  A stellarator design is described with the purpose of achieving three goals:
(1) Enhance the confinement time of tritium. (2) Have a sufficient density of
high-Z impurities to radiate the thermal power escaping from the core while
having an extremely low impurity density in the core. (3) Maintain a large
fraction of the plasma in a burning plasma state with a 50/50 deuterium tritium
ratio. Some features of this design could be used in tokamaks. Although having
three confinement zones is natural for stellarators, it is not for tokamaks.
