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  Losses of Radiation Belt Energetic Particles by Encounters With Four of the Inner Moons of Jupiter

Long, M., Ni, B., Cao, X., Gu, X., Kollmann, P., Luo, Q., Zhou, R., Guo, Y., Guo, D., SHPRITS, Y. (2022): Losses of Radiation Belt Energetic Particles by Encounters With Four of the Inner Moons of Jupiter. - Journal of Geophysical Research: Planets, 127, 2, e2021JE007050.
https://doi.org/10.1029/2021JE007050

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Long, Minyi1, Autor
Ni, Binbin1, Autor
Cao, Xing1, Autor
Gu, Xudong1, Autor
Kollmann, Peter1, Autor
Luo, Qiong1, Autor
Zhou, Ruoxian1, Autor
Guo, Yingjie1, Autor
Guo, Deyu1, Autor
SHPRITS, YURI2, Autor              
Affiliations:
1External Organizations, ou_persistent22              
22.7 Space Physics and Space Weather, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_2239888              

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 Zusammenfassung: Based on an improved model of the moon absorption of Jovian radiation belt particles, we investigate quantitatively and comprehensively the absorption probabilities and particle lifetimes due to encounters with four of the inner moons of Jupiter (Amalthea, Thebe, Io, and Europa) inside L < 10. Our results demonstrate that the resultant average lifetimes of energetic protons and electrons vary dramatically between ∼0.1 days and well above 1,000 days, showing a strong dependence on the particle equatorial pitch angle, kinetic energy and moon orbit. The average lifetimes of energetic protons and electrons against moon absorption are shortest for Io (i.e., ∼0.1–10 days) and longest for Thebe (i.e., up to thousands of days), with the lifetimes in between for Europa and Amalthea. Due to the diploe tilt angle absorption effect, the average lifetimes of energetic protons and electrons vary markedly below and above urn:x-wiley:21699097:media:jgre21827:jgre21827-math-0001 = 67°. Overall, the average electron lifetimes exhibit weak pitch angle dependence, but the average proton lifetimes are strongly dependent on equatorial pitch angle. The average lifetimes of energetic protons decrease monotonically and substantially with the kinetic energy, but the average lifetimes of energetic electrons are roughly constant at energies <∼10 MeV, increase substantially around the Kepler velocities of the moons (∼10–50 MeV), and decrease quickly at even higher energies. Compared with the averaged electron lifetimes, the average proton lifetimes are longer at energies below a few MeV and shorter at energies above tens of MeV.

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 Datum: 2022-02-162022
 Publikationsstatus: Final veröffentlicht
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 Identifikatoren: DOI: 10.1029/2021JE007050
GFZPOF: p4 T1 Atmosphere
OATYPE: Green Open Access
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Titel: Journal of Geophysical Research: Planets
Genre der Quelle: Zeitschrift, SCI, Scopus
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Seiten: - Band / Heft: 127 (2) Artikelnummer: e2021JE007050 Start- / Endseite: - Identifikator: ISSN: 2169-9097
ISSN: 2169-9100
CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/jgr_planets
Publisher: American Geophysical Union (AGU)