Theoretical and experimental studies of radiative and gas dynamic properties of substances at high energy density in matter

30th International Conference on Interaction of Intense Energy Fluxes with Matter

Orlov, N.Yu.^1 ; Denisov, O.B.^1 ; Vergunova, G.A.^2 ; Rosmej, O.N.^3

Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13, Moscow

125412, Russia^1

Lebedev Physical Institute, Russian Academy of Sciences, Leninsky Avenue 53, Moscow

119991, Russia^2

GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, Darmstadt

64291, Germany^3

关键词: Comparison with experiments;    High energy densities;    Quantum-mechanical calculation;    Radiative efficiency;    Radiative properties;    Temperature diagnostics;    Theoretical approach;    Theoretical estimation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/653/1/012021/pdf
DOI  :  10.1088/1742-6596/653/1/012021

来源: IOP

【 摘 要 】

Mathematical modelling of radiative and gas-dynamic processes in substances at high energy density is carried out for experiments, where both laser and heavy ion beams are used. Important features of the theoretical model, known as the ion model (IM), which is used for quantum mechanical calculations of radiative opacity, are discussed. Reliability of (IM) results is tested with experiment, where measurements of x-pinch radiation energy yield for two exploding wire materials, NiCr and Alloy 188 were made. Theoretical estimations of radiative efficiency are compared with experimental results, and (IM) calculations agree well with the experimental data. Subsequently, the theoretical approach was used for temperature diagnostics of CHO plasma target in combined laser-heavy ion beam experiments. Joint radiative and gas-dynamic calculations are performed for comparison with experiment, where hohlraum radiation transmits through the CHO plasma target, and the share of absorbed radiation energy is compared with experiment. Study of radiative properties of CHO plasma with little admixture of gold is carried out as well. Specific dependence of the Rosseland mean on plasma temperature is discussed for gold plasma.