DOI: 10.1002/2014GL061787
论文题名: Finite difference modeling of coherent wave amplification in the Earth's radiation belts
作者: Harid V. ; Gołkowski M. ; Bell T. ; Li J.D. ; Inan U.S.
刊名: Geophysical Research Letters
ISSN: 0094-9523
EISSN: 1944-9254
出版年: 2014
卷: 41, 期: 23 起始页码: 8193
结束页码: 8200
语种: 英语
英文关键词: coherent wave instability
; cyclotron instability
; magnetosphere
; phase space
; radiation belts
; wave amplification
Scopus关键词: Geomagnetism
; Magnetosphere
; Maxwell equations
; Nonlinear equations
; Numerical methods
; Phase space methods
; Plasma simulation
; Vlasov equation
; Coherent waves
; Cyclotron instability
; Earth's radiation belts
; Finite difference model
; Particle in cell method
; Vlasov-Maxwell system
; Wave amplification
; Wave-particle interactions
; Radiation belts
; amplitude
; Earth structure
; electromagnetic radiation
; finite difference method
; nonlinearity
; numerical method
; parameterization
; resonance
; wave field
; wave modeling
; Antarctica
英文摘要: Modeling of gyroresonant wave-particle interactions in the radiation belts requires solving the Vlasov-Maxwell system of equations in an inhomogenous background geomagnetic field. Previous works have employed particle-in-cell methods or Eulerian solvers (such as the Vlasov Hybrid Simulation code) to provide numerical solutions to the problem. In this report, we provide an alternative numerical approach by utilizing a first order finite difference upwind scheme. When coupled to the narrowband Maxwell's equations, the model reproduces linear as well as nonlinear wave growth of coherent signals. Wave growth is nonlinear growth when the wave amplitude exceeds the minimum value for phase trapping of counterstreaming particles and is linear otherwise. The model also demonstrates free-running frequency variation for a case with a high linear growth rate. In addition, the model confirms the theoretical prediction of a stable "phase-space hole" during the nonlinear growth process. The plasma parameters and L shell used in this study are typical of those associated with the Siple Station wave injection experiment. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921611885&doi=10.1002%2f2014GL061787&partnerID=40&md5=061d6b6c5a80b7e817a0cf3144407a38
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6787
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Electrical Engineering, Stanford University, Stanford, CA, United States
Recommended Citation:
Harid V.,Gołkowski M.,Bell T.,et al. Finite difference modeling of coherent wave amplification in the Earth's radiation belts[J]. Geophysical Research Letters,2014-01-01,41(23).