  Tokamaks and stellarators are the leading two magnetic confinement devices
for producing fusion energy, begging the question of whether the strengths of
the two could be merged into a single concept. To meet this challenge, we
propose a first-of-its kind optimized stellarator-tokamak hybrid. Compared to a
typical tokamak coil set, only a single simple type of stellarator coil has to
be added which leads to a compact, volume- and transport-preserving magnetic
field, with an added rotational transform that reaches levels thought to
enhance stability.
