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Abstract

The magnetic topology and particle drift orbits are analyzed in a monotonic q profile and in a reversed shear TEXTOR equlibrium that is subject to a magnetic perturbation driven by the Dynamic Ergodic Divertor (DED). The main results prove that there xists a transport barrier for the magnetic field lines and for circulating particles in the reversed shear case when the DED is applied. This transport barrier occurs near the surface of minimum q value where the KAM theory may be invalid. Moreover, we have remarked that trapped particles are lost to due to the presence of the ripple and the DED does not affect their trajectories. To analyze the magnetic topology, we use a symplectic perturbed map and the guiding center orbits are evaluated in the Boozer coordinates.

Additional information

Authors: FISCHER O, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Federale de Lausanne (CH);COOPER W A, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Federale de Lausanne (CH);VILLARD L, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Federale de Lausanne (CH)
Bibliographic Reference: Article: Nuclear Fusion, (1999), 1-15
Record Number: 199910866 / Last updated on: 1999-06-25
Category: PUBLICATION
Original language: en
Available languages: en