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Performance of the lithium metal infused trenches in the magnum PSI linear plasma simulator

P. Fiflis, T.W. Morgan, S. Brons, G.G. Van Eden, M.A. Van Den Berg, W. Xu, D. Curreli, D.N. Ruzic2015年被引用 22Nuclear FusionIF 3出版社

The application of liquid metal, especially liquid lithium, as a plasma facing component (PFC) has the capacity to offer a strong alternative to solid PFCs by reducing damage concerns and enhancing plasma performance. The liquid-metal infused trenches (LiMIT) concept is a liquid metal divertor alternative which employs thermoelectric current from either plasma or external heating in tandem with the toroidal field to self-propel liquid lithium through a series of trenches. LiMIT was tested in the linear plasma simulator, Magnum PSI, at heat fluxes of up to 3 MW m−2. Results of these experiments, including velocity and temperature measurements, as well as power handling considerations are discussed, focusing on the 80 shots performed at Magnum scanning magnetic fields and heat fluxes up to ~0.3 T and 3 MW m−2. Comparisons to predictions, both analytical and modelled, are made and show good agreement. Concerns over MHD droplet ejection are additionally addressed.

日本語訳

液体金属、特に液体リチウムのプラズマ対向機器(PFC)としての応用は、損傷の懸念を低減し、プラズマ性能を向上させることにより、固体PFCに対する有力な代替手段を提供する可能性を有する。液体金属注入トレンチ(LiMIT)概念は、液体金属ダイバータの代替案であり、プラズマまたは外部加熱のいずれかからの熱電電流をトロイダル磁場と組み合わせて利用し、一連のトレンチを通して液体リチウムを自己推進させる。LiMITは、線形プラズマシミュレータであるMagnum PSIにおいて、最大3 MW m−2の熱流束で試験された。これらの実験の結果(速度および温度測定、ならびにパワー処理に関する考察を含む)について議論する。特に、Magnumで実施された80回のショットに焦点を当て、磁場と熱流束をそれぞれ約0.3 Tおよび3 MW m−2まで走査した。解析的およびモデル化された予測との比較が行われ、良好な一致を示している。MHD液滴放出に関する懸念にもさらに言及する。

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