Plasma confinement in tokamaks with robust torus

C.G.L. Martins, R. Egydio de Carvalho, I.L. Caldas and M. Roberto

Physica A: Statistical Mechanics and its Applications, 2011, vol. 390, issue 5, 957-962

Abstract: We present a non-linear symplectic map that describes the alterations of the magnetic field lines inside the tokamak plasma due to the presence of a robust torus (RT) at the plasma edge. This RT prevents the magnetic field lines from reaching the tokamak wall and reduces, in its vicinity, the islands and invariant curve destruction due to resonant perturbations. The map describes the equilibrium magnetic field lines perturbed by resonances created by ergodic magnetic limiters (EMLs). We present the results obtained for twist and non-twist mappings derived for monotonic and non-monotonic plasma current density radial profiles, respectively. Our results indicate that the RT implementation would decrease the field line transport at the tokamak plasma edge.

Keywords: Robust tori; Transport barriers; Chaos; Non-linear map; Hamiltonian system (search for similar items in EconPapers)
Date: 2011
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:390:y:2011:i:5:p:957-962

DOI: 10.1016/j.physa.2010.11.025

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