Chaotic transport is a subject of paramount importance in a variety of problems in plasma
physics, specially those related to anomalous transport and turbulence. On the other hand, a …

Motivated by the losses of runaway electrons during disruptive events in present and future
tokamaks like the ITER, we investigate the transport in mixed phase space Hamiltonian …

The magnetic field line structure in a tokamak can be obtained by direct numerical
integration of the field line equations. However, this is a lengthy procedure and the analysis …

The main goal of this book is to present and discuss many of the common scaling properties
observed in some nonlinear dynamical systems described by mappings. The …

For tokamaks with uniform magnetic shear, Martin and Taylor have proposed a symplectic
map which has been used to describe the magnetic field lines at the plasma edge perturbed …

Investigations of chaotic particle transport by drift waves propagating in the edge plasma of
tokamaks with poloidal zonal flow are described. For large aspect ratio tokamaks, the …

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 attractor …

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 …

We study the motion of a charged particle in a tokamak magnetic field and discuss its chaotic
nature. Contrary to most of recent studies, we do not make any assumption on any constant …

We review symplectic nontwist maps that we have introduced to describe Lagrangian
transport properties in magnetically confined plasmas in tokamaks. These nontwist maps are …