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Critical β of a D-shaped toroidal plasma with sharp boundary

1981; AIP Publishing; Volume: 24; Issue: 6 Linguagem: Inglês

10.1063/1.863503

2163-4998

Masafumi Kito,

Plasma Diagnostics and Applications

Under the cap-cyclide coordinate system, the marginal stability of a sharp boundary toroidal plasma whose cross section is D shaped is examined using the energy principle. The analytical results are valid for arbitrary β, arbitrary aspect ratio, and arbitrary elongation of the plasma. There exists a maximum elongation for a given aspect ratio. The critical beta βc is computed for several aspect ratios and elongations. For given aspect ratio, βc increases as long as the elongation increases.