Thermal shock behaviour of tungsten after high flux H-plasma loading

TitleThermal shock behaviour of tungsten after high flux H-plasma loading
Publication TypeJournal Article
Year of Publication2013
AuthorsM. Wirtz, J. Linke, G. Pintsuk, G. De Temmerman, G.M Wright
JournalJournal of Nuclear Materials
Volume443
Number1-3
Pagination497-501
Abstract

Previous studies have shown that transient thermal shock loads induce crack networks on tungsten samples especially at low base temperatures. To achieve test conditions which are more relevant for the performance of tungsten-armoured plasma facing components in next step thermonuclear fusion devices tungsten tiles were exposed to high flux hydrogen-plasma in the linear plasma generator Pilot-PSI and the high heat flux ion beam test facility MARION. Subsequently, the cyclic transient heat load tests were done in the electron beam facility JUDITH 1. The induced damages after these combined tests were examined by microscopically means, profilometry and metallography. The comparison of the obtained results and damage characteristics with those obtained after thermal shock loading show that the preloading of tungsten targets with high flux hydrogen-plasma has significant influence on the thermal shock behaviour of tungsten in terms of crack distance, width, and depth as well as cracked area. Furthermore the plasma parameters, in particular pulse duration and sample temperature during loading, have strong impact on the damage pattern after thermal shock loading. © 2013 Elsevier B.V. All rights reserved.

URLhttp://www.sciencedirect.com/science/article/pii/S002231151300977X
DOI10.1016/j.jnucmat.2013.08.002
Division

PSI

Department

PSI-E

PID

7cee956963f3330cb1e5d213f8a862d7

Alternate TitleJ. Nucl. Mater.

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