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FusionBenchmark

JT-60U

also JT-60 Upgrade

JT-60U held the world record for the fusion triple product, and reached a DT-equivalent fusion gain above unity on deuterium plasmas. It was dismantled to make way for JT-60SA.

Operator
JAEA
Type
Fusion device
Approach
Tokamak
Fuel
D-D
Country
JP
Status
Shut down

Results

3.1 × 10²⁰ m⁻³·keV·s Fusion triple product (nTτE) achieved

measured 2001 · shot E39713 · high confidence

21.5 keV Ion temperature achieved

measured 2001 · shot E39713 · peak · high confidence

4.2 × 10¹⁹ m⁻³ Plasma density achieved

measured 2001 · shot E39713 · high confidence

0.344 s Energy confinement time (τE) achieved

measured 2001 · shot E39713 · high confidence

0.185 Equivalent D-T gain (extrapolated) claimed modelled

modelled 2001 · shot E39713 · Modelled D-T fusion power ÷ External heating power coupled into the plasma · high confidence

0.8 Equivalent D-T gain (extrapolated) claimed modelled

modelled 2001 · shot E40259 · sustained · Modelled D-T fusion power ÷ External heating power coupled into the plasma · high confidence

1.5 × 10²¹ m⁻³·keV·s Fusion triple product (nTτE) disputed

measured 1996-08 · medium confidence

5.6 × 10²⁰ m⁻³·keV·s Fusion triple product (nTτE) claimed

measured 1998 · shot E31872 · medium confidence

16.8 keV Ion temperature claimed

measured 1998 · shot E31872 · peak · medium confidence

4.8 × 10¹⁹ m⁻³ Plasma density claimed

measured 1998 · shot E31872 · medium confidence

0.69 s Energy confinement time (τE) claimed

measured 1998 · shot E31872 · medium confidence