Quastel aaron (6 Ergebnisse)
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Taschenbuch. Zustand: Neu. Impurity Effects on Deuterium Retention in Single Crystal Tungsten | Plasma-Surface Interaction, Plasma Facing Materials in Fusion Reactors - Fusion Research | Aaron D. Quastel | Taschenbuch | 88 S. | Englisch | 2010 | LAP LAMBERT Academic Publishing | EAN 9783838309583 | Verantwortliche Person für die… EU: BoD - Books on Demand, In de Tarpen 42, 22848 Norderstedt, info[at]bod[dot]de | Anbieter: preigu.
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Taschenbuch. Zustand: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Tungsten will be used in the divertor section of the ITER fusion reactor. The divertor is exposed to fluxes of deuterium, tritium, helium and other plasma nuclei. The role of impurities in the retention of deuterium in single crystal…tungsten at room temperature has been investigated. To avoid the effects of air exposure, the D implantation and the subsequent D retention measurement using TDS was performed in the same vacuum chamber without breaking vacuum. For fluences of 1x10^23 D/m^2, desorption peaks were observed, at ~400 K and at ~600 K. The use of liquid nitrogen cooling of the ion beam aperture led to a reduction of the background gas impurities in the vacuum test chamber, which almost completely eliminated the post-irradiation TDS peak at 400 K. Reduction of these gas impurities has led to a reduction in the total deuterium retention. Furthermore, implanted deuterium in the W specimens was released when the vacuum system was gently baked before TDS, resulting in an additional reduction in the total amount of retained D. It was also found that post- implantation time delay before performing TDS lead to a significant loss of the implanted deuterium. 88 pp. Englisch.
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Zustand: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Quastel Aaron D.Aaron is Mechanical Engineering graduate from the University of Manitoba. He also holds a MASc degree in Fusion energy research from the University of Toronto. He worked at AECL and is pur…suing a PhD degree in Nuclear.
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Taschenbuch. Zustand: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Tungsten will be used in the divertor section of the ITER fusion reactor. The divertor is exposed to fluxes of deuterium, tritium, helium and other plasma nuclei. The role of impurities in the retention of deuterium in single crystal tung…sten at room temperature has been investigated. To avoid the effects of air exposure, the D implantation and the subsequent D retention measurement using TDS was performed in the same vacuum chamber without breaking vacuum. For fluences of 1x10^23 D/m^2, desorption peaks were observed, at ~400 K and at ~600 K. The use of liquid nitrogen cooling of the ion beam aperture led to a reduction of the background gas impurities in the vacuum test chamber, which almost completely eliminated the post-irradiation TDS peak at 400 K. Reduction of these gas impurities has led to a reduction in the total deuterium retention. Furthermore, implanted deuterium in the W specimens was released when the vacuum system was gently baked before TDS, resulting in an additional reduction in the total amount of retained D. It was also found that post- implantation time delay before performing TDS lead to a significant loss of the implanted deuterium.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 88 pp. Englisch.
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Taschenbuch. Zustand: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Tungsten will be used in the divertor section of the ITER fusion reactor. The divertor is exposed to fluxes of deuterium, tritium, helium and other plasma nuclei. The role of impurities in the retention of deuterium in single crystal tungs…ten at room temperature has been investigated. To avoid the effects of air exposure, the D implantation and the subsequent D retention measurement using TDS was performed in the same vacuum chamber without breaking vacuum. For fluences of 1x10^23 D/m^2, desorption peaks were observed, at ~400 K and at ~600 K. The use of liquid nitrogen cooling of the ion beam aperture led to a reduction of the background gas impurities in the vacuum test chamber, which almost completely eliminated the post-irradiation TDS peak at 400 K. Reduction of these gas impurities has led to a reduction in the total deuterium retention. Furthermore, implanted deuterium in the W specimens was released when the vacuum system was gently baked before TDS, resulting in an additional reduction in the total amount of retained D. It was also found that post- implantation time delay before performing TDS lead to a significant loss of the implanted deuterium.
