Stellarators with Permanent Magnets
P. Helander, M. Drevlak, M. C. Zarnstorff, S. C. Cowley
Abstract
It is shown that the magnetic-field coils of a stellarator can, at least in principle, be substantially simplified by the use of permanent magnets. Such magnets cannot create toroidal magnetic flux, but they can be used to shape the plasma and thus to create poloidal flux and rotational transform, thereby easing the requirements on the magnetic-field coils. As an example, a quasiaxisymmetric stellarator configuration is constructed with only 8 circular coils (all identical) and permanent magnets.
Topics & Concepts
StellaratorMagnetToroidMagnetic fluxMagnetic fieldFlux (metallurgy)PhysicsNuclear magnetic resonanceForce between magnetsPlasmaCondensed matter physicsMagnetic energyMaterials scienceNuclear physicsMagnetizationQuantum mechanicsMetallurgyMagnetic confinement fusion researchSolar and Space Plasma DynamicsSuperconducting Materials and Applications