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Abstract

Neoclassical transport and alpha particle confinement are analysed for three 3-D reactor designs - the QAS3, the ST/sphellamak hybrid and the sphellamak - using the VENUS code. It is observed that neither the QAS3 nor the ST/sphellamak is truly a quasi-axisymmetric configuration. Thus the transport is governed by the helical deformation of the magnetic field strength, and these configurations do not effectively confine the trapped alpha particles. On the other hand, the sphellamak is a nearly isodynamic structure in the plasma core, which leads to almost perfect alpha confinement, and the neoclassical transport is very similar to that obtained in a 2-D equivalent tokamak.

Additional information

Authors: FISCHER O, Centre de Recherches en Physique des Plasmas, Association Euratom-Confédération Suisse, Ecole Polytechnique Fédérale de Lausanne (CH);COOPER W A, Centre de Recherches en Physique des Plasmas, Association Euratom-Confédération Suisse, Ecole Polytechnique Fédérale de Lausanne (CH);VILLARD L, Centre de Recherches en Physique des Plasmas, Association Euratom-Confédération Suisse, Ecole Polytechnique Fédérale de Lausanne (CH);ISAEV M Yu, Nuclear Fusion Institute, Russian Research Centre, Kurchatov Institute, Moscow (RU)
Bibliographic Reference: An article published in: Nuclear Fusion 42 (July 2002) pp.817-826
Availability: Available free of charge from: École Polytechnique Fédérale de Lausanne (EPFL), Ecublens, CH-1015 Lausanne Fax +41-21-6934747
Record Number: 200215670 / Last updated on: 2002-12-16
Category: PUBLICATION
Original language: en
Available languages: en
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