Energy · 1983

Joint European Torus

Europe's giant tokamak sets fusion energy records for 40 years.

JET at Culham, England first ran in 1983, produced the first controlled D-T fusion power in 1991, and reached 16 MW in 1997. In its final campaign in 2023 it released a record 69 MJ in one pulse before closing.

See it in the living tree Wikipedia

Arcs above join it to what it stood on, arcs below to what it led to. The bar places this stretch on the tree's whole timeline.

What it built on 1

Tokamak 1958

What it led to 1

Commercial fusion electricity ~2045

Related measurements

The dashed line marks when it first worked.

Record fusion triple product Latest: 1.73×10²² keV·s/m³ (2017) Source: Wurzel & Hsu 2022, Physics of Plasmas 29, 062103; Wurzel & Hsu 2025 update, Physics of Plasmas 32, 112106

Nuclear electricity generation Latest: 2.81k TWh (2025) Source: Our World in Data