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Internal transport barrier formation induced by edge perturbation on LHD

S. Inagaki, N. Tamura, K. Ida, S. Kubo, T. Shimozuma, Y. Nagayama, K. Kawahata, S. Sudo, A. Fujisawa, K. Itoh2010年被引用 3Nuclear FusionIF 3出版社

The electron internal transport barrier (ITB) is formed by an edge perturbation induced by a tracer encapsulated solid pellet injection in a net-current free LHD plasma. The ITB trigger by an edge perturbation takes place in the low density regime and the ITB is not accompanied by a significant change in the density. At the onset of the core temperature rise, there is a strong correlation between the heat flux in the central region and the temperature gradient at a distance half of the plasma radius away. A radial temperature profile with a concave curvature abruptly appears in the growing phase of temperature gradient. Turbulence suppression mechanisms via flow and magnetic shears are not sufficient to explain these features.

日本語訳

内部輸送障壁(ITB)は、正味電流のないLHDプラズマへのトレーサー固体ペレット入射によって誘起された周辺部摂動により形成される。周辺部摂動によるITBのトリガーは低密度領域で発生し、ITBは密度の顕著な変化を伴わない。コア温度上昇の開始時には、中心領域の熱流束と、プラズマ半径の半分の距離における温度勾配との間に強い相関が見られる。凹曲率を有する径方向温度分布は、温度勾配の成長段階において急激に現れる。流れのシアおよび磁気シアによる乱流抑制機構だけでは、これらの特徴を説明するには不十分である。

装置

lhd高精度(タイトル一致)

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Transport barrierLHDInternal transport barrier
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