The reactor under construction at Commonwealth Fusion Systems in Devens, Mass., is one of at least 43 private-industry ...

The powerful magnets then confine and shape the plasma, keeping it from touching the reactor’s walls. The plasma is then heated to an incredible 150 million degrees Celsius , ten times hotter ...

The newly completed magnet system isn’t going to work alone. The Central Solenoid joins six massive ring-shaped Poloidal Field magnets built and delivered from Europe, China, and Russia, forming ...