46 citations · 346 across the 50 of their papers we have counts for
51 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…
A nontwist field line mapping in a tokamak with ergodic magnetic limiter
Michele Mugnaine, José D. Szezech, Ricardo L. Viana +1
For tokamaks with uniform magnetic shear, Martin and Taylor have proposed a symplectic map has been used to describe the magnetic field lines at the plasma edge perturbed by an erg…
Hamiltonian description for magnetic field lines: a tutorial
Ricardo L. Viana, Michele Mugnaine, Iberê L. Caldas
Under certain circumstances, the equations for the magnetic field lines can be recast in a canonical form, after defining a suitable field line Hamiltonian. This analogy is extreme…
Isochronous island bifurcations driven by resonant magnetic perturbations in Tokamaks
B. B. Leal, I. L. Caldas, M. C. de Sousa +2
Recent evidences show that heteroclinic bifurcations in magnetic islands may be caused by the amplitude variation of resonant magnetic perturbations in tokamaks. To investigate the…
Fractal and Wada escape basins in the chaotic particle drift motion in tokamaks
Leonardo C. Souza, Amanda C. Mathias, Iberê L. Caldas +2
The drift motion of particles in tokamaks provides valuable information on the turbulence-driven anomalous transport. One of the characteristic features of t…
Shaping the edge radial electric field to create shearless transport barriers in tokamaks
L. A. Osorio-Quiroga, M. Roberto, I. L. Caldas +2
In tokamak-confined plasmas, particle transport can be reduced by modifying the radial electric field. In this paper, we investigate the influence of both a well-like and a hill-li…