Edge-localized-mode Suppression Through Density-Profile Modification with Lithium-Wall Coatings in the National Spherical Torus Experiment.
Physical review letters(2009)
摘要
Reduction or elimination of edge localized modes (ELMs) while maintaining high confinement is essential for future fusion devices, e.g., the ITER. An ELM-free regime was recently obtained in the National Spherical Torus Experiment, following lithium (Li) evaporation onto the plasma-facing components. Edge stability calculations indicate that the pre-Li discharges were unstable to low-n peeling or ballooning modes, while broader pressure profiles stabilized the post-Li discharges. Normalized energy confinement increased by 50% post Li, with no sign of ELMs up to the global stability limit.
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关键词
Edge Localized Modes,Molecular Dynamics Simulations,MHD Stability,High Energy Density Physics,irradiation-resistant steels
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