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Nuclear fusion: UK JET breakthrough


At a temperature of 150 million degrees Celsius, deuterium and tritium fuse together to form helium and release a tremendous amount of heat energy without any greenhouse contributions.



Tokamak type

8 Feb 2024:

JET produced more energy than input:

69 Megajoules for 5 seconds

1978 JET construction starts

1983 First plasma in JET

1991 First experiments with tritium

1997 High performance full deuterium-tritium experiments. JET achieves world record fusion power of 16.1 MW.

2009 – 10 JET installs a new beryllium/tungsten plasma facing wall to test this configuration for ITER.

2019 – 20 Preparations well advanced for new deuterium-tritium experiments, designed to sustain high fusion performance for longer periods.

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