21 citations · 56 across the 10 of their papers we have counts for
10 papers
Effects of the Internal Transport Barrier in the plasma confinement with Resonant Magnetic Perturbations
P. Haerter, L. C. Souza, R. L. Viana +1
In the pursuit of steady-state fusion energy, Advanced Tokamak regimes rely on Internal Transport Barriers (ITBs) with reversed magnetic shear. While Resonant Magnetic Perturbation…
Shearless barriers in the conservative Ikeda map
Rodrigo Simile Baroni, Ricardo Egydio de Carvalho, José Danilo Szezech Junior +1
We investigate the dynamics of the Ikeda map in the conservative limit, where it is represented as a two-dimensional area-preserving map governed by two control parameters, and…
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…
Shearless effective barriers to chaotic transport induced by even twin islands in nontwist systems
M. Mugnaine, J. D. Szezech, R. L. Viana +2
For several decades now it has been known that systems with shearless invariant tori, nontwist Hamiltonian systems, possess barriers to chaotic transport. These barriers are resili…
ExB drift particle transport in tokamaks
L. A. Osorio-Quiroga, G. C. Grime, M. Roberto +3
In tokamaks, modification of the plasma profiles can reduce plasma transport, improving particle confinement. However, this improvement is still not completely understood. In this…
Chaotic saddles and interior crises in a dissipative nontwist system
Rodrigo Simile Baroni, Ricardo Egydio de Carvalho, Iberê Luiz Caldas +2
We consider a dissipative version of the standard nontwist map. Nontwist systems present a robust transport barrier, called the shearless curve, that becomes the shearless attracto…
Shearless bifurcations in particle transport for reversed shear tokamaks
G. C. Grime, M. Roberto, R. L. Viana +2
Some internal transport barriers in tokamaks have been related to the vicinity of extrema of the plasma equilibrium profiles. This effect is numerically investigated by considering…
Riddling: Chimera's dilemma
Vagner dos Santos, José Danilo Szezech Júnior, Antonio Marcos Batista +8
We investigate the basin of attraction properties and its boundaries for chimera states in a circulant network of Hénon maps. Chimera states, for which coherent and incoherent doma…
Area-preserving maps models of gyro-averaged chaotic transport
J. D. da Fonseca, D. del-Castillo-Negrete, I. L. Caldas
Discrete maps have been extensively used to model 2-dimensional chaotic transport in plasmas and fluids. Here we focus on area-preserving maps describing finite Larmor radius (FLR)…