Over 100 million deg. C is needed for the Deuterium-Tritium reaction whilst other reactions require even higher temperatures. Rate It Nuclear Fusion Basics at JET - An introduction to fusion, the fuels used and its principal advantages as a new energy source. In a magnetic field the particles readily spiral along the field lines but diffuse only slowly across them.
JET is the largest Tokamak in the world.
The Science Museum, London, including a feature on fusion. All rights reserved.