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In the last two decades tokamak conceptual reactor design studies have benefitted from progressing plasma physics experiments, more depth in theory and increasing detail in technology and engineering. Recent full-scale reactor extrapolations such as the US ARIES-I and the EC Reference Reactor study provide information on the advanced concepts that are required when economic boundary conditions are imposed. The ITER international reactor design activity has concentrated on defining the next step after the JET generation of experiments. For steady-state operation, as required for any future commercial tokamak fusion power plants, it is essential to have non-inductive current drive. The current drive power and other internal power requirements specific to magnetic confinement fusion have to be kept as low as possible, in order to attain a competitive overall power conversion efficiency. A high plasma Q is primarily dependent on a high current drive efficiency. Since such conditions have not yet been attained in practice, the present situation and the further development required are characterised. Such development and an appropriately designed Next Step tokamak reactor make the gradual realisation of high-Q operation appear feasible.

Additional information

Authors: KNOBLOCH A F, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE)
Bibliographic Reference: Report: IPP 4/246 EN (1991) 44 pp.
Availability: Available from Max-Planck-Institut für Plasmaphysik, 8046 Garching bei München (DE)
Record Number: 199111297 / Last updated on: 1994-12-02
Original language: en
Available languages: en