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Wall cratering upon high velocity normal dust impact

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arxiv 2208.02897 v3 pith:VD5Z7MMH submitted 2022-08-04 physics.plasm-ph cond-mat.mtrl-sci

classification physics.plasm-phcond-mat.mtrl-sci
keywords erosionhighdustimpactimpactsnormaltungstenvelocity
verification ladder T0 review T1 audit T2 compute T3 formal
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Dust-wall high speed impacts, triggered by the termination of runaway electrons on plasma facing components, constitute a source of erosion. Normal high velocity mechanical impacts of tungsten dust on bulk tungsten plates are reproduced in a controlled manner by light gas gun shooting systems. Post-mortem surface analysis revealed that three erosion regimes are realized; plastic deformation, bonding and partial disintegration. The large impact statistics allowed the extraction of reliable empirical damage laws in the latter regime, which can be employed for erosion estimates in future reactors.

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