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

doi:10.1016/j.jnucmat.2013.01.129

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

KTH Royal Institute of Technology
Max-Planck-Institut für Plasmaphysik (IPP)
Aalto University

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

19 Citations (Scopus)

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 language	English
Pages (from-to)	S616-S619
Journal	Journal of Nuclear Materials
Volume	438
DOIs	https://doi.org/10.1016/j.jnucmat.2013.01.129
Publication status	Published - 2013
MoE publication type	A1 Journal article-refereed
Event	20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices - Aachen, Aachen, Germany Duration: 21 May 2012 → 25 May 2012

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10.1016/j.jnucmat.2013.01.129

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

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.",

author = "P. Petersson and Antti Hakola and Jari Likonen and M. Mayer and J. Miettunen and R. Neu and V. Rohde and M. Rubel and \{ASDEX Upgrade Team\}",

year = "2013",

doi = "10.1016/j.jnucmat.2013.01.129",

language = "English",

volume = "438",

pages = "S616--S619",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

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note = "20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices, PSI-20 ; Conference date: 21-05-2012 Through 25-05-2012",

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TY - JOUR

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

T2 - 20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices

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

SN - 0022-3115

VL - 438

SP - S616-S619

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

Y2 - 21 May 2012 through 25 May 2012

ER -

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

Abstract

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