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DOI | 10.1002/2017GL075892 |
Very Oblique Whistler Mode Propagation in the Radiation Belts: Effects of Hot Plasma and Landau Damping | |
Ma, Q.1,2; Artemyev, A. V.3; Mourenas, D.4; Li, W.1,2; Thorne, R. M.1; Kletzing, C. A.5; Kurth, W. S.5; Hospodarsky, G. B.5; Reeves, G. D.6; Spence, H. E.7; Wygant, J.8 | |
2017-12-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:24 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; France |
英文摘要 | Satellite observations of a significant population of very oblique chorus waves in the outer radiation belt have fueled considerable interest in the effects of these waves on energetic electron scattering and acceleration. However, corresponding diffusion rates are extremely sensitive to the refractive index N, controlled by hot plasma effects including Landau damping and wave dispersion modifications by suprathermal (15-100 eV) electrons. A combined investigation of wave and electron distribution characteristics obtained from the Van Allen Probes shows that peculiarities of the measured electron distribution significantly reduce Landau damping, allowing wave propagation with high N similar to 100-200. Further comparing measured refractive indexes with theoretical estimates incorporating hot plasma corrections to the wave dispersion, we provide the first experimental demonstration that suprathermal electrons indeed control the upper limit of the refractive index of highly oblique whistler mode waves. Such results further support the importance of incorporating very oblique waves into radiation belt models. |
英文关键词 | oblique chorus waves maximum refractive index thermal electron effects Landau damping Van Allen Probes observation |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000422954700019 |
WOS关键词 | MAGNETOSPHERIC PLASMA ; ION TEMPERATURE ; WAVES ; ELECTRON ; CHORUS ; SCATTERING |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/25963 |
专题 | 气候变化 |
作者单位 | 1.Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA 90095 USA; 2.Boston Univ, Ctr Space Phys, Boston, MA 02215 USA; 3.Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90024 USA; 4.CEA, DAM, DIF, Arpajon, France; 5.Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA; 6.Los Alamos Natl Lab, Space Sci & Applicat Gr, Los Alamos, NM USA; 7.Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA; 8.Univ Minnesota Twin Cities, Sch Phys & Astron, Minneapolis, MN USA |
推荐引用方式 GB/T 7714 | Ma, Q.,Artemyev, A. V.,Mourenas, D.,et al. Very Oblique Whistler Mode Propagation in the Radiation Belts: Effects of Hot Plasma and Landau Damping[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(24). |
APA | Ma, Q..,Artemyev, A. V..,Mourenas, D..,Li, W..,Thorne, R. M..,...&Wygant, J..(2017).Very Oblique Whistler Mode Propagation in the Radiation Belts: Effects of Hot Plasma and Landau Damping.GEOPHYSICAL RESEARCH LETTERS,44(24). |
MLA | Ma, Q.,et al."Very Oblique Whistler Mode Propagation in the Radiation Belts: Effects of Hot Plasma and Landau Damping".GEOPHYSICAL RESEARCH LETTERS 44.24(2017). |
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