20 research outputs found

    Cultural Geography: By Whom, for Whom?

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    Journal of Cultural Geography221147-15

    Hyperfeinstrukturuntersuchungen zur Bestimmung des Kernquadrupolmoments des kurzlebigen Nuklids Cu durch Resonanzstreuung von Licht

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    SIGLECopy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

    Le MOX : une réussite industrielle

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    Le savoir-faire et la technologie du groupe Areva sont reconnus au niveau international, entre autres dans le domaine du recyclage. La fabrication de combustible MOX a des atouts que l'usine MELOX (filiale du groupe Areva) met en oeuvre depuis 10 ans, grâce au procédé de fabrication MIMAS. un panorama des usines de combustibles Mox en Europe, de développer les avantages du recyclage de plutonium avec un zoom sur l'usine de Melox, aujourd'hui leader mondial du Mox

    MOX Fuel Utilization in Existing German LWRs: Design and Safety Aspects, Core Performance and Irradiation Experience

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    MOX Fuel Technology and MOX Performance in Germany; Plutonium Handling Experience

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    L’utilisation du plutonium d’origine militaire, les accords internationaux

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    Dans le cadre des accords entre les Etats-Unis et la Russie pour l’élimination du plutonium militaire en excès, l’usine MFFF (MOX Fuel Fabrication Facility) est en cours de construction à Savannah River, en Caroline du Sud. Elle est basée sur la technologie et le procédé MELOX d’AREVA NC et s’appuie sur une trentaine d’années d’expérience industrielle du recyclage MOX dans plus de 35 réacteurs commerciaux à eau légère. Concernant la Russie, l’option envisagée est le recyclage en réacteurs à neutrons rapides

    Structural properties of epitaxial YSZ and doped CeO2 films on different substrates prepared by liquid sources MOCVD (LSMOCVD)

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    With LSMOCVD it is possible to deposit reproducibly oxide films without need for high vacuum systems. On in-plane aligned oxide and metallic substrates epitaxial film growth takes place. Film morphology, interface layers and surface roughness can be controlled by choice of deposition parameters like temperature, gas phase composition and mass flow. The layers were characterized by SEM, AFM and texture analysis. Yttria-stabilized zirconia (YSZ), ceria and ceria doped with Gadolinium are prepared and the dependence of film properties on deposition parameters is investigated. The suitability of these films for the use of buffer layers in YBCO-deposition is discussed

    In situ determination of laser induced degradation of micro-mirror arrays

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    The Fraunhofer Institute for Photonic Microsystems (Fraunhofer IPMS) develops spatial light modulators (SLMs) based on arrays of tiltable micro mirrors on a semiconductor chip. Typical applications are pattern generation for deep UV-laser mask writing or structured illumination in microscopy. Development and optimization of such SLMs requires detailed knowledge of the device behaviour under operating conditions. Here, the flatness of each single mirror effects the image resolution and contrast of the generated pattern and is amongst others a characteristic property of SLMs. In this context a surface topography measurement under laser exposure (in situ) was designed. The interferometric setup uses the phase-shift principle and allows a resolution in z-direction in the single-digit nanometer range. During irradiation with UV-laser light at 248 nm (KrF) and energy densities of up to 20 mJ/cm 2 the change in single micro-mirrors topography was detected in situ. Measurements with varying pulse energies were carried out to identify an impact on the device performance. In general, the setup is neither limited to a specific illumination wavelength nor to micro-mirrors as structures under test
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