Low Radioactivity Fusion Reactor Based on the Spherical Tokamak with a Strong Magnetic Field

The most important feature of the spherical tokamak is the possibility of high-β plasma confinement (β is the ratio of plasma pressure to magnetic field pressure). So, spherical tokamak can be considered as a possible confinement system for D–³He fusion reactor. Present paper study the ability to develop powerful D–³He reactor based on a spherical tokamak (fusion power about 3 GW). The following parameters are considered as optimization criteria: (1) the ratio of confinement time to the value predicted by ITER98y2 scaling; (2) the neutron flux from the plasma.