Nonlinear Structures in Space and Laboratory Plasmas
نویسندگان
چکیده
Coherent nonlinear structures in the form of vortical motions are frequently observed in laboratory devices and in auroral plasmas. Our objective here is to suggest that any realistic description of plasma vortices must involve three-dimensional nonlinear wave models, which account for the nonlinear coupling between finite amplitude electrostatic and/or electromagnetic disturbances. Specifically, we shall discuss properties of various types of vortex structures that are associated with nonlinear convective cells, drift and interchange modes as well as with nonlinear inertial Alfvkn waves. We hope that the present investigation shall provide a guideline for understanding the properties of various nonlinear structures in space and laboratory plasmas.
منابع مشابه
New analytical soliton type solutions for double layers structure model of extended KdV equation
In this present study the double layers structure model of extended Korteweg-de Vries(K-dV) equation will be obtained with the help of the reductive perturbation method, which admits a double layer structure in current plasma model. Then by using of new analytical method we obtain the new exact solitary wave solutions of this equation. Double layer is a structure in plasma and consists of two p...
متن کاملMeasurements of impulsive reconnection driven by nonlinear Hall dynamics
Related Articles Kinetic simulations of the structures of magnetic island in multiple X line guide field reconnection Phys. Plasmas 19, 042111 (2012) Numerical simulations of separatrix instabilities in collisionless magnetic reconnection Phys. Plasmas 19, 042110 (2012) Magnetic reconnection and stochastic plasmoid chains in high-Lundquist-number plasmas Phys. Plasmas 19, 042303 (2012) Magnetic...
متن کاملNonlinear evolution of inertial Alfvén wave turbulence
Some recent experimental observations have been shown that inclusion of electron collisions damping in inertial Alfvén wave (IAW) dynamics may be important for laboratory as well as space plasmas. This paper presents the numerical simulation of model equation governing the nonlinear dynamics of IAW in low-beta plasmas. When the nonlinearity arises due to the ponderomotive force and Joule heatin...
متن کاملSimplest Equation Method for nonlinear solitary waves in Thomas- Fermi plasmas
The Thomas-Fermi (TF) equation has proved to beuseful for the treatment of many physical phenomena. In this pa-per, the traveling wave solutions of the KdV equation is investi-gated by the simplest equation method. Also, the effect of differentparameters on these solitary waves is considered. The numericalresults is conformed the good accuracy of presented method.
متن کاملNonlinear frequency oscillation of Alfvén eigenmodes in fusion plasmas.
A nonlinear oscillation of frequency and amplitude is found by massively parallel gyrokinetic simulations of Alfvén eigenmodes excited by energetic particles in toroidal plasmas. The fast and repetitive frequency chirping is induced by the evolution of coherent structures in the phase space. The dynamics of the coherent structures is controlled by the competition between the phase-space island ...
متن کامل