Current state of research into magnetic fusion using tokamaks
The tokamak is by far the most promising system available for magnetic confinement. The large scale stability of the plasma is kept well under control, and this factor determines the limits of operation in terms of pressure and current in the plasma ring. The understanding of confinement is empirical, but only slight extrapolation is now needed to predict that thermonuclear ignition should be possible in a plasma ring of about 1,000 m3. Techniques already exist to heat the plasma to the required temperature of 20 keV. A coherent concept of the plasma-wall interaction is beginning to emerge. It will be necessary to achieve a flow of cold, dense plasma in the proximity of material coming into contact with the plasma. This will control problems of erosion, improve the effectiveness of pumping, and possibly stem the influx of impurities. Major achievements are expected in the next few years.
Bibliographic Reference: Paper presented: Troisième Congrès de la Société Française de Physique - Plasma, Nancy (FR), September 16-18, 1992
Availability: Available from (1) as Paper FR 37073 ORA
Record Number: 199211487 / Last updated on: 1994-11-29
Original language: fr
Available languages: fr