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Evidence for high-velocity solid dust generation induced by runaway electron impact in FTU

De Angeli M.; Tolias P.; Ratynskaia S.; Ripamonti D.; Vignitchouk L.; Causa F.; Daminelli G.; Esposito B.; Fortuna-Zalesna E.; Ghezzi F.; Laguardia L.; Maddaluno G.; Riva G.; Zielinski W.

Post-mortem and in situ evidence is presented in favor of the generation of high-velocity solid dust during the explosion-like interaction of runaway electrons with metallic plasma-facing components in FTU. The freshly-produced solid dust is the source of secondary de-localized wall damage through high-velocity impacts that lead to the formation of craters, which have been reproduced in dedicated light gas gun impact tests. This novel mechanism, of potential importance for ITER and DEMO, is further supported by surface analysis, multiple theoretical arguments and dust dynamics modeling.

ID 474209
DOI 10.1088/1741-4326/ac8a04
PRODUCT TYPE Journal Article
LAST UPDATE 2023-07-04T18:09:21Z
TITLE Implementation of activities described in the Roadmap to Fusion during Horizon 2020 through a Joint programme of the members of the EUROfusion consortium