Migration of tungsten eroded from divertor tiles in ASDEX Upgrade

K. Krieger, V. Rohde, R. Schwörer, K. Asmussen, C. García-Rosales, A. Hermann, R. Neu, J. Roth, A. Thoma, M. Weinlich

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Tungsten migration in ASDEX Upgrade was investigated by analysis of deposition on long term sample probes and by erosion and deposition studies using two probe manipulator systems in the midplane and the outer divertor plate respectively. Divertor retention was determined by measuring the total tungsten production in the divertor and comparison with the spectroscopically measured tungsten content in the confined plasma. The fraction of tungsten deposited on limiters in the main chamber compared to deposition in the divertor was determined by injecting tungsten into the main plasma using laser ablation and determining the deposition of these atoms on collector probes. The ratio of inner divertor to outer divertor tungsten deposition was obtained from surface analysis of long term sample probes.

Original languageEnglish
Pages (from-to)734-738
Number of pages5
JournalJournal of Nuclear Materials
StatePublished - 11 Feb 1997
Externally publishedYes


  • ASDEX Upgrade
  • Erosion and particle deposition
  • High Z wall material
  • Impurity transport


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