Abstract
The effect of induced transparency of thin Al foils radiatively heated by intense extreme ultraviolet (EVU) radiation has been observed. The radiation of the plasma of Z-pinches appearing under the compression of tungsten liners at the Angara-5-1 facility has been used as the radiation that heats the Al foil (peak illumination on the foil ~0.55 TW/cm2) and is transmitted through it. The photoabsorption has been studied in the formed aluminum plasma at temperatures of ~10–30 eV in the density range of ~1–20 mg/cm3 in the wavelength range of ~5–24 nm. Absorption lines of Al4+...7+ ions have been identified in the experimental spectrum. In addition, radiative gas-dynamic simulations of the foil heating and expansion have been performed taking into account radiation transfer processes.
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Original Russian Text © E.V. Grabovski, P.V. Sasorov, A.P. Shevelko, V.V. Aleksandrov, S.N. Andreev, M.M. Basko, A.V. Branitski, A.N. Gritsuk, G.S. Volkov, Ya.N. Laukhin, K.N. Mitrofanov, V.G. Novikov, G.M. Oleinik, A.A. Samokhin, V.P. Smirnov, I.Yu. Tolstikhina, I.N. Frolov, O.F. Yakushev, 2016, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2016, Vol. 103, No. 5, pp. 394–401.
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Grabovski, E.V., Sasorov, P.V., Shevelko, A.P. et al. Radiative heating of thin Al foils by intense extreme ultraviolet radiation. Jetp Lett. 103, 350–356 (2016). https://doi.org/10.1134/S0021364016050040
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DOI: https://doi.org/10.1134/S0021364016050040