Artículos de revistas
Tokamak magnetic field lines described by simple maps
Fecha
2008Registro en:
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS, v.165, p.195-210, 2008
1951-6355
10.1140/epjst/e2008-00863-y
Autor
Portela, Jefferson Stafusa Elias
Caldas, Ibere Luiz
Viana, Ricardo Luiz
Institución
Resumen
The magnetic field line structure in a tokamak can be obtained by direct numerical integration of the field line equations. However, this is a lengthy procedure and the analysis of the solution may be very time-consuming. Otherwise we can use simple two-dimensional, area-preserving maps, obtained either by approximations of the magnetic field line equations, or from dynamical considerations. These maps can be quickly iterated, furnishing solutions that mirror the ones obtained from direct numerical integration, and which are useful when long-term studies of field line behavior are necessary (e.g. in diffusion calculations). In this work we focus on a set of simple tokamak maps for which these advantages are specially pronounced.