Overview of nitrogen-15 application as a tracer gas for material migration and retention studies in tokamaks

P. Petersson; M. Rubel; G. Possnert; S. Brezinsek; A. Kreter; S. Möller; Antti Hakola; M. Mayer; J. Miettunen; Markus Airila; T. Makkonen; R. Neu; V. Rohde; TEXTOR Team; ASDEX Upgrade Team

doi:10.1088/0031-8949/2014/T159/014042

Overview of nitrogen-15 application as a tracer gas for material migration and retention studies in tokamaks

P. Petersson, M. Rubel, G. Possnert, S. Brezinsek, A. Kreter, S. Möller, Antti Hakola, M. Mayer, J. Miettunen, Markus Airila, T. Makkonen, R. Neu, V. Rohde, TEXTOR Team, ASDEX Upgrade Team

VTT Technical Research Centre of Finland

Research output: Contribution to journal › Article › Scientific › peer-review

12 Citations (Scopus)

Abstract

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,?a)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.

Original language	English
Article number	014042
Journal	Physica Scripta
Issue number	T159
DOIs	https://doi.org/10.1088/0031-8949/2014/T159/014042
Publication status	Published - 2014
MoE publication type	A1 Journal article-refereed

Keywords

plasma physics
nuclear physics
tokamaks
divertors
ASDEX-upgrade
tracer techniques
fuel retention

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10.1088/0031-8949/2014/T159/014042

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Petersson, P., Rubel, M., Possnert, G., Brezinsek, S., Kreter, A., Möller, S., Hakola, A., Mayer, M., Miettunen, J., Airila, M., Makkonen, T., Neu, R., Rohde, V., TEXTOR Team, & ASDEX Upgrade Team (2014). Overview of nitrogen-15 application as a tracer gas for material migration and retention studies in tokamaks. Physica Scripta, (T159), Article 014042. https://doi.org/10.1088/0031-8949/2014/T159/014042

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title = "Overview of nitrogen-15 application as a tracer gas for material migration and retention studies in tokamaks",

abstract = "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,?a)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.",

keywords = "plasma physics, nuclear physics, tokamaks, divertors, ASDEX-upgrade, tracer techniques, fuel retention",

author = "P. Petersson and M. Rubel and G. Possnert and S. Brezinsek and A. Kreter and S. M{\"o}ller and Antti Hakola and M. Mayer and J. Miettunen and Markus Airila and T. Makkonen and R. Neu and V. Rohde and {TEXTOR Team} and {ASDEX Upgrade Team}",

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doi = "10.1088/0031-8949/2014/T159/014042",

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Petersson, P, Rubel, M, Possnert, G, Brezinsek, S, Kreter, A, Möller, S, Hakola, A, Mayer, M, Miettunen, J, Airila, M, Makkonen, T, Neu, R, Rohde, V, TEXTOR Team & ASDEX Upgrade Team 2014, 'Overview of nitrogen-15 application as a tracer gas for material migration and retention studies in tokamaks', Physica Scripta, no. T159, 014042. https://doi.org/10.1088/0031-8949/2014/T159/014042

TY - JOUR

T1 - Overview of nitrogen-15 application as a tracer gas for material migration and retention studies in tokamaks

AU - Petersson, P.

AU - Rubel, M.

AU - Possnert, G.

AU - Brezinsek, S.

AU - Kreter, A.

AU - Möller, S.

AU - Hakola, Antti

AU - Mayer, M.

AU - Miettunen, J.

AU - Airila, Markus

AU - Makkonen, T.

AU - Neu, R.

AU - Rohde, V.

AU - TEXTOR Team

AU - ASDEX Upgrade Team

PY - 2014

Y1 - 2014

N2 - 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,?a)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.

AB - 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,?a)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.

KW - plasma physics

KW - nuclear physics

KW - tokamaks

KW - divertors

KW - ASDEX-upgrade

KW - tracer techniques

KW - fuel retention

U2 - 10.1088/0031-8949/2014/T159/014042

DO - 10.1088/0031-8949/2014/T159/014042

M3 - Article

SN - 0031-8949

JO - Physica Scripta

JF - Physica Scripta

IS - T159

M1 - 014042

ER -

Overview of nitrogen-15 application as a tracer gas for material migration and retention studies in tokamaks

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Keywords

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