Plasmas are created by heating gases through the absorption of ionizing radiation in the
visible through the ultraviolet part of the electromagnetic spectrum and through collisional …

Barriers have been identified in magnetically confined plasmas by reducing the particle
transport and improving the confinement. One of them, the primary shearless barriers, is …

Nontwist systems, common in the dynamical descriptions of fluids and plasmas, possess a
shearless curve with a concomitant transport barrier that eliminates or reduces chaotic …

We investigate chaotic impurity transport in toroidal fusion plasmas (tokamaks) from the
point of view of passive advection of charged particles due to E× B drift motion. We use …

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 the …

In fluids and plasmas with zonal flow reversed shear, a peculiar kind of transport barrier
appears in the shearless region, one that is associated with a proper route of transition to …

The E× B drift motion of particles in tokamaks provides valuable information on the
turbulence-driven anomalous transport. One of the characteristic features of the drift motion …

Shearless transport barriers appear in confined plasmas due to non-monotonic radial
profiles and cause localized reduction of transport even after they have been broken. In this …

GG Grenfell, IC Nascimento, DS Oliveira, ZO Guimarães-Filho, JI Elizondo, AP Reis, RMO
Galvão, WAH Baquero, AM Oliveira, G. Ronchi, WP de Sá, JHF Severo, T CABR Team; H …

In tokamaks, internal transport barriers, produced by modifications of the plasma current
profile, reduce particle transport and improve plasma confinement. The triggering of the …