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Maximising D − T fusion power by optimising the plasma composition and beam choice in JET

D Van Eester, E Lerche, P Huynh, T Johnson, D Yadikin, Ž Štancar, S Aleiferis, D Frigione, L Garzotti, P Lomas2022年Plasma Physics and Controlled FusionIF 2.2出版社

JET has a neutral beam injection as well as a radio frequency (RF) system for bringing plasmas to fusion-relevant temperatures. The former allows D as well as T birth energies of the order of 100–120 keV while the latter has the flexibility to heat a variety of populations by adjusting the antenna frequency. In this paper it is illustrated that—when the JET plasma is heated—the power harvested from D − T fusion reactions favours operating away from the 50–50 D − T balance and that exploiting pure D beams is more beneficial than combined D and T beams as well as pure T beams. Although beam heating dominates the overall behaviour in JET—as much more beam power than wave power can be coupled to the plasma—RF heating allows efficient heating of the very core.

日本語訳

JETは、プラズマを核融合に必要な温度まで加熱するための中性粒子ビーム入射装置と高周波(RF)システムを備えている。前者はDおよびTの生成エネルギーを約100~120 keVにすることができ、後者はアンテナ周波数を調整することで様々な粒子集団を加熱する柔軟性を有する。本論文では、JETプラズマが加熱される際、D–T核融合反応から得られる出力は50–50のD–Tバランスから離れて運転することを有利とし、また純粋なDビームを利用することがDとTの混合ビームや純粋なTビームよりも有益であることを示す。JETではビーム加熱が全体の挙動を支配するものの——プラズマに結合できるビーム出力は波動出力よりもはるかに大きい——RF加熱は最中心部の効率的な加熱を可能にする。

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