About the site from the wiki. The Culham Centre for Fusion Energy (CCFE) is the UK's national laboratory for fusion research. It is located at the Culham Science Centre, near Culham, Oxfordshire, and is the site of the Joint European Torus (JET), Mega Ampere Spherical Tokamak (MAST) and the now closed Small Tight Aspect Ratio Tokamak (START). Formerly known as UKAEA Culham, the laboratory was renamed in October 2009 as part of organisational changes at its parent body, the Un