Commonwealth Fusion Systems Installs Reactor Magnet, Lands Deal With Nvidia

Commonwealth Fusion Systems Installs Reactor Magnet, Lands Deal With Nvidia

CFS Installs First Sparc Magnet—Nvidia Deal Fuels Fusion Push In a major leap toward practical fusion energy, Commonwealth Fusion Systems (CFS) has installed the first of 18 powerful superconducting magnets in its Sparc reactor. Announced at CES 2026, the milestone signals that the long-anticipated demo plant is on track for activation in 2027. Even more significant, CFS revealed a strategic collaboration with Nvidia and Siemens to build a high-fidelity digital twin of the reactor—accelerating testing and troubleshooting before the plasma ever ignites. Credit: Commonwealth Fusion Systems Why This Magnet Matters Fusion reactors like Sparc rely on intense magnetic fields to contain plasma hotter than the sun’s core. The newly installed D-shaped magnet is no ordinary component: it weighs 24 tons and can generate a 20 tesla field—roughly 13 times stronger than a medical MRI. According to CFS CEO Bob Mumgaard, the force is so powerful it could theoretically “lift an aircraft carrier.” These ma…