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Title: Demonstrating electromagnetic control of free-surface, liquid-metal flows relevant to fusion reactors
Contributors: Hvasta, M. G.
Kolemen, E.
Fisher, A. E.
Ji, H.
U. S. Department of Energy contract number DE-AC02-09CH11466
Keywords: Electromagnetic Control
Plasma-Facing Component
Issue Date: Jan-2018
Publisher: Princeton Plasma Physics Laboratory, Princeton University
Related Publication: Nuclear Fusion, 58 (2018) 016022
Abstract: Plasma-facing components (PFC's) made from solid materials may not be able to withstand the large heat and particle fluxes that will be produced within next-generation fusion reactors. To address the shortcomings of solid PFC's, a variety of liquid-metal (LM) PFC concepts have been proposed. Many of the suggested LM-PFC designs rely on electromagnetic restraint (Lorentz force) to keep free-surface, liquid-metal flows adhered to the interior surfaces of a fusion reactor. However, there is very little, if any, experimental data demonstrating that free-surface, LM-PFC's can actually be electromagnetically controlled. Therefore, in this study, electrical currents were injected into a free-surface liquid-metal that was flowing through a uniform magnetic field. The resultant Lorentz force generated within the liquid-metal affected the velocity and depth of the flow in a controllable manner that closely matched theoretical predictions. These results show the promise of electromagnetic control for LM-PFC's and suggest that electromagnetic control could be further developed to adjust liquid-metal nozzle output, prevent splashing within a tokamak, and alter heat transfer properties for a wide-range of liquid-metal systems.
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Appears in Collections:Plasma Science & Technology

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