TY - JOUR
T1 - Injection of nitrogen-15 tracer into ASDEX-Upgrade
T2 - New technique in material migration studies
AU - Petersson, P.
AU - Hakola, A.
AU - Likonen, J.
AU - Mayer, M.
AU - Miettunen, J.
AU - Neu, R.
AU - Rohde, V.
AU - Rubel, M.
N1 - Funding Information:
This work, supported by the European Communities under the contract of Association between EURATOM/VR, was carried out within the framework of the European Fusion Development Agreement. The views and opinions expressed herein do not necessarily reflect those of the European Commission. The work was partly funded under the Contract 621-2009-4138 from the Swedish Research Council (VR).
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.
UR - http://www.scopus.com/inward/record.url?scp=84885475220&partnerID=8YFLogxK
U2 - 10.1016/j.jnucmat.2013.01.129
DO - 10.1016/j.jnucmat.2013.01.129
M3 - Article
AN - SCOPUS:84885475220
SN - 0022-3115
VL - 438
SP - S616-S619
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - SUPPL
ER -