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ENA Imaging of Planetary Ring Currents

2018; American Geophysical Union; Linguagem: Inglês

10.1002/9781119324522.ch6

2328-8779

P. C. Brandt, Syau‐Yun Hsieh, R. Demajistre, D. G. Mitchell,

Solar and Space Plasma Dynamics

Chapter 6 ENA Imaging of Planetary Ring Currents P. C. Brandt, P. C. Brandt Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USASearch for more papers by this authorS. Y. Hsieh, S. Y. Hsieh Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USASearch for more papers by this authorR. DeMajistre, R. DeMajistre Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USASearch for more papers by this authorD. G. Mitchell, D. G. Mitchell Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USASearch for more papers by this author P. C. Brandt, P. C. Brandt Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USASearch for more papers by this authorS. Y. Hsieh, S. Y. Hsieh Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USASearch for more papers by this authorR. DeMajistre, R. DeMajistre Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USASearch for more papers by this authorD. G. Mitchell, D. G. Mitchell Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USASearch for more papers by this author Book Editor(s):Andreas Keiling, Andreas KeilingSearch for more papers by this authorOctav Marghitu, Octav MarghituSearch for more papers by this authorMichael Wheatland, Michael WheatlandSearch for more papers by this author First published: 31 March 2018 https://doi.org/10.1002/9781119324522.ch6Citations: 7Book Series:Geophysical Monograph Series AboutPDFPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShareShare a linkShare onFacebookTwitterLinked InRedditWechat Summary Basic techniques of ENA cameras are presented followed by an overview of an inversion technique applied to ENA images obtained by the High Energy Neutral Atom (HENA) camera on board the Imager for Magnetopause-to-Aurora Global Exploration (IMAGE) mission. Observations from HENA are used to demonstrate the storm-time evolution and acceleration of the ring current ions. Plasma pressure retrieved from HENA images are used to illustrate the three-dimensional structure of the partial ring current (PRC) system. ENA observations of the Saturnian magnetosphere by the Ion and Neutral Camera (INCA) on board Cassini are used to contrast its force balance of the Saturnian magnetosphere with that of Earth. The dynamics of Saturn's magnetosphere are reviewed showing Earth-like phenomena such as large-scale injections not unlike those at Earth. A brief review is given of the only ENA observations of the Jovian magnetosphere by INCA during the Cassini flyby showing relatively stable ENA emissions indicating a presence of a Europa torus. A description of the future ENA observations of the Jovian magnetosphere on board the Jupiter Icy Moon Explorer (JUICE) by the European Space Agency (ESA) is given. The paper concludes by contrasting ENA imaging of the three planetary inner magnetospheres and summarizing future directions. Citing Literature Electric Currents in Geospace and Beyond RelatedInformation