Implications of Polarized Deuterium-Tritium Plasmas for Toroidal Fusion Reactors

Spin polarization of the plasma deuterons and tritons in a magnetic fusion reactor can result in an increase in the fusion reactivity and variation of the angular distribution of emission of the fusion neutrons. The increased fusion reactivity relaxes the confinement-temperature conditions for breakeven and ignition. We have determined the effect of varying the angular distribution of the fusion neutrons on the spatial distribution of fusion neutron current and flux at the first wall, on the global tritium breeding ratio, and on the first-wall radiation damage in a low-aspect-ratio toroidal geometry.