2. JET – the Joint European Torus
A collective European experiment to investigate
the potential of fusion power
3. JET – the world’s largest tokamak
Used by researchers from more than 40 laboratories
– hosted and operated by Culham Centre for Fusion
Energy in the UK
5. JET’s objectives
JET was designed to study plasma behaviour in
conditions and dimensions approaching those
required in a fusion reactor
6. JET highlights
• The first tokamak to
achieve controlled fusion
power (1991)
• The only device capable
of using Deuterium and
Tritium fuel
• World record of 16
megawatts of fusion
power (1997) – around
65% of power input
• Flexible design that can
be upgraded to keep pace
with scientific progress
7. JET’s specifications
• Plasma volume: 200 cubic
metres
• Plasma radius 3 metres
(major) / 0.9 metres (minor)
• Magnetic field: up to 3.5 Tesla
• Core temperature: up to 200
million degrees C
• Pulse length: up to 60 seconds
• Materials: Inconel (vessel),
beryllium (wall), tungsten
(divertor)
8. Remote Handling
Remote controlled manipulator has allowed many
engineering modifications, including recent
installation of ‘ITER-like’ inner wall
9. JET and ITER
JET has a key role in taking fusion forward, as one
of the main test machines for ITER
10. Future plans
• Deuterium and tritium
‘dress rehearsal’ for
ITER being prepared for
2017, using JET’s unique
tritium capabilities
• Continue as close as
possible to the start of
ITER operations, to
support technical
preparations and train
fusion experts
