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The scientific results from tokamak confinement systems and the future prospects for fusion are discussed. The aim of such systems is to achieve plasma conditions as close as possible to those required for a reactor based on the deuterium-tritium fusion reaction. The JET tokamak has achieved plasma conditions which in a deuterium-tritium plasma would give a thermonuclear output equal to 20% of the power input to the plasma. With modifications, this is expected to rise to at least 50%. Reactions between non-thermal ions will contribute another 50%, enabling JET to study alpha-particle confinement and heating. International collaboration in this field, already excellent, is expected to grow in the future. The Next European Torus (NET) and ITER proposals are for 20MA plasma current, superconducting coil machines, designed to have an ignited plasma and a high availability for radiation damage and other technological studies. NET is a joint venture in the EEC, while ITER is a collaboration between EEC, USA, USSR and Japan. Both are in the conceptual design phase at present. They are likely to cost several billion dollars and are due to start operation early in the next century.

Additional information

Authors: BICKERTON R J, JET Joint Undertaking, Abingdon, Oxon (GB)
Bibliographic Reference: Report: JET-P(88)49 EN (1988)
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 198910458 / Last updated on: 1994-12-01
Original language: en
Available languages: en
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