PI3

General Fusion's PI-3 is designed to study the plasma physics of a MTF (Magnetized Target Fusion) reactor scale plasma injector. The experiment consists of a large, single-stage Marshall gun which injects a plasma into a region which includes a current carrying center shaft. This results in the creation of a spherical tokamak rather than a spheromak which was studied in PI-2 and PI-1. The reason for moving to the spherical tokamak design is improved thermal confinement and therefore longer energy confinement time.