Specific Features of Mechanism for Dust Production from Tungsten Armor Under Action of ELMs
FUSION SCIENCE AND TECHNOLOGY(2014)
摘要
Analysis of comprehensive investigations of divertor armor erosion under action of edge-localized modes (ELMs) using the PEGASUS-3D code has been performed. Different erosion mechanisms for tungsten (W) and carbon fiber composite (CFC) armor materials have been revealed. This difference explains almost 3 orders of magnitude difference in the erosion rates of CFC and W. Investigation of the crack pattern evolution under repetitive ELM-like surface heat load has been done. Special treatment for tungsten armor tiles has been proposed for reduction of dust production rate in ITER operation regime.
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关键词
plasma-facing materials,tungsten,brittle destruction
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