Magnetic confinement fusion : Recent results at JET and plans for the futureFunded under: FP2-FUSION 10C
The JET tokamak experiment has approached the plasma conditions needed in a thermonuclear reactor based on magnetic confinement concepts. In single deuterium discharges, breakeven has been achieved and, for the first time with deuterium-tritium fuels, up to 1.7 MW of fusion power was achieved in a 2 s pulse. The total energy release was 2 MJ. These results were obtained transiently, limited by a high impurity influx. For long pulse high power operation, plasma dilution has been identified as a major threat to a reactor. Improved impurity control in the pumped divertor configuration in a new phase of JET (1992-1996) is envisaged. Experimental results support a plasma model based on a single phenomenon and MHD limits. Together, these are used to define the size and operating conditions of a reactor. A Next Step device would demonstrate the scientific feasibility of ignition under reactor conditions and this is discussed within the context of an international collaborative programme.
Bibliographic Reference: Report: JET-P(92)21 EN (1992) 5 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199211052 / Last updated on: 1994-12-02
Original language: en
Available languages: en