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Abstract

An analysis of the effect of magnetic geometry on heat flux in a wide range of single null diverted discharge configurations with 1.5<[kappa] 95<2.2, 0.2<[delta] 95<0.45 suggests that elongation is beneficial for confinement. If heat diffusivities are assumed not to depend on plasma shape, the predicted exponent for a power law scaling with elongation is alpha (kappa) approximately equal to 0.74, based on the configurations in the study. This is very close to dependences from the ITER database for discharge conditions, such as ELMy H-modes, obtained from a large number of experiments in various tokamak devices.

Additional information

Authors: WEISEN H, Centre de Recherches en Physique des Plasmas, Association Euratom - Confédération Suisse, École Polytechnique Fédérale de Lausanne (CH);MARTIN Y, Centre de Recherches en Physique des Plasmas, Association Euratom - Confédération Suisse, École Polytechnique Fédérale de Lausanne (CH);MORET J-M, Centre de Recherches en Physique des Plasmas, Association Euratom - Confédération Suisse, École Polytechnique Fédérale de Lausanne (CH)
Bibliographic Reference: A letter published in: Nuclear Fusion, 42, (April 2002), pp.L5-L7
Availability: The full text of the letter is available online at: http://www.iop.org/EJ3-Links/07/d,HogU8Mb3yo+xly2gb4RQ/n204l1.pdf
Record Number: 200215022 / Last updated on: 2002-07-26
Category: PUBLICATION
Original language: en
Available languages: en