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23 November 2015 Dedicated contamination experiments in the Orion laser target chamber
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The use of solid targets irradiated in a vacuum target chamber by focussed high energy, high power laser beams to study the properties of matter at high densities, pressures and temperatures are well known. An undesirable side effect of these interactions is the generation of plumes of solid, liquid and gaseous matter which move away from the target and coat or physically damage surfaces within the target chamber. The largest aperture surfaces in these chambers are usually the large, high specification optical components used to produce the extreme conditions being studied [e.g. large aperture off axis parabolas, aspheric lenses, X ray optics and planar debris shields]. In order to study these plumes and the effects that they produce a set of dedicated experiments were performed to evaluate target by product coating distributions and particle velocities by a combined diagnostic instrument that utilised metal witness plates, polymer witness plates, fibre velocimetry and low density foam particle catchers.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. Andrew, J.-M. Chevalier, D. Egan, A. Geille, J.-P. Jadaud, J.-H. Quessada, D. Raffestin, M. Rubery, P. Treadwell, and L. Videau "Dedicated contamination experiments in the Orion laser target chamber", Proc. SPIE 9632, Laser-Induced Damage in Optical Materials: 2015, 96320E (23 November 2015);

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