Articolo in rivista, 2018, ENG, 10.1063/1.5020164

Coherent transport structures in magnetized plasmas. II. Numerical results

Di Giannatale, G.; Falessi, M. V.; Grasso, D.; Pegoraro, F.; Schep, T. J.

CNR; ENEA CR Frascati; Roma Tre Univ; CNR; Politecn Torino; Univ Pisa; Eindhoven Univ Technol

In a pair of linked articles (called Papers I and II, respectively), we apply the concept of Lagrangian Coherent Structures borrowed from the study of Dynamical Systems to chaotic magnetic field configurations in order to separate regions where field lines have different kinds of behavior. In the present article, Paper II, by means of a numerical procedure, we investigate the Lagrangian Coherent Structures in the case of a two-dimensional magnetic configuration with two island chains that are generated by magnetic reconnection and evolve nonlinearly in time. The comparison with previous results, obtained by assuming a fixed magnetic field configuration, allows us to explore the dependence of transport barriers on the particle velocity. Published by AIP Publishing.

Physics of plasmas 25 (5)

Keywords

Dynamical systems, Lagrangian Coherent structures, Magetized plasmas, particle transport

CNR authors

Grasso Daniela

CNR institutes

ISC – Istituto dei sistemi complessi