Wall damage due to oblique high velocity dust impactsShow others and affiliations
2026 (English)In: Fusion engineering and design, ISSN 0920-3796, E-ISSN 1873-7196, Vol. 225, article id 115675Article in journal (Refereed) Published
Abstract [en]
Runaway electron termination on plasma facing components can trigger material explosions that are accompanied by the expulsion of fast solid debris. Due to the large kinetic energies of the ejected dust particles, their subsequent mechanical impacts on the vessel lead to extensive cratering. Earlier experimental studies of high velocity micrometric tungsten dust collisions with tungsten plates focused exclusively on normal impacts. Here, oblique high velocity tungsten-on-tungsten mechanical impacts are reproduced in a controlled manner by a two-stage light gas gun shooting system. The strong dependence of the crater characteristics and crater morphology on the incident angle is documented. A reliable empirical damage law is extracted for the dependence of the crater depth on the incident angle.
Place, publisher, year, edition, pages
Elsevier BV , 2026. Vol. 225, article id 115675
Keywords [en]
Dust in tokamaks, Light gas guns, Mechanical impacts, Oblique impacts, Runaway electron termination
National Category
Fusion, Plasma and Space Physics Applied Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-379296DOI: 10.1016/j.fusengdes.2026.115675ISI: 001693945400001Scopus ID: 2-s2.0-105034487144OAI: oai:DiVA.org:kth-379296DiVA, id: diva2:2053638
Note
QC 20260417
2026-04-172026-04-172026-04-17Bibliographically approved