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Abstract

Results of a systematic optimisation of the current and pressure profiles to maximise the beta-limit of a circular cross-section tokamak are presented. The aspect ratio is kept fixed at 3.7. In most of the study only the n=1 free boundary and ballooning modes are considered with spot checks on low n modes at low q. The surface-averaged current profile is first constrained to be monotonic and to vanish at the edge. The sensitivity of the beta-limit to current reversal within the edge region and to non-vanishing current density at the plasma surface is examined. The first results on the extension of these results to a single-null-divertor quasi-circular cross-section tokamak are presented.

Additional information

Authors: ROY A, Centre de Recherches en Physique de Plasmas, Ecole Polytechnique Fédérale de Lausanne (CH);TROYON F, Centre de Recherches en Physique de Plasmas, Ecole Polytechnique Fédérale de Lausanne (CH)
Bibliographic Reference: Paper presented: Theory of Fusion Plasmas, Chexbres (CH), Oct. 3-7, 1988
Availability: Available from (1) as Paper EN 34236 ORA
Record Number: 198910532 / Last updated on: 1994-12-01
Category: PUBLICATION
Original language: en
Available languages: en
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