Effect of Ion Dynamics on the Evolution of Electron Phase-space Holes

查看全文 作　　者：WANG [1]Peiran;LU [1]Quanming;WU [1]Mingyu;WANG [1]Shui

机构地区：[1]CAS Key Laboratory of Basic Plasma Physics,Department of Geophysics and Planetary Science,University of Science and Technology of China

出　　处：《空间科学学报》索引2013年第33卷第4期,共5页

基　　金：Supported by the National Natural Science Foundation of China(41128004,41274144,41121003,41174124) 摘　　要：The evolution of two-dimensional(2D) electron phase-space holes(electron holes) has been previously investigated with electrostatic Particle-in-Cell(PIC) simulations,which neglect ion dynamics.The electron holes are found to be unstable to the transverse instability,and their evolution is determined by the combined action between the transverse instability and the stabilization by the background magnetic field.In this paper,the effect of ion dynamics on the evolution of an electron hole is studied.In weakly magnetized plasma(Ωe<ωpe,whereΩe andωpe are electron gyrofrequency and plasma frequency,respectively),the electron hole is still unstable to the transverse instability. However,it evolves a little faster and is destroyed in a shorter time when ion dynamics is considered. In strongly magnetized plasma(Ωe>ωpe),the electron hole is broken due to the lower hybrid waves, and its evolution is much faster. 关键词：Ion dynamics Electron holes Transverse instability Magnetized plasma

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Effect of Ion Dynamics on the Evolution of Electron Phase-space Holes

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