A numerical contour dynamics code has been employed to calculate the stable and unstablemanifolds related to two interacting magnetic island chains. The magnetic configuration is generatedby a nonlinear reconnection process described in D. Borgogno et al. Phys. Plasmas. 12, 0323092005. The appearance of the first homoclinic and heteroclinic intersections of the dominantmanifolds are shown and one of the associated uniformly hyperbolic orbits is given. The stickinessof the field lines around the island and the eventual development of global stochasticity arediscussed. The basic geometry of the magnetic configuration is periodic so that the structure of themanifolds may be compared with the one obtained with Poincaré plots.
Stable and unstable invariant manifolds in a partially chaotic magnetic configuration generated by nonlinear reconnection
D. Borgogno;D. Grasso;F. Pegoraro;
2008
Abstract
A numerical contour dynamics code has been employed to calculate the stable and unstablemanifolds related to two interacting magnetic island chains. The magnetic configuration is generatedby a nonlinear reconnection process described in D. Borgogno et al. Phys. Plasmas. 12, 0323092005. The appearance of the first homoclinic and heteroclinic intersections of the dominantmanifolds are shown and one of the associated uniformly hyperbolic orbits is given. The stickinessof the field lines around the island and the eventual development of global stochasticity arediscussed. The basic geometry of the magnetic configuration is periodic so that the structure of themanifolds may be compared with the one obtained with Poincaré plots.| File | Dimensione | Formato | |
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