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, ASDEX-Upgrade Team, TEXTOR Team

Research output: Contribution to journalArticleScientificpeer-review

10 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 languageEnglish
Article number014042
JournalPhysica Scripta
Issue numberT159
DOIs
Publication statusPublished - 2014
MoE publication typeA1 Journal article-refereed

Fingerprint

nitrogen 15
Nitrogen
tracers
Migration
nitrogen
tungsten
gases
nuclear reactions
Graphite
Time-of-flight
heavy ions
graphite
isotopes
Trapping
helium
trapping
deposits
injection
Injection
Plasma

Keywords

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

Cite this

Petersson, P., Rubel, M., Possnert, G., Brezinsek, S., Kreter, A., Möller, S., ... Team, TEXTOR. (2014). Overview of nitrogen-15 application as a tracer gas for material migration and retention studies in tokamaks. Physica Scripta, (T159), [014042]. https://doi.org/10.1088/0031-8949/2014/T159/014042
Petersson, P. ; Rubel, M. ; Possnert, G. ; Brezinsek, S. ; Kreter, A. ; Möller, S. ; Hakola, Antti ; Mayer, M. ; Miettunen, J. ; Airila, Markus ; Makkonen, T. ; Neu, R. ; Rohde, V. ; Team, ASDEX-Upgrade ; Team, TEXTOR. / Overview of nitrogen-15 application as a tracer gas for material migration and retention studies in tokamaks. In: Physica Scripta. 2014 ; No. T159.
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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 ASDEX-Upgrade Team and TEXTOR Team",
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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, Team, ASDEX-U & Team, TEXTOR 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

Overview of nitrogen-15 application as a tracer gas for material migration and retention studies in tokamaks. / Petersson, P.; Rubel, M.; Possnert, G.; Brezinsek, S.; Kreter, A.; Möller, S.; Hakola, Antti; Mayer, M.; Miettunen, J.; Airila, Markus; Makkonen, T.; Neu, R.; Rohde, V.; Team, ASDEX-Upgrade; Team, TEXTOR.

In: Physica Scripta, No. T159, 014042, 2014.

Research output: Contribution to journalArticleScientificpeer-review

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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 - Team, ASDEX-Upgrade

AU - Team, TEXTOR

PY - 2014

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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

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