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The hydrodynamic and radiative properties of low-density foams heated by x-rays

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    0455700 - UFP-V 2016 RIV GB eng J - Journal Article
    Rosmej, O. N. - Suslov, N. - Martsovenko, D. - Vergunova, G. - Borisenko, N. - Orlov, N. - Rienecker, T. - Klír, Daniel - Řezáč, Karel - Orekhov, A. - Borisenko, L. - Krouský, Eduard - Pfeifer, Miroslav - Dudžák, Roman - Maeder, R. - Schaechinger, M. - Schoenlein, A. - Zaehter, S. - Jacoby, J. - Limpouch, J. - Ullschmied, Jiří - Zhidkov, N.
    The hydrodynamic and radiative properties of low-density foams heated by x-rays.
    Plasma Physics and Controlled Fusion. Roč. 57, č. 9 (2015), č. článku 094001. ISSN 0741-3335
    R&D Projects: GA MŠk(CZ) LG13029; GA MŠk LM2010014
    Grant - others:FP7(XE) 284464
    Institutional support: RVO:61389021
    Keywords : hohlraum * low density polymer aerogel * opacity * Planckian radiation * plasma * x-rays
    Subject RIV: BL - Plasma and Gas Discharge Physics
    OBOR OECD: Fluids and plasma physics (including surface physics)
    Impact factor: 2.404, year: 2015;

    An advanced type of hydrodynamic stable plasma targets with homogeneous distribution of plasma parameters has been proposed for application in experiments on heavy ion stopping in plasmas and relativistic laser based particle acceleration.Plasma was created via x-ray heating of polymer aerogels with a mean density 10(3) times lower than that of solid matter. Hydrodynamic and radiation properties of low-density polymer aerogels heated by x-rays,which were generated due to laser interaction with a gold hohlraum, have been investigated experimentally and numerically.In experiments carried out at the PALS laser facility in Prague, the parameters of the hohlraum based soft x-ray source and the fraction of x-ray energy absorbed by foam layers have been measured.The results of these experiments and numerical simulations show that the x-ray heat process occurs via propagation of supersonic radiation driven heat waves.The measured heat wave velocity of 10(7) cm s(-1) allows one to estimate
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