A numerical study of high-beta stellarator equilibria

Barnes, D. C.; Brackbill, J. U.; Schneider, W.

doi:10.1088/0029-5515/21/5/004

Cited by 2 publications

(1 citation statement)

References 26 publications

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“…In experiments, the current and pressure have diffuse radial profiles, and a difficult theoretical problem is to describe the intrinsically three-dimensional equilibrium. New methods were developed for solving the ideal magnetohydrodynamic equations in three dimensions as an initial-and boundary-value problem [39,40]. The results improved the quantitative agreement between theory and experiment and provided an important method for understanding many of the subtleties associated with stellarator fields.…”

Section: Theorymentioning

confidence: 95%

Theta-pinch research at Los Alamos

McKenna¹,

Siemon²

1985

Nucl. Fusion

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Theta-pinch devices have produced fusion plasmas of high beta, temperature and density, with the first observation of thermonuclear neutrons recorded in 1958. Linear theta-pinch plasmas are neutrally stable and display good confinement properties before the onset of end effects. An end-shortening-induced instability, and axial particle and thermal losses dominate these plasmas. In Scylla IV-P, the plasma stability was enhanced and axial particle losses were eliminated by the use of material end plugs, but thermal losses remained unabated. Scyllac was a large-aspect-ratio, toroidal theta-pinch proposed to circumvent the end-loss problem. The high-betastellarator plasma produced in Scyllac was found to be unstable to a poloidal M 1 mode (sideways displacement). Experiments demonstrated feedback stabilization of the mode. Although experimental lifetimes were too short for transport issues to be addressed, Scyllac did demonstrate the existence of stabilized high-beta stellarator equilibria.

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Section: Theorymentioning

confidence: 95%