Journal Article

FZJ-2015-03945

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Plasma exposure of different tungsten grades with plasma accelerators under ITER-relevant conditions

Makhlaj, V. A. (Corresponding Author) ; Garkusha, I. E. ; Aksenov, N. N. ; Bazylev, B. ; Byrka, O. V. ; Landman, I. ; Linke, J.FZJ* ; Malykhin, S. V. ; Pugachov, A. T. ; Sadowski, M. J. ; Skladnik-Sadowska, E. ; Wirtz, M.FZJ*

2014
IoP Publ. Bristol

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Please use a persistent id in citations: doi:10.1088/0031-8949/2014/T161/014040

Abstract: This paper presents the results of tungsten irradiation experiments performed with three plasma facilities: the QSPA Kh-50 quasi-steady-state plasma accelerator, the PPA pulsed plasma gun and the magneto-plasma compressor. Targets made of different kinds of tungsten (sintered, rolled and deformed) were irradiated with powerful plasma streams at heat fluxes relevant to edge-localized modes in ITER. The irradiated targets were analyzed and two different meshes of cracks were identified. It has been shown that the major cracks do not depend on the tungsten grade. This has been attributed to ductile-to-brittle transition effects. Meshes of inter-granular micro-cracks were detected for energy loads above the melting threshold and these were probably caused by the re-solidification process. The blister-like and cellular-like structures were observed on sample surfaces exposed to helium and hydrogen plasmas.

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Contributing Institute(s):

1. Werkstoffstruktur und -eigenschaften (IEK-2)

Research Program(s):

1. 135 - Plasma-wall interactions (POF2-135) (POF2-135)

Appears in the scientific report 2015

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Database coverage:
Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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