Generation of Electromagnetic Ion Cyclotron Wave by Hot Injection of Ion Beam for Ring Distribution with A.C. Electric Field in Jovian Magnetosphere
Abstract
This paper investigates the electromagnetic ion-cyclotron waves detected by the Ulysses spacecraft within the Jovian magnetosphere. Various types of high-frequency radio emissions resulting from resonant interactions have been identified in this region. The study focuses on the wave-particle interactions between electromagnetic ion-cyclotron waves and fully ionized magnetospheric plasma particles, considering the parallel propagation of these waves. This allows for a detailed evaluation of the dispersion relation with a ring distribution in the presence of a parallel alternating current (AC) electric field within a collisionless magnetosphere of Jupiter. Using a method of characteristics and a kinetic approach, we derive an expression for the relativistic growth rate. Additionally, we analyze injection events recorded by the Galileo spacecraft through its energetic particle detector (EPD) in the Jovian magnetosphere. Following the injection of a hot ion beam, we conduct a parametric analysis of various plasma parameters, such as temperature anisotropy, AC frequency, and relativistic factors, to examine their effects on the growth rate, which is illustrated through plotted graphs.
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