Nontwist symplectic maps in tokamaks
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
|---|---|
| Data(s) |
01/11/2013
01/11/2013
2012
|
| Resumo |
We review symplectic nontwist maps that we have introduced to describe Lagrangian transport properties in magnetically confined plasmas in tokamaks. These nontwist maps are suitable to describe the formation and destruction of transport barriers in the shearless region (i.e., near the curve where the twist condition does not hold). The maps can be used to investigate two kinds of problems in plasmas with non-monotonic field profiles: the first is the chaotic magnetic field line transport in plasmas with external resonant perturbations. The second problem is the chaotic particle drift motion caused by electrostatic drift waves. The presented analytical maps, derived from plasma models with equilibrium field profiles and control parameters that are commonly measured in plasma discharges, can be used to investigate long-term transport properties. (C) 2011 Elsevier B.V. All rights reserved. FAPESP FAPESP CNPq CNPq CAPES CAPES MCT/CNEN (Rede Nacional de Fusao) MCT/CNEN (Rede Nacional de Fusao) Fundacao Araucaria (State of Parana) Fundacao Araucaria (State of Parana) |
| Identificador |
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION, AMSTERDAM, v. 17, n. 5, Special Issue, supl. 1, Part 3, pp. 2021-2030, MAY, 2012 1007-5704 http://www.producao.usp.br/handle/BDPI/37490 10.1016/j.cnsns.2011.05.040 |
| Idioma(s) |
eng |
| Publicador |
ELSEVIER SCIENCE BV AMSTERDAM |
| Relação |
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION |
| Direitos |
closedAccess Copyright ELSEVIER SCIENCE BV |
| Palavras-Chave | #SYMPLECTIC MAPS #NONTWIST SYSTEMS #TOKAMAKS #ERGODIC MAGNETIC LIMITER #FIELD LINES #TORE-SUPRA #TRANSPORT #OPERATION #BARRIER #DIVERTOR #ISLANDS #PLASMAS #MATHEMATICS, APPLIED #MATHEMATICS, INTERDISCIPLINARY APPLICATIONS #MECHANICS #PHYSICS, FLUIDS & PLASMAS #PHYSICS, MATHEMATICAL |
| Tipo |
article original article publishedVersion |
