internal view

An internal view of the Joint European Torus vessel with a complete metallic wall of beryllium and tungsten at the Culham Center for Fusion Energy in England. So far, the best effort to reach positive energy output from a fusion reactor was achieved by the JET, project, a Tokamak that began operation in 1983. Before it was shut down a decade ago, the device was able to produce 16 megawatts of fusion power while consuming 24 megawatts.