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Propagation of Electromagnetic Ion Cyclotron Waves in a Dipole Magnetic Field: A 2-D Hybrid Simulation


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dc.creatorKang, Ning
dc.creatorLu, Quanming
dc.creatorGao, Xinliang
dc.creatorWang, Xueyi
dc.creatorChen, Huayue
dc.creatorWang, Shui
dc.date.accessioned2022-11-08T21:04:14Z
dc.date.available2022-11-08T21:04:14Z
dc.date.created2021
dc.identifier10.1029/2021JA029720en_US
dc.identifier.urihttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2021JA029720en_US
dc.identifier.urihttps://aurora.auburn.edu/handle/11200/50454
dc.identifier.urihttp://dx.doi.org/10.35099/aurora-522
dc.description.abstractElectromagnetic ion cyclotron (EMIC) waves are one commonly observed plasma waves in the Earth's inner magnetosphere and play a crucial role in particle dynamics in the radiation belt and ring current. EMIC waves are excited by a proton temperature anisotropy and generally have a left-handed polarization, however satellite observations have usually reported the existence of linearly polarized EMIC waves in the inner magnetosphere. In this paper, we employ a two-dimensional (2D) hybrid code in a dipole field (gcPIC-hybrid) to simulate the propagation of EMIC waves from the equatorial source region. We track one single EMIC wave packet and analyze how its properties evolve along its trajectory. In diagnosing the wave normal angle (WNA) of the packet, we propose a novel method called Wave Front Shape Identification (WFSI). The ellipticity can also been calculated after we know the WNA. By comparing the ellipticity calculated from the linear theory and the ellipticity diagnosed from the simulation, we conclude that in a proton-electron plasma, EMIC waves would turn from a left-handed polarization to a linear polarization solely due to the propagation effect when the waves propagate toward higher latitudes and become oblique. We also find that the peak frequency of the wave packet (the wave mode with the maximum amplitude) decreases when propagating toward higher latitudes, which is due to different growth and damping behavior of different modes.en_US
dc.formatPDFen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.ispartofJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICSen_US
dc.relation.ispartofseries2169-9380en_US
dc.rights©American Geophysical Union 2021. This is this the version of record co-published by the American Geophysical Union and John Wiley & Sons, Inc. It is made available under the CC-BY-NC-ND 4.0 license. Item should be cited as: Kang, N., Lu, Q., Gao, X., Wang, X., Chen, H., & Wang, S. (2021). Propagation of Electromagnetic Ion Cyclotron Waves in a Dipole Magnetic Field: A 2‐D Hybrid Simulation. Journal of Geophysical Research: Space Physics, 126(12), e2021JA029720.en_US
dc.titlePropagation of Electromagnetic Ion Cyclotron Waves in a Dipole Magnetic Field: A 2-D Hybrid Simulationen_US
dc.typeTexten_US
dc.type.genreJournal Article, Academic Journalen_US
dc.citation.volume126en_US
dc.citation.issue12en_US
dc.description.statusPublisheden_US
dc.description.peerreviewYesen_US
dc.creator.orcid0000-0002-7619-701Xen_US
dc.creator.orcid0000-0003-3041-2682en_US
dc.creator.orcid0000-0002-7317-8665en_US

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