Fractal structures in nonlinear plasma physics


Autoria(s): Viana, Ricardo Luiz; Silva, Elton Cesar da; Kroetz, Tiago; Caldas, Ibere Luiz; Roberto, Marisa; Sanjuan, M A F
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

20/10/2012

20/10/2012

2011

Resumo

Fractal structures appear in many situations related to the dynamics of conservative as well as dissipative dynamical systems, being a manifestation of chaotic behaviour. In open area-preserving discrete dynamical systems we can find fractal structures in the form of fractal boundaries, associated to escape basins, and even possessing the more general property of Wada. Such systems appear in certain applications in plasma physics, like the magnetic field line behaviour in tokamaks with ergodic limiters. The main purpose of this paper is to show how such fractal structures have observable consequences in terms of the transport properties in the plasma edge of tokamaks, some of which have been experimentally verified. We emphasize the role of the fractal structures in the understanding of mesoscale phenomena in plasmas, such as electromagnetic turbulence.

FAPESP

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

CNPq

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

CAPES

Financiadora de Estudos e Projetos (FINEP)

FINEP/CNEN (Brazilian Fusion Network)

Spanish Ministry of Education and Science

Spanish Ministry of Education and Science[FIS2006-08525]

Spanish Ministry of Science and Innovation

Spanish Ministry of Science and Innovation[FIS2009-09898]

Identificador

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, v.369, n.1935, p.371-395, 2011

1364-503X

http://producao.usp.br/handle/BDPI/29014

10.1098/rsta.2010.0253

http://dx.doi.org/10.1098/rsta.2010.0253

Idioma(s)

eng

Publicador

ROYAL SOC

Relação

Philosophical Transactions of the Royal Society A-mathematical Physical and Engineering Sciences

Direitos

restrictedAccess

Copyright ROYAL SOC

Palavras-Chave #fractal sets #tokamaks #magnetic field lines #area-preserving maps #open Hamiltonian systems #MAGNETIC-FIELD LINES #OPEN HYDRODYNAMICAL FLOWS #WADA BASIN BOUNDARIES #ERGODIC DIVERTOR #HAMILTONIAN-DYNAMICS #HOMOCLINIC TANGLES #SCRAPE-OFF #TOKAMAK #TRANSPORT #LIMITER #Multidisciplinary Sciences
Tipo

article

original article

publishedVersion