Reference : Investigation of advanced materials for fusion alpha particle diagnostics
Scientific journals : Article
Engineering, computing & technology : Energy
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/147365
Investigation of advanced materials for fusion alpha particle diagnostics
English
Bonheure, G. [Laboratory for Plasma Physics, Association Euratom-Belgian State, Royal Military Academy, Avenue de la Renaissance, 30 Kunstherlevinglaan, B-1000 Brussels, Belgium]
Van Wassenhove, G. [Laboratory for Plasma Physics, Association Euratom-Belgian State, Royal Military Academy, Avenue de la Renaissance, 30 Kunstherlevinglaan, B-1000 Brussels, Belgium]
Hult, M. [Institute for Reference Materials and Measurements (IRMM), Retieseweg 111, B-2440 Geel, Belgium]
González de Orduña, R. [Institute for Reference Materials and Measurements (IRMM), Retieseweg 111, B-2440 Geel, Belgium]
Strivay, David mailto [Université de Liège - ULiège > Département de physique > Physique nucléaire, atomique et spectroscopie >]
Vermaercke, P. [SCKCEN, Boeretang, B-2400 Mol, Belgium]
Delvigne, T. [DSI SPRL, 3 rue Mont d'Orcq, Froyennes B-7503, Belgium]
Chene, Grégoire mailto [Université de Liège - ULiège > Département de physique > Physique nucléaire, atomique et spectroscopie >]
Delhalle, René mailto [Université de Liège - ULiège > HEC-Ecole de gestion : UER > UER Opérations >]
Huber, A. [Forschungszentrum Jülich GmbH, Institut für Plasmaphysik, EURATOM-Assoziation, Trilateral Euregio Cluster, D-52425 Jülich, Germany]
Schweer, B. [Forschungszentrum Jülich GmbH, Institut für Plasmaphysik, EURATOM-Assoziation, Trilateral Euregio Cluster, D-52425 Jülich, Germany]
Esser, G. [Forschungszentrum Jülich GmbH, Institut für Plasmaphysik, EURATOM-Assoziation, Trilateral Euregio Cluster, D-52425 Jülich, Germany]
Biel, W. [Forschungszentrum Jülich GmbH, Institut für Plasmaphysik, EURATOM-Assoziation, Trilateral Euregio Cluster, D-52425 Jülich, Germany]
Neubauer, O. [Forschungszentrum Jülich GmbH, Institut für Plasmaphysik, EURATOM-Assoziation, Trilateral Euregio Cluster, D-52425 Jülich, Germany]
2013
Fusion Engineering and Design
Elsevier Science
Yes (verified by ORBi)
International
0920-3796
[en] Activation calculations ; Advanced materials ; Fusion alpha particles ; Fusion products ; Plasma diagnostics
[en] Fusion alpha particle diagnostics for ITER remain a challenging task. Standard escaping alpha particle detectors in present tokamaks are not applicable to ITER and techniques suitable for fusion reactor conditions need further research and development [1,2]. The activation technique is widely used for the characterization of high fluence rates inside neutron reactors. Tokamak applications of the neutron activation technique are already well developed [3] whereas measuring escaping ions using this technique is a novel fusion plasma diagnostic development. Despite low alpha particle fluence levels in present tokamaks, promising results using activation technique combined with ultra-low level gamma-ray spectrometry [4] were achieved before in JET [5,6]. In this research work, we use new advanced detector materials. The material properties beneficial for alpha induced activation are (i) moderate neutron cross-sections (ii) ultra-high purity which reduces neutron-induced background activation and (iii) isotopic tailoring which increases the activation yield of the measured activation product. Two samples were obtained from GERDA[7], an experiment aimed at measuring the neutrinoless double beta decay in 76Ge. These samples, made of highly pure (9 N) germanium highly enriched to 87% in isotope Ge-76, were irradiated in real D-D fusion plasma conditions inside the TEXTOR tokamak. Comparison of the calculated and the experimentally measured activity shows good agreement. Compared to previously investigated high temperature ceramic material [8], this candidate detector offers better prospects for signal to background S/B ratio, energy resolution and particle selectivity due to a unique alpha particle signature. Applicability to ITER is discussed. Finally, research needs for further development of this diagnostic technique are outlined. © 2013.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/147365
10.1016/j.fusengdes.2013.01.029

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