DOI: 10.1029/2018JA025262
Scopus记录号: 2-s2.0-85050257731
论文题名: Internal Versus External Sources of Plasma at Saturn: Overview From Magnetospheric Imaging Investigation/Charge-Energy-Mass Spectrometer Data
作者: Allen R.C. ; Mitchell D.G. ; Paranicas C.P. ; Hamilton D.C. ; Clark G. ; Rymer A.M. ; Vines S.K. ; Roelof E.C. ; Krimigis S.M. ; Vandegriff J.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 6 起始页码: 4712
结束页码: 4727
语种: 英语
英文关键词: Cassini
; energetic particles
; Kelvin Helmholtz
; MIMI/CHEMS
; reconnection
; Saturn
英文摘要: Plasma composition observations provide a useful mechanism for investigating plasma sources and subsequent evolution within planetary magnetospheres. While He++ is the second most abundant ion species in the solar wind, there are no known sources of He++ ions within the magnetosphere of Saturn, allowing He++ to serve as a tracer of solar wind ions within the Kronian magnetosphere. Meanwhile, water group ions (W+, consisting of O+, OH+, H2O+, and H3O+) and H2 +, known to originate within the magnetosphere of Saturn, serve as a tracer of internally ionized plasma. In this paper, we investigate the relative abundances and properties of energetic (32–220 keV) ion species originating from sources within the magnetosphere and from the solar wind. Solar wind-originating ions are observed to have significant relative abundance (up to ~0.05) in the midnight, dawn, and noon local time quadrants at high radial distances (~40, ~45, and ~20 RS, respectively). Several possible entry processes, such as reconnection and Kelvin-Helmholtz instabilities, are outlined in this paper as well as a discussion of subsequent transport. ©2018. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113815
Appears in Collections: 气候减缓与适应
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作者单位: Applied Physics Laboratory, The Johns Hopkins University, Laurel, MD, United States; Department of Physics, University of Maryland, College Park, MD, United States
Recommended Citation:
Allen R.C.,Mitchell D.G.,Paranicas C.P.,et al. Internal Versus External Sources of Plasma at Saturn: Overview From Magnetospheric Imaging Investigation/Charge-Energy-Mass Spectrometer Data[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(6)