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The reflectors specifications of amplifying section of LMJ need to have spectral reflectance measurements more accurate. The innovative solution proposes to increase the precision of reflectance measurements and to detect heterogeneities in reflectance. The Laser MegaJoule: towards the reflectors of the amplifying sectionThe Megajoule Laser Project (LMJ) and the National Ignition Facility (NIF) constitute a great technological challenge of this century, more particularly for the optical components. A laser source is amplified to reach 1.8 million Joule in order to realize thermonuclear reactions [1]. This paper deals with the amplifying section of LMJ and with its reflectors. The amplifying section is composed of amplifying units, themselves composed of many plates of doped neodymium glasses. These plates lighted by flash xenon lamps, are set in caissons of reflectors to increase the efficiency of the conversion from the flashes' energy to the laser's energy. These metallic reflectors placed behind lamps, are coated and their shape are chosen to have the best results with the lowest cost. The technical specifications of these reflectors describe too their dimension and their shape: the elements are 2 meters high and sometimes are not plan (corners, valleys, wavelets …). The Fig. 1 (a) describes a view of a caisson. At the centre, neodymium glasses have been shown and reflectors are set all around. The coating of this reflective surface is a high reflector in the domain of pumping of laser plates. Fig. 1 (b) presents some reflectors which had been coated by magnetron technology.(a) (b) Fig. 1 (a). Diagram of the amplifying section and view of an amplifying unit. Photography presents a doped neodymium glass with its flash lamps. (b) Photography of reflectors no planar. a1003_1.pdfOFTuA5.pdf

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Developments made during the EU FP7-funded project iTesla towards automatic ways of transforming power systems from proprietary format to Modelica, served as a proof of concept for the adoption of Modelica as a common and standardized language for power system modelling and simulation. This work is a continuation of the progress made during the iTesla project. This paper presents a tool developed with the main purpose of providing users with an easy way to generate power system networks in Modelica and perform time-domain simulations. The tool is validated by generating Modelica systems for IEEE cases and comparing simulation outputs with a reference commercial tool (Eurostag).