A topological approach to the problem of charged particle trajectories in a toroidal axisymmetric configuration
- Association Euratom-CEA, Departement des Recherches sur la Fusion Controlee, Centre d`Etude Cadarache, 13108 Saint-Paul-lez-Durance (France)
This paper proposes a new approach for solving the general problem of Charged Particle Orbits in an axisymmetric toroidal configuration. This method is based upon the guiding center theory and gives a general and ``{ital a} {ital priori}`` classification of the topological properties of the trajectories. For a typical tokamak plasma, fifteen topological classes of orbits and their boundaries in a Constant-Of-Motion-space are found without any trajectory computation. The confinement of these energetic orbits into the plasma region is then discussed. The method remains useful for any arbitrary toroidal axisymmetric configuration, as X-points, doublets, etc., being strictly independent of the equilibrium mathematical form. This new approach may be applied mainly to charged fusion products and runaway electrons produced during disruptions. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.
- OSTI ID:
- 165746
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 10 Vol. 2; ISSN 1070-664X; ISSN PHPAEN
- Country of Publication:
- United States
- Language:
- English
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