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Fast plasma dilution in ITER with pure deuterium shattered pellet injection

E. Nardon, D. Hu, M. Hoelzl, D. Bonfiglio, the JOREK team2020年被引用 23Nuclear FusionIF 3出版社

JOREK 3D non-linear magnetohydrodynamic (MHD) simulations of pure deuterium shattered pellet injection in ITER are presented. Considering a 15 MA L-mode plasma with a thermal energy content of 36 MJ from the non-activated phase of ITER operation, it is shown that such a scheme could allow diluting the plasma by more than a factor 10 without immediately triggering large MHD activity, provided the background impurity density is low enough. This appears as a promising strategy to reduce the risk of hot tail runaway electron (RE) generation and possibly to avoid RE beams altogether in ITER, motivating further studies in this direction.

日本語訳

ITERにおける純重水素破砕ペレット入射のJOREK 3D非線形磁気流体力学(MHD)シミュレーションを提示する。ITER運転の非活性化段階からの熱エネルギー含有量36 MJのLモードプラズマ(電流15 MA)を考慮すると、この方式により、背景不純物密度が十分に低い場合には、大きなMHD活動を直ちに誘発することなく、プラズマを10倍以上希釈できる可能性があることが示される。これは、高温逃走電子(RE)生成のリスクを低減し、場合によってはREビームを完全に回避するための有望な戦略として見え、ITERにおけるこの方向のさらなる研究を動機づけるものである。

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ITERFusion Advanced Studies TorusDeuteriumPellet injectionShattered pellet injection
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