Paper Infomation
O-X Mode Conversion of Electroncyclotron Wave in Magnetizednon-uniform Plasma
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Author: Yiyu Xiong, Changjian Tang
Abstract: This study investigates the conversion mechanism and propagation characteristic of ordinary mode and extraordinary mode when electron cyclotron wave propagates in plasma. The result shows that the fundamental reason for the conversion of O mode and X mode is that the electric field polarization of the O mode and X mode of electromagnetic waves constantly changes with changes in plasma density, magnetic field, and the angle between the wave and magnetic field. This leads to the complete transformation of the O mode into the electric field polarization characteristics of the X mode near the cutoff layer, resulting in the so-called O-X mode conversion. In addition, the O-X mode conversion of electromagnetic waves in non-uniform plasmas is a gradual process, and electromagnetic waves can still propagate in X-mode after the cutoff layer. Therefore, the shielding effect of plasma on electromagnetic waves is not universal.
Keywords: Electromagnetic Wave, Mode Conversion, Plasma
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