Answer
The Polywell reactor concept, inspired by Philo T. Farnsworth’s Fusor, is an inertial electrostatic confinement (IEC) device designed for nuclear fusion. It employs multiple sets of nested cusped magnetic fields to confine plasma, aiming to achieve a stable, self-sustaining fusion reaction. The design seeks to overcome the challenges of conventional fusion approaches by simplifying the magnetic field configuration and enabling more efficient plasma heating and confinement.