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Theoretical and experimental studies of the radiative properties of hot dense matter for optimizing soft X-ray sources

  • N.Yu. Orlov (a1), S.Yu. Gus'kov (a2), S.A. Pikuz (a2), V.B. Rozanov (a2), T.A. Shelkovenko (a2), N.V. Zmitrenko (a3) and D.A. Hammer (a4)...

Abstract

Theoretical and experimental studies of radiative properties of hot dense plasmas that are used as soft X-ray sources have been carried out depending on the plasma composition. Important features of the theoretical model, which can be used for complex materials, are discussed. An optimizing procedure that can determine an effective complex material to produce optically thick plasma by laser interaction with a thick solid target is applied. The efficiency of the resulting material is compared with the efficiency of other composite materials that have previously been evaluated theoretically. It is shown that the optimizing procedure does, in practice, find higher radiation efficiency materials than have been found by previous authors. Similar theoretical research is performed for the optically thin plasma produced from exploding wires. Theoretical estimations of radiative efficiency are compared with experimental data that are obtained from measurements of X-pinch radiation energy yield using two exploding wire materials, NiCr and Alloy 188. It is shown that theoretical calculations agree well with the experimental data.

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Corresponding author

Address correspondence and reprint requests to: N. Yu. Orlov: Joint Institute for High Temperatures RAS, Institute for High Energy Density, 13/19 Izhorskaya, 127412, Moscow.

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