Tungsten erosion in the all-metal tokamaks JET and ASDEX Upgrade

J. W. Coenen*, G. J. Van Rooij, L. Aho-Mantila, S. Brezinsek, M. Clever, R. Dux, M. Groth, D. Ivanova, K. Krieger, S. Marsen, A. Meigs, H. W. Müller, R. Neu, S. Potzel, M. F. Stamp

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

4 Citations (Scopus)

Abstract

The tungsten source in the all W outer divertor and Be main wall configuration has been quantified mainly during L-mode plasmas and compared to AUG Data both gained from local spectroscopy. Results so far show differences between AUG and JET based on impurities in the plasma changing the sputter behavior. This stresses the need for detailed analysis of the divertor impurity composition and detailed molding in the future analysis. The H-Mode examples indicate at ELM dominated sputtering and a rather low averaged sputtering yield in general. Nitrogen seeding can change the divertor conditions significantly either increasing W sputtering or suppressing it due to local cooling, JET and AUG behave similarly. All together it is clear that by having low divertor temperature or a beneficial impurity composition sputtering can be controlled and is rather low as expected in an all metal environment.

Original languageEnglish
Title of host publication39th EPS Conference on Plasma Physics 2012, EPS 2012 and the 16th International Congress on Plasma Physics
Pages253-256
Number of pages4
Volume1
Publication statusPublished - 2012
MoE publication typeA4 Article in a conference publication
Event39th European Physical Society Conference on Plasma Physics and the 16th International Congress on Plasma Physics - Stockholm, Sweden
Duration: 2 Jul 20126 Jul 2012

Conference

Conference39th European Physical Society Conference on Plasma Physics and the 16th International Congress on Plasma Physics
CountrySweden
CityStockholm
Period02/07/201206/07/2012

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