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Achievement of ion temperatures in excess of 100 million degrees Kelvin in the compact high-field spherical tokamak ST40

S.A.M. McNamara, O. Asunta, J. Bland, P.F. Buxton, C. Colgan, A. Dnestrovskii, M. Gemmell, M. Gryaznevich, D. Hoffman, F. Janky2023年被引用 7Nuclear FusionIF 3出版社

Ion temperatures of over 100 million degrees Kelvin (8.6 keV) have been produced in the ST40 compact high-field spherical tokamak (ST). Ion temperatures in excess of 5 keV have not previously been reached in any ST and have only been obtained in much larger devices with substantially more plasma heating power. The corresponding fusion triple product is calculated to be . These results demonstrate for the first time that ion temperatures relevant for commercial magnetic confinement fusion can be obtained in a compact high-field ST and bode well for fusion power plants based on the high-field ST.

日本語訳

ST40コンパクト高磁場球状トカマク(ST)において、1億ケルビン(8.6 keV)を超えるイオン温度が生成された。5 keVを超えるイオン温度は、これまでいかなるSTでも達成されておらず、はるかに大きな装置で、かなり多くのプラズマ加熱電力によってのみ得られていた。対応する核融合三重積は と計算される。これらの結果は、商業用磁気閉じ込め核融合に適したイオン温度がコンパクトな高磁場STで初めて得られることを示しており、高磁場STに基づく核融合発電所にとって良い前兆となる。

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