This title appears in the Scientific Report :
2014
Please use the identifier:
http://dx.doi.org/10.1088/0031-8949/2014/T159/014042 in citations.
Overview of nitrogen-15 application as a tracer gas for material migration and retention studies in tokamaks
Overview of nitrogen-15 application as a tracer gas for material migration and retention studies in tokamaks
Experimental and analytical procedures related to the application of nitrogen-15 isotope for material migration studies have been developed and used for tracer experiments in the TEXTOR and ASDEX-Upgrade tokamaks in order to assess the retention of nitrogen in plasma-facing components made of graphi...
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Personal Name(s): | Petersson, P. (Corresponding Author) |
---|---|
Rubel, M. / Possnert, G. / Brezinsek, S. / Kreter, A. / Möller, S. / Hakola, A. / Mayer, M. / Miettunen, J. / Airila, M. I. / Makkonen, T. / Neu, R. / Rohde, V. | |
Contributing Institute: |
Plasmaphysik; IEK-4 |
Published in: | Physica scripta, T159 (2014) S. 014042 |
Imprint: |
Bristol
IoP Publ.
2014
|
DOI: |
10.1088/0031-8949/2014/T159/014042 |
Document Type: |
Journal Article |
Research Program: |
Plasma-wall interactions |
Publikationsportal JuSER |
Experimental and analytical procedures related to the application of nitrogen-15 isotope for material migration studies have been developed and used for tracer experiments in the TEXTOR and ASDEX-Upgrade tokamaks in order to assess the retention of nitrogen in plasma-facing components made of graphite and tungsten. The surface study was performed by time-of-flight heavy ion elastic recoil detection analysis and by means of nuclear reaction analysis based on the 15N(p,γα)12C process. In both tokamaks nitrogen retention has exceeded 10% of the injected gas. In ASDEX-Upgrade the largest fraction of 15N has been detected on protruding parts near the injection port, while around 4% has been found in the divertor. The ASDEX-Upgrade results have also been modeled. Helium trapping has been measured in deposits containing tungsten and nitrogen. |