Journal Article

FZJ-2017-07928

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Ageing of structural materials in tokamaks: TEXTOR liner study

Weckmann, A. (Corresponding author) ; Petersson, P. ; Rubel, M. ; Fortuna-Zaleśna, E. ; Zielinski, W. ; Romelczyk-Baishya, B. ; Grigore, E. ; Ruset, C. ; Kreter, A.FZJ*

2017
IoP Publ. Bristol

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Please use a persistent id in citations: doi:10.1088/1402-4896/aa8bee

Abstract: After the final shut-down of the tokamak TEXTOR, all of its machine parts became accessible for comprehensive studies. This unique opportunity enabled the study of the Inconel 625 liner by a wide range of methods. The aim was to evaluate eventual alteration of surface and bulk characteristics from recessed wall elements that may influence the machine performance. The surface was covered with stratified layers consisting mainly of boron, carbon, oxygen, and in some cases also silicon. Wall conditioning and limiter materials hence predominantly define deposition on the liner. Deposited layers on recessed wall elements reach micrometre thickness within decades, peel off and may contribute to the dust inventory in tokamaks. Deuterium content was about 4,7 at% on average most probably due to wall conditioning with deuterated gas, and very low concentration in the Inconel substrate. Inconel 625 retained its mechanical strength despite 26 years of cyclic heating, stresses and particle bombardment.

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Contributing Institute(s):

1. Plasmaphysik (IEK-4)

Research Program(s):

1. 174 - Plasma-Wall-Interaction (POF3-174) (POF3-174)

Appears in the scientific report 2017

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

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