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Master's Dissertation
DOI
10.11606/D.43.2008.tde-20052008-100207
Document
Author
Full name
Eduardo Roberto De Lascio
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2008
Supervisor
Committee
Caldas, Ibere Luiz (President)
Cattani, Mauro Sergio Dorsa
Rizzato, Felipe Barbedo
Title in Portuguese
Transporte caótico em plasmas
Keywords in Portuguese
Plasmas
Transporte caótico
Abstract in Portuguese
Este trabalho apresenta um estudo sobre o transporte de partículas através da borda de um plasma confinado em tokamak. É introduzido um modelo, no qual infinitas ondas de deriva estão sobrepostas a um potencial eletrostático de equilíbrio, com campo magnético uniforme, que coloca o problema na forma de mapas. São analisados dois mapas, a saber, o mapa padrão e o mapa padrão não-twist. Resultados numéricos são apresentados para o transporte radial de partículas no mapa padrão. Para o mapa padrão não twist, além da análise do transporte, é realizado um estudo sobre variedades de pontos hiperbólicos e a relação da configuração destas com o transporte, mostrando alteração no transporte de partículas quando ocorre reconexão de variedades.
Title in English
Chaotic transport in plasmas
Keywords in English
Chaos
Plasma physics
Transport
Abstract in English
This work presents a study of the particle transport through the edge of a plasma cofined in a tokamak. A model, with an infinite number of drift waves superposed to an equilibrium electrostatic potential, in addition to an uniform magnetic field, is introduced, what puts the problem in the form of mappings. Two mappings are analysed, viz. the standard map and the standard non-twist map. Numerical results for the radial particle transport in the standard map are presented. For the standard non-twist map besides the transport analysis, a study of the manifolds of hyperbolic points and of the relation of their configuration with the transport is carried out, showing that the particle transport is changed when the manifold reconnection occurs.
 
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dissertacao.pdf (1.56 Mbytes)
Publishing Date
2008-08-26
 
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