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DOI | 10.1029/2018GL077877 |
Test-Particle Simulations of Linear and Nonlinear Interactions Between a 2-D Whistler-Mode Wave Packet and Radiation Belt Electrons | |
da Silva, C. L.1,2; Denton, R. E.3; Hudson, M. K.3; Millan, R. M.3; Liu, K.4; Bortnik, J.5 | |
2018-06-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:11页码:5234-5245 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Using test-particle simulations, we describe (in 2-D) the interaction of an ensemble of electrons with a discrete whistler-mode wave packet, which propagates with a moderate wave-normal angle with respect to the background magnetic field. We evaluate both the average transport coefficients used in quasi-linear diffusion transport and also the full nonlinear wave-particle interactions. The magnitude of the calculated diffusion coefficients is found to increase proportionally to the wave amplitude squared, in agreement with quasi-linear diffusion theory. Cyclotron resonance of counterstreaming electrons (n = 1 harmonic number) is more important for pitch angle scattering than Landau resonance. Landau resonance of costreaming electrons (n = 0) is comparable to cyclotron resonance for energy diffusion and advection. Strong acceleration of high pitch angle, costreaming electrons arises in nonlinear wave-particle interactions with high-amplitude waves. In our simulations with zero parallel electric field, the energy source for electron acceleration is the wave's perpendicular electric field, in both the cyclotron and Landau resonances. The Landau resonance can happen even with zero parallel electric field, if the wave packet propagates with a finite wave-normal angle. This resonance between the particle's azimuthal velocity and the wave fields leads to trapping and substantial parallel acceleration. |
英文关键词 | chorus whistler-mode waves radiation belts wave-particle interactions cyclotron resonance Landau resonance |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000436249900001 |
WOS关键词 | LOCAL ACCELERATION ; CHORUS ; DIFFUSION ; MAGNETOSPHERE ; PLASMA ; FIELD ; LOSSES |
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/28172 |
专题 | 气候变化 |
作者单位 | 1.New Mexico Inst Min & Technol, Dept Phys, Socorro, NM 87801 USA; 2.New Mexico Inst Min & Technol, Langmuir Lab, Socorro, NM 87801 USA; 3.Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA; 4.Auburn Univ, Dept Phys, Auburn, AL 36849 USA; 5.Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA USA |
推荐引用方式 GB/T 7714 | da Silva, C. L.,Denton, R. E.,Hudson, M. K.,et al. Test-Particle Simulations of Linear and Nonlinear Interactions Between a 2-D Whistler-Mode Wave Packet and Radiation Belt Electrons[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(11):5234-5245. |
APA | da Silva, C. L.,Denton, R. E.,Hudson, M. K.,Millan, R. M.,Liu, K.,&Bortnik, J..(2018).Test-Particle Simulations of Linear and Nonlinear Interactions Between a 2-D Whistler-Mode Wave Packet and Radiation Belt Electrons.GEOPHYSICAL RESEARCH LETTERS,45(11),5234-5245. |
MLA | da Silva, C. L.,et al."Test-Particle Simulations of Linear and Nonlinear Interactions Between a 2-D Whistler-Mode Wave Packet and Radiation Belt Electrons".GEOPHYSICAL RESEARCH LETTERS 45.11(2018):5234-5245. |
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