Positional Instabilities of a Plasma in a Tokamak with a Magnetic Limiter

概要

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The stability conditions of a plasma with respect to its rigid vertical displacement and horizontal expansion are numerically studied for a tokamak with magnetic limiters. The stability regions are discussed in terms of the decay index n of the equilibrating vertical field at the center of the plasma cross section. The plasma is stable up to n=2.32 for the horizontal expansion even when a magnetic limiter is located in the outer side of the plasma cross section. For the vertical displacement, the plasma is stable even if n=-1.16 when magnetic limiters exist in the upper and lower sides of the plasma cross section. These results indicate that the uniformly displaced plasma is stabilized by the existence of the auxiliary coils, because the current flowing in the coils makes the curvature of the magnetic field lines convex to the plasma.
社団法人応用物理学会の論文
1976-11-05