The Compact Advanced Tokamak (CAT) concept, developed by DIII-D, represents a compact, economical solution for fusion energy leveraging the latest plasma physics simulation codes and advanced technologies such as high-temperature superconductors. Here, visualized is the larger ARIES-AT concept on which it is based. Courtesy General Atomics; tokamak graphic modified from F. Najmabadi et al., Fus. Eng. Des. 80, 3 (2006). US Researchers Design Compact Fusion Power Plant . New concept de...