[Table of Contents]

Plasma and Fusion Research

Volume 8, 2402029 (2013)

Regular Articles

Configuration Optimization of a Planar-Axis Stellarator with a Reduced Shafranov Shift
Shoichi OKAMURA1,2)
1)
National Institute for Fusion Science, Toki 509-5292, Japan
2)
Department of Fusion Science, The Graduate University of Advanced Studies, Toki 509-5292, Japan
(Received 22 November 2012 / Accepted 12 March 2013 / Published 23 April 2013)

Abstract

Magnetic configurations of LHD experiment are analyzed based on the Fourier modes of the plasma boundary shapes. It was found that a small number of Fourier modes is sufficient to determine the confinement characteristics of different configurations with the magnetic axis shift of LHD. A new configuration is proposed with a different combination of Fourier modes, which has good particle orbits and a favorable property of high beta equilibrium. This solution has a smaller Shafranov shift than the inward-shifted configuration of LHD.

Keywords

stellarator, heliotron, configuration optimization, LHD experiment, Fourier modes, Shafranov shift, boundary shape, planar-axis stellarator

DOI: 10.1585/pfr.8.2402029

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References

  • [1] S. Okamura and Y. Suzuki, Plasma Fusion Res. 6, 2403048 (2011).
  • [2] S. Hirshman et al., Comput. Phys. Commun. 43, 143 (1986).
  • [3] S. Okamura, Contrib. Plasma Phys. 50, 562 (2010).
  • [4] V.V. Nemov and S.V. Kasilov, Phys. Plasma 6, 4622 (1999).
  • [5] S. Okamura, Plasma Phys. Control. Fusion 55, 032002 (2013).

This paper may be cited as follows:

Shoichi OKAMURA, Plasma Fusion Res. 8, 2402029 (2013).