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Abstract

Key physics issues in the design of a high ß quasi-axisymmetric stellarator configuration are discussed. The goal of the design study is a compact stellarator configuration with aspect ratio comparable to that of tokamaks and good transport and stability properties. Quasi-axisymmetry has been used to provide good drift trajectories. Ballooning stability has been produced by strong axisymmetric shaping. A combination of externally generated shear and nonaxisymmetric corrugation of the plasma boundary provides stability to external kink modes even in the absence of a conducting wall. The resulting configuration is also found to be robustly stable to vertical modes, increasing the freedom to do axisymmetric shaping.

Additional information

Authors: CENTRE DE RECHERCHES EN PHYSIQUE DES PLASMAS, ;ECOLE POLYTECHNIQUE FEDERALE, ;LAUSANNE (CH),
Bibliographic Reference: Article: 26th EPS Conference on Controlled Fusion and Plasma Physics, (1999)
Record Number: 199911087 / Last updated on: 1999-08-06
Category: PUBLICATION
Original language: en
Available languages: en