Pegasus Toroidal Experiment
The Pegasus Toroidal Experiment is a plasma confinement experiment relevant to fusion power production, run by the Department of Nuclear Engineering & Engineering Physics of the University of Wisconsin–Madison. It is a spherical tokamak, a very low-aspect-ratio version of the tokamak configuration, i.e.
Source: Wikipedia — Pegasus Toroidal Experiment (CC BY-SA 4.0)