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Measurements of the parameter dependencies of the bootstrap current in the W7-X stellarator

U. Neuner, K. Rahbarnia, C.D. Beidler, A. Dinklage, Y. Turkin, T. Stange, T. Andreeva, J. Schilling, H. Thomsen, M. Beurskens2021年被引用 14Nuclear FusionIF 3出版社

Intrinsic, diffusion-driven toroidal (bootstrap) currents between −7 and 17 kA were measured in the optimised stellarator Wendelstein 7-X (W7-X) for several magnetic configurations at line-integrated plasma densities between 2 × 1019 and 1.6 × 1020 m−2 and heating powers between 0.5 and 6 MW. The sign of the bootstrap current changes with field reversal, and its magnitude decreases with the mirror term and the rotational transform of the magnetic configuration as well as the line-integrated plasma density, and increases with the heating power. Both the absolute values and the dependencies agree with neoclassical calculations within their respective uncertainties, confirming the neoclassical optimisation of W7-X for small bootstrap currents.

日本語訳

最適化されたステラレーターWendelstein 7-X(W7-X)において、複数の磁気配位について、線積分プラズマ密度が2×10¹⁹から1.6×10²⁰ m⁻²、加熱パワーが0.5から6 MWの範囲で、固有の拡散駆動トロイダル(ブートストラップ)電流が−7から17 kAの範囲で測定された。ブートストラップ電流の符号は磁場反転に伴って変化し、その大きさは磁気配位のミラー項および回転変換、ならびに線積分プラズマ密度とともに減少し、加熱パワーとともに増加する。絶対値と依存性の両方が、それぞれの不確実性の範囲内で新古典計算と一致しており、W7-Xにおける小さなブートストラップ電流に対する新古典的最適化が確認された。

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wendelstein-7x高精度(タイトル一致)

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StellaratorW7-XBootstrap current
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