Fusion Reactor Is Held Together with Tape

Commonwealth Fusion Systems (CFS), a startup that emerged from research at MIT, is using high-temperature superconducting tape to build its Sparc fusion reactor. This tape, made of yttrium barium copper oxide deposited on a steel substrate, allows for the creation of powerful electromagnets that shape and confine the plasma in the reactor. CFS believes this novel approach will enable the construction of a smaller and cheaper fusion reactor compared to traditional methods. The company has already tested its first reactor magnet and plans to have its Sparc reactor generating fusion power with a net energy gain by early 2026.


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