2 papers
nlin.CD2022
Biquadratic Nontwist Map: a model for shearless bifurcations
G. C. Grime, M. Roberto, R. L. Viana +2
Area-preserving nontwist maps are used to describe a broad range of physical systems. In those systems, the violation of the twist condition leads to nontwist characteristic phenom…
physics.plasm-ph2018
Influence of the Radial Electric Field on the Shearless Transport Barriers in Tokamaks
F. A. Marcus, M. Roberto, I. L. Caldas +2
In tokamaks, internal transport barriers, produced by modifications of the plasma current profile, reduce particle transport and improve plasma confinement. The triggering of the i…