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Investigation of probe surfaces after ion cyclotron wall conditioning in ASDEX upgrade
KTH, School of Electrical Engineering and Computer Science (EECS), Fusion Plasma Physics.ORCID iD: 0000-0001-5603-8559
KTH, School of Electrical Engineering and Computer Science (EECS), Fusion Plasma Physics.
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2017 (English)In: NUCLEAR MATERIALS AND ENERGY, ISSN 2352-1791, Vol. 12, p. 733-735Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 12, p. 733-735
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:kth:diva-220646DOI: 10.1016/j.nme.2016.12.018ISI: 000417293300119Scopus ID: 2-s2.0-85017170041OAI: oai:DiVA.org:kth-220646DiVA, id: diva2:1173116
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QC 20180111

Available from: 2018-01-11 Created: 2018-01-11 Last updated: 2018-01-11Bibliographically approved

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Garcia Carrasco, AlvaroPetersson, Per

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