A compact reversed shear tokamak reactor sustained by beam driven currents

A concept of cost competitive fusion reactor (CREST-1), based on a beam generated reversed shear equilibrium, is described. The driver optimization study shows that an NBI system with assistance of an RF system results in high flexibility in the operation, while the fully beam driven operation (without RF) is also possible. The flexibility in the operation parameters makes a partial load operation possible, which will be an important feature as a commercial reactor.