Exploring the database of omnigenous stellarators with DESC

Stellarators are toroidal nuclear fusion devices that use a 3D magnetic field to confine a hot plasma. Unlike tokamaks, their toroidally axisymmetric counterparts, stellarators lack toroidal symmetry. The lack of symmetry allows us to explore millions of possible equilibria but does not guarantee omnigenity, a crucial property that ensures radial confinement of plasma. Therefore, finding omnigenous stellarator equilibria becomes an optimization problem.

Based on work by Dudt et al., we present a database of different omnigenous equilibria generated with the DESC MHD equilibrium optimizer in this poster. Since omnigenity is the superset of quasisymmetry, a favorable hidden symmetry of stellarators allows us to explore a much larger space of possible stellarator equilibria. We present some of the novel and interesting omnigenous equilibria in this poster.