efdajetJET is the world's largest nuclear fusion power experiment and is funded by the European Fusion Development Agreement (EFDA) with the intention of furthering development in power generation through nuclear fusion. Based in Culham, UK, the project commenced in 1983 and is at the absolute cutting edge in terms of scientific development.

The tokomak (that is, the device that is central to the concept of nuclear fusion power generation) has a heating capacity of around 40 Megawatts. In order to achieve power generation through nuclear fusion, plasma temperatures of over 100 million degrees Kelvin are required. This means that it is critical that all components of the tokomak are as perfectly engineered as current technology will allow.