Surface damage of W exposed to combined stationary D plasma and ELMs-like pulsed plasma

TitleSurface damage of W exposed to combined stationary D plasma and ELMs-like pulsed plasma
Publication TypeJournal Article
Year of Publication2017
AuthorsY.Z Jia, W. Liu, B. Xu, S.L Qu, T.W Morgan
JournalJournal of Nuclear Materials
Volume487
Pagination68-74
Date Published04/2017
Abstract

The surface damage of W under D plasma and ELMs-like transient heat loads was studied by combined stationary and pulsed D plasma. Low-flux transient heat loads will promote blister formation due to the gas expansion inside the blisters. On the contrary, high-flux transient heat loads will mitigate blistering due to the high surface temperature. Therefore, blistering on W surface first increased and then decreased with the increasing transient heat loads. The promotion effect of pulsed plasma on blistering is more obvious on [001] and [110] surfaces than on [111] surface, and the orientation dependence of blisters was mitigated by the transient heat loads. Surface modification induced by transient heat loads only formed on [001] and [110] surfaces, but did not form on [111] surface. The orientation dependence of surface modification was mainly due to the slipping system of dislocations.

DOI10.1016/j.jnucmat.2017.01.044
Division

PSI

Department

PMI

PID0ae13eaa8e5108217c9d0fac5bc52eca
Alternate TitleJ. Nucl. Mater.
LabelOA
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