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Stability of a high-β tokamak to uniform vertical displacements

F.A. Haas1975年被引用 34Nuclear FusionIF 3出版社

A simple model of a toroidal, high- β quasi-uniform current model of a tokamak with elliptic cross-section is investigated for stability against uniform vertical displacements. On the basis of asymptotic theory, it is shown that for high- β/toroidal effects to be important β must be of order the equilibrium limit. For a given β and ellipticity the mode can always be stabilized by a conducting wall placed sufficiently close to the plasma. Although the plasma is displaced rigidly the toroidicity leads to both m = 1 and m = 2 harmonics in the perturbed vacuum field.

日本語訳

単純なトカマクモデルを楕円断面に対して考察し、一様な垂直変位に対する安定性を調べた。漸近理論に基づき、高β/トロイダル効果が重要となるためには、βが平衡限界のオーダーでなければならないことが示される。与えられたβと楕円度に対して、このモードは常に、プラズマに十分近接して配置された導体壁によって安定化され得る。プラズマが剛体的に変位する場合でも、トロイダル効果により、摂動された真空磁場にはm = 1およびm = 2の両方の高調波が生じる。

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Vertical displacement
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