There are numerous physical situations in which a hole or leak is introduced in an otherwise
closed chaotic system. The leak can have a natural origin, it can mimic measurement …

This paper offers a review while also studying yet unexplored features of the area of chaotic
systems subjected to parameter drift of non-negligible rate, an area where the methods of …

We propose a one-dimensional dynamical system, the sine-circle nontwist map, that can be
considered a local approximation of the standard nontwist map and an extension of the …

Recent evidence shows that heteroclinic bifurcations in magnetic islands may be caused by
the amplitude variation of resonant magnetic perturbations in tokamaks. To investigate the …

Focusing on the standard map of the kicked rotor, we investigate the effects of classical
stickiness (orbits temporarily confined to a region of a chaotic phase space) on an open …

Fractal structures appear in many situations related to the dynamics of conservative as well
as dissipative dynamical systems, being a manifestation of chaotic behaviour. In open area …

Hamiltonian systems with a nonmonotonic frequency profile are called nontwist. One of the
key properties of such systems, depending on adjustable parameters, is the presence of 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 …

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 …

We consider open non-twist Hamiltonian systems represented by an area-preserving two-
dimensional map describing incompressible planar flows in the reference frame of a …