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W. A. Cooper, J. M. Antonietti
Centre de Recherches en Physique des Plasmas,
Association Euratom-Confédération Suisse, Ecole Polytechnique Fédérale
de Lausanne, Lausanne, Switzerland
UKAEA Fusion, Culham Science Centre,
UKAEA/Euratom Fusion Association, Abingdon, Oxon, United Kingdom
Abstract. A coreless compact magnetic confinement system that consists of sets
of helical windings and vertical magnetic field coils is investigated. The
helical coils produce a small toroidal translation of the magnetic field lines
and seed paramagnetism. The force-free component of the toroidal current
strongly enhances the paramagnetism such that isodynamic conditions near the
plasma centre can be approached. At 
5%, the configuration is stable
to local MHD modes. Global MHD modes limit the toroidal current 2
J to
about
60kA for peaked J. Bootstrap-like hollow current profiles
generate quasiaxisymmetric systems that require a close fitting conducting
shell to satisfy external kink stability.
IAEA 2001
