搜索结果: 1-15 共查到“空间物理学 plasmas”相关记录21条 . 查询时间(0.097 秒)
Electrostatic Structures in Space Plasmas: Stability of Two-dimensional Magnetic Bernstein-Greene-Kruskal Modes
Electrostatic structures, BGK modes, Solitons, Plasma kinetic equations
2011/9/5
Electrostatic structures have been observed in many regions of space plasmas, including the solar wind, the magnetosphere, the auroral acceleration region, and in association with shocks, turbulence, ...
Dromion solutions for nonlinear electron acoustic waves in space plasmas
Dromion solutions nonlinear electron acoustic waves space plasmas
2009/11/12
Recent high resolution measurements of POLAR and FAST satellites have revealed two-dimensional coherent structures in the polar cap boundary layer (PCBL) region. Since the ion temperature is often obs...
Solitons and oscillitons in multi-ion space plasmas
Solitons oscillitons multi-ion space plasmas
2009/11/11
It is well known that additional low-frequency waves arise when a second ion population is added to a plasma normally consisting of protons and electrons. Here, we investigate stationary structures st...
Results on the formation and propagation of electron phase space vortices from laboratory experiments are summarized. The electron phase space vortices were excited in a strongly magnetized Q-machine ...
Excitation of kinetic Alfvén turbulence by MHD waves and energization of space plasmas
kinetic Alfvén turbulence MHD waves energization of space plasmas
2009/11/11
There is abundant observational evidence that the energization of plasma particles in space is correlated with an enhanced activity of large-scale MHD waves. Since these waves cannot interact with par...
Anomalous width variation of rarefactive ion acoustic solitary waves in the context of auroral plasmas
rarefactive ion acoustic solitary waves context of auroral plasmas
2009/11/11
The presence of dynamic, large amplitude solitary waves in the auroral regions of space is well known. Since their velocities are of the order of the ion acoustic speed, they may well be considered as...
On the nonexistence of large amplitude stationary solitary waves in symmetric unmagnetized pair plasmas
large amplitude stationary solitary waves symmetric unmagnetized pair plasmas
2009/11/11
Waves in pair plasmas have a fundamentally different dispersion due to the equal charge-to-mass ratios between negative and positive charges. In view of possible applications e.g. to electron-positron...
Nonlinear compressional electromagnetic ion-cyclotron wavepackets in space plasmas
Nonlinear compressional electromagnetic ion-cyclotron wavepackets space plasmas
2009/11/9
The parametric coupling between large amplitude magnetic field-aligned circularly polarized electromagnetic ion-cyclotron (EMIC) waves and ponderomotively driven ion-acoustic perturbations in magnetiz...
Exact theory for localized envelope modulated electrostatic wavepackets in space and dusty plasmas
Exact theory localized envelope electrostatic wavepackets space and dusty plasmas
2009/11/9
Abundant evidence for the occurrence of modulated envelope plasma wave packets is provided by recent satellite missions. These excitations are characterized by a slowly varying localized envelope stru...
A nonextensive statistics approach for Langmuir waves in relativistic plasmas
nonextensive statistics approach Langmuir waves relativistic plasmas
2009/11/9
The nonextensive statistics formalism proposed by Tsallis has found many applications in systems with memory effects, long range spatial correlations, and in general whenever the phase space has fract...
Numerical simulations of the charging of dust particles by contact with hot plasmas
Numerical simulations dust particles hot plasmas
2009/11/3
Charging of individual dust particles in contact with hot plasmas is studied by numerical methods. The dust particle is treated as a rigid solid body, composed by either perfectly insulating or conduc...
On MHD waves,fire-hose and mirror instabilities in anisotropic plasmas
MHD waves fire-hose mirror instabilities anisotropic plasmas
2009/11/3
Temperature or pressure anisotropies are characteristic of space plasmas, standard magnetohydrodynamic (MHD) model for describing large-scale plasma phenomena however usually assumes isotropic pressur...
Study of nonlinear ion- and electron-acoustic waves in multi-component space plasmas
nonlinear ion- and electron-acoustic waves multi-component space plasmas
2009/11/2
Large amplitude ion-acoustic and electron-acoustic waves in an unmagnetized multi-component plasma system consisting of cold background electrons and ions, a hot electron beam and a hot ion beam are s...
Dispersive MHD waves and alfvenons in charge non-neutral plasmas
Dispersive MHD waves alfvenons non-neutral plasmas
2009/11/2
Dispersive properties of linear and nonlinear MHD waves, including shear, kinetic, electron inertial Alfvén, and slow and fast magnetosonic waves are analyzed using both analytical expansions and a no...
Dust-acoustic solitary structures in plasmas with nonthermal electrons and positive dust
Dust-acoustic solitary structures plasmas nonthermal electrons positive dust
2009/11/2
Large dust-acoustic solitons and kinks in dusty plasmas with positive cold dust, nonthermally distributed electrons and Boltzmann ions have been studied in a systematic way, to delimit their compositi...