Bootstrap Current and Quasi-Symmetry in Reactor-Size Stellarators

The impact of the bootstrap current (BC) has become an important issue in the modeling of quasi-symmetric stellarator devices. Magnetohydrodynamic equilibria have been calculated with self-consistent BC in the collisionless 1/ε regime for characteristic quasi-symmetric configurations: a three-period...

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Bibliographic Details
Published in:Fusion science and technology 2004-07, Vol.46 (1), p.44-53, Article 44
Main Authors: Margalet, Sergi Ferrando I, Cooper, Wilfred Anthony, Allfrey, Simon J., Popovitch, Pavel, Isaev, Maxim Yu
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AXIAL SYMMETRY
BOOTSTRAP CURRENT
COMPUTERIZED SIMULATION
EQUILIBRIUM
PLASMA SIMULATION
STELLARATORS
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Summary:The impact of the bootstrap current (BC) has become an important issue in the modeling of quasi-symmetric stellarator devices. Magnetohydrodynamic equilibria have been calculated with self-consistent BC in the collisionless 1/ε regime for characteristic quasi-symmetric configurations: a three-period quasi-axisymmetric and a four-period quasi-helically symmetric stellarator. The relationship between magnetic geometry and BC is shown along with its effect on the equilibrium when β is increased. The relevance of the nonsymmetric modes is also investigated for both configurations. In each case, the effect on stability has been studied.
ISSN:1536-1055
1943-7641
DOI:10.13182/FST04-A539