| DOI: | 10.1002/2015GL063874
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| 论文题名: | Resonant and nonresonant whistlers-particle interaction in the radiation belts |
| 作者: | Camporeale E.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9228
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| EISSN: | 1944-8959
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| 出版年: | 2015
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| 卷: | 42, 期:9 | | 起始页码: | 3114
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| 结束页码: | 3121
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| 语种: | 英语
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| 英文关键词: | Particle-in-Cell simulations
; Radiation belt
; Wave-particle interactions
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| Scopus关键词: | Anisotropy
; Diffusion
; Particle interactions
; Radiation belts
; Wave plasma interactions
; First principles
; Marginal stability
; Non-linear theory
; Particle-in-cell simulations
; Relativistic electron
; Resonance condition
; Temperature anisotropy instability
; Wave-particle interactions
; Atmospherics
; anisotropy
; electromagnetic radiation
; magnetic field
; nonlinearity
; particle motion
; resonance
; simulation
; Pachycephalidae
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| 英文摘要: | We study the wave-particle interactions between lower band chorus whistlers and an anisotropic tenuous population of relativistic electrons. We present the first direct comparison of first-principle particle-in-cell (PIC) simulations with a quasi-linear diffusion code. In the PIC approach, the waves are self-consistently generated by the temperature anisotropy instability that quickly saturates and relaxes the system toward marginal stability. We show that the quasi-linear diffusion and PIC results have significant quantitative mismatch in regions of energy/pitch angle where the resonance condition is not satisfied. Moreover, for pitch angles close to the loss cone the diffusion code overestimates the scattering, particularly at low energies. This suggests that higher-order nonlinear theories should be taken in consideration in order to capture nonresonant interactions, resonance broadening, and to account for scattering at angles close to 90°. Key Points Standard diffusion codes overestimate pitch angle scattering at small angles Relative importance of nonresonant interactions Quantitative important mismatches between PIC and diffusion simulations ©2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930474100&doi=10.1002%2f2015GL063874&partnerID=40&md5=2d57ea7e98a466f4b0ae9ffc00fcd413
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/8844
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Center for Mathematics and Computer Science (CWI), Amsterdam, Netherlands
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| Recommended Citation: | |
Camporeale E.. Resonant and nonresonant whistlers-particle interaction in the radiation belts[J]. Geophysical Research Letters,2015-01-01,42(9).
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