Journal Article

PreJuSER-60189

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Non-linear impact of edge localized modes on carbon erosion in the divertor of the JET tokamak

Kreter, A.FZJ* ; Esser, H. G.FZJ* ; Brezinsek, S.FZJ* ; Coad, J. P. ; Kirschner, A.FZJ* ; Fundamenski, W. ; Philipps, V. ; Pitts, R. A. ; Widdowson, A. M.

2009
APS College Park, Md.

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Please use a persistent id in citations: doi:10.1103/PhysRevLett.102.045007

Abstract: The impact of edge localized modes (ELMs) carrying energies of up to 450 kJ on carbon erosion in the JET inner divertor is assessed by means of time resolved measurements using an in situ quartz microbalance diagnostic. The inner target erosion is strongly nonlinearly dependent on the ELM energy: a single 400 kJ ELM produces the same carbon erosion as ten 150 kJ events. The ELM-induced enhanced erosion is attributed to the presence of codeposited carbon-deuterium layers on the inner divertor target, which are thermally decomposed under the impact of ELMs.

Keyword(s): J

Note: This work, supported by the European Communities, was carried out within the framework of the European Fusion Development Agreement. This work was done under the JET-EFDA work programme [9].

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Contributing Institute(s):

1. Plasmaphysik (IEF-4)

Research Program(s):

1. Fusion (P13)

Appears in the scientific report 2009

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