Injection of nitrogen-15 tracer into ASDEX-Upgrade: New technique in material migration studies
2013 (English)In: Journal of Nuclear Materials, ISSN 0022-3115, E-ISSN 1873-4820, Vol. 438, no SUPPL., S616-S619 p.Article in journal (Refereed) Published
For the first time nitrogen-15 gas was used as a tracer for determining of global nitrogen retention in ASDEX-Upgrade. The injection done from the midplane gas inlet on the last day of the experimental campaign was followed by retrieval and ex situ analyses of many limiter and divertor tiles. The study was done by nuclear reaction analysis using the N-15(H-1,gamma He-4)C-12 process and detecting both gamma radiation and He-4. The highest and peaked concentrations of N-15, 8 x 10(16) cm(2), were found on limiters close to the injection point, while fairly homogeneous flat profiles were measured on most of the divertor plates. The measured concentrations are compared to an ASCOT simulation of the injection.
Place, publisher, year, edition, pages
2013. Vol. 438, no SUPPL., S616-S619 p.
ASDEX-upgrade, Divertor plate, Divertor tiles, Ex situ analysis, Experimental campaign, Material migration, Nitrogen retention, Nuclear reaction analysis
Fusion, Plasma and Space Physics
IdentifiersURN: urn:nbn:se:kth:diva-136871DOI: 10.1016/j.jnucmat.2013.01.129ISI: 000330795300128ScopusID: 2-s2.0-84885475220OAI: oai:DiVA.org:kth-136871DiVA: diva2:677385
20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices (PSI), Forschungszentrum Julich, Aachen, Germany, MAY 21-25, 2012
QC 201402042013-12-092013-12-092014-03-11Bibliographically approved