DOI: 10.1002/grl.50789
论文题名: Analysis of EMIC-wave-moderated flux limitation of measured energetic ion spectra in multispecies magnetospheric plasmas
作者: Mauk B.H.
刊名: Geophysical Research Letters
ISSN: 0094-8736
EISSN: 1944-8467
出版年: 2013
卷: 40, 期: 15 起始页码: 3804
结束页码: 3808
语种: 英语
英文关键词: energetic ions
; radiation belts
; ring current
; Van Allen Probes
Scopus关键词: Charge exchanges
; Earth magnetosphere
; Energetic ion
; Ion intensities
; Magnetospheric plasmas
; Radial position
; Ring currents
; Spectral shapes
; Charge transfer
; Plasmas
; Probes
; Radiation belts
; Ions
; acceleration
; electromagnetic field
; electromagnetic wave
; magnetosphere
; parameterization
; plasma
; storm
; wave field
英文摘要: A differential Kennel-Petschek (KP) flux limit for magnetospheric energetic ions is devised taking into account multiple ion species effects on electromagnetic ion cyclotron (EMIC) waves that scatter the ions. The idea is that EMIC waves may limit the highest ion intensities during acceleration phases of storms and substorms (∼ hour) while other mechanisms (e.g., charge exchange) may account for losses below those limits and over longer periods of time. This approach is applied to published Earth magnetosphere energetic ion spectra (∼ keV to ∼1 MeV) for radial positions (L) 3 to 6.7 R E. The flatness of the most intense spectral shapes for <100 keV indicate sculpting by just such a mechanism, but modifications of traditional KP parameters are needed to account for maximum fluxes up to 5.4 times greater than expected. Future work using the new capabilities of the Van Allen Probes mission will likely resolve outstanding uncertainties. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84881271238&doi=10.1002%2fgrl.50789&partnerID=40&md5=b02f6d14b93ef8554d367fdb95b3f05d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6000
Appears in Collections: 气候减缓与适应
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作者单位: Johns Hopkins University, Applied Physics Laboratory, 11100 Johns Hopkins Rd., Laurel, MD 20723, United States
Recommended Citation:
Mauk B.H.. Analysis of EMIC-wave-moderated flux limitation of measured energetic ion spectra in multispecies magnetospheric plasmas[J]. Geophysical Research Letters,2013-01-01,40(15).