PMO OpenIR  > 太阳和太阳系等离子体研究团组
Recent progress in nonlinear kinetic Alfven waves
Wu, DJ; Chao, JK
2004
Source PublicationNONLINEAR PROCESSES IN GEOPHYSICS
ISSN1023-5809
Volume11Issue:5-6Pages:631-645
AbstractThis paper presents a review of recent progress in nonlinear kinetic Alfven wave (KAW hereafter). We start with the two-fluid theory of KAWs and show how the difference between the motions of electrons and ions in small-scale fields of KAWs modifies the Alfven wave properties. Then, we focus on nonlinear solitary structures of KAWs. A general criterion of the existence for solitary KAW (SKAW hereafter) and its exact analytical solution in a low-beta plasma (beta < m(e)/m(i)) are presented, where the electron drift velocity along the, background magnetic field is larger than the thermal speed within a SKAW, and hence can excite, for instance, ion acoustic turbulence as showed by in situ observations of satellite. in space plasmas. In consequence, the turbulence results in kinetic dissipation of the SKAW and dynamical evolution in its structure. We further discuss the structure of the dissipated SKAW (DSKAW hereafter) that evolves from the SKAW due to the dissipation. The result shows that the DSKAW has a local shock-like structure in its density profile and a net electric potential drop over the shock-like structure. In particular, the electric potential drop of the DSKAW can be expected to accelerate electrons efficiently to the order of the loca Alfven speed. The application of the DSKAW acceleration mechanism to the auroral electron acceleration is also discussed. Finally, a few perspectives of KAW studies in future are presented.
KeywordLow-beta-plasma Auroral Electron Acceleration Ion-acoustic-waves Solitary Waves High-latitude 3-dimensional Stability Particle-acceleration Double-layers Ionosphere Temperature
Subject AreaGeochemistry & Geophysics ; Meteorology & Atmospheric Sciences
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordLOW-BETA-PLASMA ; AURORAL ELECTRON ACCELERATION ; ION-ACOUSTIC-WAVES ; SOLITARY WAVES ; HIGH-LATITUDE ; 3-DIMENSIONAL STABILITY ; PARTICLE-ACCELERATION ; DOUBLE-LAYERS ; IONOSPHERE ; TEMPERATURE
Indexed BySCI
Language英语
WOS Research AreaGeochemistry & Geophysics ; Meteorology & Atmospheric Sciences
WOS SubjectGeochemistry & Geophysics ; Meteorology & Atmospheric Sciences
WOS IDWOS:000226836600011
Citation statistics
Cited Times:39[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/7762
Collection太阳和太阳系等离子体研究团组
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.NCU, Inst Space Sci, Chungli 32001, Taiwan
Recommended Citation
GB/T 7714
Wu, DJ,Chao, JK. Recent progress in nonlinear kinetic Alfven waves[J]. NONLINEAR PROCESSES IN GEOPHYSICS,2004,11(5-6):631-645.
APA Wu, DJ,&Chao, JK.(2004).Recent progress in nonlinear kinetic Alfven waves.NONLINEAR PROCESSES IN GEOPHYSICS,11(5-6),631-645.
MLA Wu, DJ,et al."Recent progress in nonlinear kinetic Alfven waves".NONLINEAR PROCESSES IN GEOPHYSICS 11.5-6(2004):631-645.
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