8 papers
The Role of Phase and Spatial Modes in Wave-Induced Plasma Transport
L. F. B. Souza, Y. Elskens, R. Egydio de Carvalho +1
We derive a two-dimensional symplectic map for particle motion at the plasma edge by modeling the electrostatic potential as a superposition of integer spatial harmonics with relat…
Isochronous bifurcations dependence on the driving mode phase shift in two-harmonic standard maps
Michele Mugnaine, Ricardo L. Viana, Alfredo M. Ozorio de Almeida +2
Some dynamical properties of nonlinear coupled systems can be described by the two-harmonic standard map, a two-dimensional area-preserving system with two parameters, where two di…
Hamiltonian chaos for one particle with two waves: Self-consistent dynamics
Matheus Jean Lazarotto, Iberê Luiz Caldas, Yves Elskens
A simple model of wave-particle interaction is studied in its self-consistent form, that is, where the particles are allowed to feedback on the waves dynamics. We focus on the conf…
Non-autonomous standard nontwist map
Marcos V. de Moraes, Iberê L. Caldas, Yves Elskens
Area-preserving nontwist maps locally violate the twist condition, giving rise to shearless curves. Nontwist systems appear in different physical contexts, such as plasma physics,…
Effective transport barriers in the biquadratic nontwist map
Gabriel C. Grime, Ricardo L. Viana, Yves Elskens Iberê L. Caldas
Nontwist area-preserving maps violate the twist condition at specific orbits, resulting in shearless invariant curves that prevent chaotic transport. Plasmas and fluids with nonmon…
Larmor radius effect on the control of chaotic transport in tokamaks
L. A. Osorio-Quiroga, M. Roberto, R. L. Viana +2
We investigate the influence of the finite Larmor radius on the dynamics of guiding-center test particles subjected to an drift in a large aspect-rat…