Roberto, M.; da Silva, E.C.; Caldas, I.L.; Viana, R.L. - In: Physica A: Statistical Mechanics and its Applications 342 (2004) 1, pp. 363-369
We investigated the structure of magnetic field lines in a tokamak with reversed magnetic shear and non-symmetric perturbations by means of analytically derived area-preserving non-twist Poincaré maps. The maps are used to study magnetic island dimerization and the formation of a transport...