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  Sustaining Saturn's Electron Radiation Belts Through Episodic, Global‐Scale Relativistic Electron Flux Enhancements

Yuan, C., Roussos, E., Wei, Y., & Krupp, N. (2020). Sustaining Saturn's Electron Radiation Belts Through Episodic, Global‐Scale Relativistic Electron Flux Enhancements. Journal of Geophysical Research: Space Physics, 125(5): e2019JA027621. doi:10.1029/2019JA027621.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-67CC-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-67CD-0
Genre: Journal Article

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 Creators:
Yuan, C.‐J., Author
Roussos, Elias1, Author              
Wei, Y., Author
Krupp, Norbert1, Author              
Affiliations:
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              

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 MPIS_PROJECTS: CASSINI: LEMMS
 MPIS_PROJECTS: CASSINI: MIMI
 Abstract: The L shell distributions of MeV electrons in Saturn's radiation belt are investigated orbit by orbit for the 13‐year exploration of Cassini. It is found that in addition to the monotonic decrease profiles, there are orbits showing superimposed transient extensions. The extensions are found to stand out above the background population during 50% of belt crossings. We estimate that there is high probability (>72%) that transient extensions contribute more than 10% electron content in the radiation belt. The high occurrence frequency of one extension every 2–3 weeks, together with the relative content, demonstrate that the extensions constitute a regular and fundamental process populating and sustaining the electron belts of Saturn. The transients regularity excludes interplanetary coronal mass ejections as dominant trigger and implies corotation interaction regions and/or internal processes as candidates. Statistical results suggest that the communication of electrons between the middle magnetosphere and the radiation belts is largely through convective radial transport, which produces transient radiation belt extensions.

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Language(s): eng - English
 Dates: 2020
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1029/2019JA027621
 Degree: -

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Title: Journal of Geophysical Research: Space Physics
  Other : JGR-A
  Abbreviation : J. Geophys. Res. - A
Source Genre: Journal
 Creator(s):
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Publ. Info: Washington, D.C. : American Geophysical Union
Pages: - Volume / Issue: 125 (5) Sequence Number: e2019JA027621 Start / End Page: - Identifier: ISSN: 0148-0227
CoNE: https://pure.mpg.de/cone/journals/resource/991042728714264