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 consumes has been a significant challenge due to the extreme conditions required to sustain the fusion reaction.

Research and development in the field of fusion energy are ongoing around the world, with projects like ITER (International Thermonuclear Experimental Reactor) in France aiming to demonstrate the feasibility of large-scale fusion power. If successful, fusion energy could play a crucial role in addressing future energy needs and combating climate change.

If you have any specific questions or need more information about fusion reactors, feel free to ask!