气候变化领域集成服务门户(CCPortal): Energetic Proton Acceleration Associated With Io's Footprint Tail

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DOI	10.1029/2020GL090839
	Energetic Proton Acceleration Associated With Io's Footprint Tail
	Clark G.; Mauk B.H.; Kollmann P.; Szalay J.R.; Sulaiman A.H.; Gershman D.J.; Saur J.; Janser S.; Garcia-Sage K.; Greathouse T.; Paranicas C.; Allegrini F.; Bagenal F.; Bolton S.J.; Connerney J.E.P.; Ebert R.W.; Hospodarsky G.; Haggerty D.; Hue V.; Imai M.; Kotsiaros S.; McComas D.J.; Rymer A.; Westlake J.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:24
英文摘要	Observations of energetic charged particles associated with Io's footprint (IFP) tail, and likely within or very near the Main Alfvén Wing, during Juno's 12th perijove (PJ) crossing show evidence of intense proton acceleration by wave-particle heating. Measurements made by Juno/JEDI reveal proton characteristics that include pitch angle distributions concentrated along the upward loss cone, broad energy distributions that span ~50 keV to 1 MeV, highly structured temporal/spatial variations in the particle intensities, and energy fluxes as high as ~100 mW/m2. Simultaneous measurements of the plasma waves and magnetic field suggest the presence of ion cyclotron waves and transverse Alfvénic fluctuations. We interpret the proton observations as upgoing conics likely accelerated via resonant interactions with ion cyclotron waves. These observations represent the first measurements of ion conics associated with moon-magnetosphere interactions, suggesting energetic ion acceleration plays a more important role in the IFP tail region than previously considered. ©2020. American Geophysical Union. All Rights Reserved. This article has been contributed to by US Government employees and their work is in the public domain in the USA.
英文关键词	Cyclotron radiation; Cyclotrons; Electron beams; Ions; Magnetosphere; Plasma waves; Energetic charged particles; Energetic ion acceleration; Energy distributions; Ion cyclotron waves; Pitch angle distribution; Proton acceleration; Resonant interaction; Simultaneous measurement; Acceleration; energy flux; ion exchange; magnetic field; Moon; particle motion; particle size; planetary atmosphere; wave property
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169300
作者单位	Applied Physics Laboratory, Johns Hopkins University, Laurel, MD, United States; Department of Astrophysical Sciences, Princeton University, Princeton, NJ, United States; Department of Physics and Astronomy, University of Iowa, Iowa City, IA, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Institute of Geophysics and Meteorology, University of Cologne, Cologne, Germany; Southwest Research Institute, San Antonio, TX, United States; Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, TX, United States; Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO, United States; Space Research Corporation, Annapolis, MD, United States; Department of Electrical Engineering and Information Science, National Institute of Technology (KOSEN), Niihama College, Niihama, Japan; National Space Institute Measurement and Instrumentation Systems, DTU, Kongens Lyngby, Denmark
推荐引用方式 GB/T 7714	Clark G.,Mauk B.H.,Kollmann P.,et al. Energetic Proton Acceleration Associated With Io's Footprint Tail[J],2020,47(24).
APA	Clark G..,Mauk B.H..,Kollmann P..,Szalay J.R..,Sulaiman A.H..,...&Westlake J..(2020).Energetic Proton Acceleration Associated With Io's Footprint Tail.Geophysical Research Letters,47(24).
MLA	Clark G.,et al."Energetic Proton Acceleration Associated With Io's Footprint Tail".Geophysical Research Letters 47.24(2020).