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Modulation of Magnetosonic Waves by Background Plasma Density in a Dipole Magnetic Field: 2-D PIC Simulation


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dc.creatorSun, Jicheng
dc.creatorLu, Quanming
dc.creatorWang, Xueyi
dc.creatorLiu, Xu
dc.creatorGao, Xinliang
dc.creatorYang, Huigen
dc.date.accessioned2022-11-08T21:10:19Z
dc.date.available2022-11-08T21:10:19Z
dc.date.created2021
dc.identifier10.1029/2021JA029729en_US
dc.identifier.urihttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2021JA029729en_US
dc.identifier.urihttps://aurora.auburn.edu/handle/11200/50456
dc.identifier.urihttp://dx.doi.org/10.35099/aurora-524
dc.description.abstractRecent satellite observations, combined with instability analyses, have shown that the background plasma density variation can modulate the magnetosonic (MS) waves by controlling the wave excitation. However, the detailed modulation process needs to be identified since the MS waves propagate nearly perpendicular to the background magnetic field. In this study, we investigate the MS wave modulation by background plasma density using a 2-D general curvilinear particle-in-cell simulation in the meridian plane of a dipole magnetic field. The simulation model consists of three plasma components: the background cold electrons and protons and ring distribution protons. We find that MS waves can be locally generated by ring distribution protons in the low plasma density region, while no MS wave is generated in the high density region. These MS waves are confined near the local source region since they are damped by the background cold plasma. The background protons gain more energy than background electrons, implying the plasmaspheric protons may dominate the modulation of MS waves. Moreover, we have also investigated the generation and propagation of MS waves in the plasmapause density structure. Our simulation results demonstrate that the background plasma density variation can modulate the MS waves and may play an important role in the spatial distribution of MS waves.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: Sun, J., Lu, Q., Wang, X., Liu, X., Gao, X., & Yang, H. (2021). Modulation of Magnetosonic Waves by Background Plasma Density in a Dipole Magnetic Field: 2‐D PIC Simulation. Journal of Geophysical Research: Space Physics, 126(11), e2021JA029729.en_US
dc.titleModulation of Magnetosonic Waves by Background Plasma Density in a Dipole Magnetic Field: 2-D PIC Simulationen_US
dc.typeTexten_US
dc.type.genreJournal Article, Academic Journalen_US
dc.citation.volume126en_US
dc.citation.issue11en_US
dc.description.statusPublisheden_US
dc.description.peerreviewYesen_US
dc.creator.orcid0000-0002-7211-0546en_US
dc.creator.orcid0000-0003-3041-2682en_US

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