JET results and the prospects for fusion
Recent experiments on JET with increased additional power have resulted in plasma parameters close to those of a thermonuclear reactor. Electron and ion temperature significantly in excess of 10keV have been simultaneously achieved at a plasma density of 2 x 1.0 E19/m3; transiently, during an H-mode, the fusion product has reached 3 x 1.0 E20/m3.keV.s at temperatures exceeding 5keV; and plasma current up to 7MA has been achieved. Degradation of confinement with increased power is observed in all regimes. The major heat and particle transport phenomena observed in Tokamaks can be interpreted as resulting from a magnetic turbulence. In some respects this is analogous to the turbulence existing in fluids when the fluid velocity exceeds a certain threshold value. To tackle the problems of a controlled burning plasma in semi-continuous operation for at least several days, the plasma of the next step tokamak should be similar in size and performance to an energy producing reactor. The main characteristics of the design of a thermonuclear furnace dedicated to this objective are presented. The plasma parameters are scaled up from JET by a linear factor of 2.5. Magnets, either superconducting or of copper, should be able to operate continuously.
Bibliographic Reference: Report: JET-P(88)58 EN (1988)
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 198910459 / Last updated on: 1994-12-01
Original language: en
Available languages: en