89 citations · 598 across the 50 of their papers we have counts for
6 papers · 1 filter
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…
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…
Symplectic Maps for Diverted Plasmas
I. L. Caldas, B. F. Bartoloni, D. Ciro +8
Nowadays, divertors are used in the main tokamaks to control the magnetic field and to improve the plasma confinement. In this article, we present analytical symplectic maps descri…
Effect of a Dissipative Term in the Drift Waves Hamiltonian System
Ricardo S. Oyarzabal, José D. Szezech Júnior, Antonio M. Batista +3
This paper analyses the Hamiltonian model of drift waves which describes the chaotic transport of particles in the plasma confinement. With one drift wave the system is integrable…
Escape patterns due to ergodic magnetic limiters in tokamaks with reversed magnetic shear
Marisa Roberto, Elton C. Da Silva, Ibere L. Caldas +1
In this work we study the ergodic magnetic limiters (EML) action on field lines from the point of view of a chaotic scattering process, considering the so-called exit basins, or se…