Injection of nitrogen-15 tracer into ASDEX-Upgrade: New technique in material migration studies

P. Petersson, Antti Hakola, Jari Likonen, M. Mayer, J. Miettunen, R. Neu, V. Rohde, M. Rubel, ASDEX Upgrade Team

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

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 15N(1H, γ4He)12C process and detecting both γ radiation and 4He. The highest and peaked concentrations of 15N, 8 × 1016 cm2, 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.
Original languageEnglish
Pages (from-to)S616-S619
Number of pages3
JournalJournal of Nuclear Materials
Volume438
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed
Event20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices - Aachen, Aachen, Germany
Duration: 21 May 201225 May 2012

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nitrogen 15
Limiters
tracers
Nitrogen
Gases
injection
Nuclear reactions
Tile
tiles
gases
Radiation
nuclear reactions
retrieval
nitrogen
radiation
profiles
simulation

Cite this

Petersson, P. ; Hakola, Antti ; Likonen, Jari ; Mayer, M. ; Miettunen, J. ; Neu, R. ; Rohde, V. ; Rubel, M. ; ASDEX Upgrade Team. / Injection of nitrogen-15 tracer into ASDEX-Upgrade : New technique in material migration studies. In: Journal of Nuclear Materials. 2013 ; Vol. 438. pp. S616-S619.
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abstract = "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 15N(1H, γ4He)12C process and detecting both γ radiation and 4He. The highest and peaked concentrations of 15N, 8 × 1016 cm2, 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.",
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Injection of nitrogen-15 tracer into ASDEX-Upgrade : New technique in material migration studies. / Petersson, P.; Hakola, Antti; Likonen, Jari; Mayer, M.; Miettunen, J.; Neu, R.; Rohde, V.; Rubel, M.; ASDEX Upgrade Team.

In: Journal of Nuclear Materials, Vol. 438, 2013, p. S616-S619.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Injection of nitrogen-15 tracer into ASDEX-Upgrade

T2 - New technique in material migration studies

AU - Petersson, P.

AU - Hakola, Antti

AU - Likonen, Jari

AU - Mayer, M.

AU - Miettunen, J.

AU - Neu, R.

AU - Rohde, V.

AU - Rubel, M.

AU - ASDEX Upgrade Team

PY - 2013

Y1 - 2013

N2 - 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 15N(1H, γ4He)12C process and detecting both γ radiation and 4He. The highest and peaked concentrations of 15N, 8 × 1016 cm2, 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.

AB - 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 15N(1H, γ4He)12C process and detecting both γ radiation and 4He. The highest and peaked concentrations of 15N, 8 × 1016 cm2, 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.

U2 - 10.1016/j.jnucmat.2013.01.129

DO - 10.1016/j.jnucmat.2013.01.129

M3 - Article

VL - 438

SP - S616-S619

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

ER -