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JET

The Joint European Torus — long the largest operating tokamak and a D–T record-holder.

Reference DevicesUpdated 2026-08-11
Type
D–T tokamak
Legacy
Confinement database

JET, the Joint European Torus, was for decades the largest operating tokamak and produced landmark D–T fusion results that helped calibrate confinement scaling. It is a cornerstone of the empirical database.

The scaling laws Kronos designs to draw heavily on machines like JET.

Common questions

What was JET's significance?

The Joint European Torus held records for fusion power from D–T plasmas and validated much of the confinement physics later machines rely on. It is a cornerstone of the empirical database.

Why does Kronos reference it?

Because JET's D–T results are part of the experimental basis for the standard confinement scaling Kronos designs to, rather than optimistic extrapolation.

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Content reviewed August 2026 · design-and-simulation stage