosphere. The electromagnetic ion cyclotron theoretically through 1-D hybrid simulations. influences frequency normal angle on excitation mechanism obtained.