The spherical tokamak's reactor geometry underwent an attempted improvement with designs called the "compact tokamak", one of which involved magnets.
One attempt to improve the reactor geometry was attempted by a class of designs known as the "compact tokamak", typified by the Alcator C-Mod (operational since 1991), the Riggatron (conceptual, unbuilt) and IGNITOR (construction in progress as of 2016-02). The later two of these designs dispensed with the first wall and placed the magnets in direct contact with the plasma; in a production design the blanket would be outside the magnets. 
