Marginal stability diagrams for infinite-n ballooning modes in quasi-symmetric stellarators

S. R. Hudson; C. C. Hegna; R. Torasso; A. Ware

doi:10.1088/0741-3335/46/5/009

Marginal stability diagrams for infinite-n ballooning modes in quasi-symmetric stellarators

S. R. Hudson, C. C. Hegna, R. Torasso, A. Ware

Physics and Astronomy

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7 Scopus citations

Abstract

The influence of the pressure and rotational transform gradients on the local shear, which in turn influences the ballooning stability, is described. Stability diagram for the quasi-axially symmetric NCSX, a quasi-poloidally symmetric configuration and the quasi-helically symmetric HSX are compared. Regions of stability are observed in both NCSX and the quasi-helically symmetric device. The results show that the ballooning stability results when the local shear is small in regions of bad curvature with sufficient pressure gradient.

Original language	English
Pages (from-to)	869-876
Number of pages	8
Journal	Plasma Physics and Controlled Fusion
Volume	46
Issue number	5
DOIs	https://doi.org/10.1088/0741-3335/46/5/009
State	Published - May 2004

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title = "Marginal stability diagrams for infinite-n ballooning modes in quasi-symmetric stellarators",

abstract = "The influence of the pressure and rotational transform gradients on the local shear, which in turn influences the ballooning stability, is described. Stability diagram for the quasi-axially symmetric NCSX, a quasi-poloidally symmetric configuration and the quasi-helically symmetric HSX are compared. Regions of stability are observed in both NCSX and the quasi-helically symmetric device. The results show that the ballooning stability results when the local shear is small in regions of bad curvature with sufficient pressure gradient.",

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AU - Hudson, S. R.

AU - Hegna, C. C.

AU - Torasso, R.

AU - Ware, A.

PY - 2004/5

Y1 - 2004/5

N2 - The influence of the pressure and rotational transform gradients on the local shear, which in turn influences the ballooning stability, is described. Stability diagram for the quasi-axially symmetric NCSX, a quasi-poloidally symmetric configuration and the quasi-helically symmetric HSX are compared. Regions of stability are observed in both NCSX and the quasi-helically symmetric device. The results show that the ballooning stability results when the local shear is small in regions of bad curvature with sufficient pressure gradient.

AB - The influence of the pressure and rotational transform gradients on the local shear, which in turn influences the ballooning stability, is described. Stability diagram for the quasi-axially symmetric NCSX, a quasi-poloidally symmetric configuration and the quasi-helically symmetric HSX are compared. Regions of stability are observed in both NCSX and the quasi-helically symmetric device. The results show that the ballooning stability results when the local shear is small in regions of bad curvature with sufficient pressure gradient.

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IS - 5

ER -

Marginal stability diagrams for infinite-n ballooning modes in quasi-symmetric stellarators

Abstract

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