It seems like you might be referring to a "Fusion Reactor." Fusion reactors are devices that use nuclear fusion to generate heat for producing electricity. Nuclear fusion is a process where atomic nuclei combine to form a heavier nucleus, releasing a large amount of energy in the process. This is the same process that powers the sun and other stars.

Fusion reactors have the potential to provide a clean and virtually limitless source of energy, as they produce minimal waste and use abundant sources of fuel. However, building a practical fusion reactor that can generate more energy than it co