At CES 2026 on Tuesday, Commonwealth Fusion Systems (CFS) revealed a major milestone in nuclear fusion energy.
The company has installed the first of 18 powerful magnets in its Sparc fusion reactor, a demonstration device it hopes to activate next year.
Fusion, long promised but delayed for decades, may finally be approaching practical reality. If successful, Sparc could release more energy than it consumes, producing nearly limitless clean power.
The newly installed D-shaped magnet is the first of 18 that will form a doughnut-like structure to confine and compress plasma. Each magnet weighs about 24 tons and can generate a 20-tesla magnetic field, roughly 13 times stronger than a standard MRI machine.
“It’s the type of magnet that you could use to, like, lift an aircraft carrier,” said Bob Mumgaard, CFS’ co-founder and CEO.
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