Investigation of probe surfaces after ion cyclotron wall conditioning in ASDEX upgrade

A. Garcia-Carrasco, P. Petersson, T. Schwarz-Selinger, T. Wauters, D. Douai, V. Bobkov, R. Cavazzana, K. Krieger, A. Lyssoivan, S. Möller, M. Spolaore, V. Rohde, M. Rubel

Research output: Contribution to journalArticle

Abstract

For the first time, material analysis techniques have been applied to study the effect of ion cyclotron wall conditioning (ICWC) on probe surfaces in a metal-wall machine. ICWC is a technique envisaged to contribute to the removal of fuel and impurities from the first wall of ITER. The objective of this work was to assess impurity migration under ICWC operation. Tungsten probes were exposed in ASDEX Upgrade to discharges in helium. After wall conditioning, the probes were covered with a co-deposited layer containing D, B, C, N, O and relatively high amount of He. The concentration ratio He/C+B was 0.7. The formation of the co-deposited layer indicates that a fraction of the impurities desorbed from the wall under ICWC operation are transported by plasma and deposited away from their original location.
Original languageEnglish
Pages (from-to)733 - 735
Number of pages3
JournalNuclear Materials and Energy
Volume12
DOIs
Publication statusPublished - 1 Aug 2017
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science (miscellaneous)
  • Nuclear Energy and Engineering

Cite this

Garcia-Carrasco, A., Petersson, P., Schwarz-Selinger, T., Wauters, T., Douai, D., Bobkov, V., ... Rubel, M. (2017). Investigation of probe surfaces after ion cyclotron wall conditioning in ASDEX upgrade. Nuclear Materials and Energy, 12, 733 - 735. https://doi.org/10.1016/j.nme.2016.12.018