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Relation of vertical stability and aspect ratio in tokamaks

R.D. Stambaugh, L.L. Lao, E.A. Lazarus1992年被引用 30Nuclear FusionIF 3出版社

It is evaluated how the upper limit to plasma elongation kappa , caused by vertical stability, varies with the ratio A=R/a of the tokamak. Equilibria were generated with EFITD and the vertical stability was assessed by GATO. For a 'generic' tokamak with a superconducting wall conformal to the plasma shape and a distance 0.5 a away from the plasma edge and a constant current profile (q0=1.0, li ≃ 1.0, q95 = 3.2) it is found that the maximum stable kappa decreased only slowly from 2.65 at A = 2.0 to 2.4 at A=6.0. To first order, a reasonable assumption in tradeoff studies of new machine designs is no dependence of κmax on A

日本語訳

プラズマ伸長度κの上限が、鉛直安定性によって引き起こされるが、トカマクの比A=R/aとともにどのように変化するかを評価した。平衡はEFITDを用いて生成され、鉛直安定性はGATOによって評価された。プラズマ形状に共形で、プラズマ端から0.5 aの距離にある超伝導壁と、一定の電流分布(q0=1.0、li≃1.0、q95=3.2)を持つ「一般的な」トカマクについて、最大安定κはA=2.0での2.65からA=6.0での2.4へと緩やかにのみ減少することが見出された。一次近似として、新しい装置設計のトレードオフ研究における合理的な仮定は、κmaxのAに対する非依存性である。

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