Zastrau U, Fortmann C, Fäustlin R R, Cao L F, Döppner T, Düsterer S, Glenzer S H, Gregori G, Laarmann T, Lee H J, Przystawik A, Radcliffe P, Reinholz H, Röpke G, Thiele R, Tiggesbäumker J, Truong N X, Toleikis S, Uschmann I, Wierling A, Tschentscher T, Förster E, Redmer R
Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität, Max-Wien Platz 1, 07743 Jena, Germany.
Phys Rev E Stat Nonlin Soft Matter Phys. 2008 Dec;78(6 Pt 2):066406. doi: 10.1103/PhysRevE.78.066406. Epub 2008 Dec 30.
We report the creation of solid-density aluminum plasma using free-electron laser (FEL) radiation at 13.5nm wavelength. Ultrashort pulses were focused on a bulk Al target, yielding an intensity of 2x10;{14}Wcm;{2} . The radiation emitted from the plasma was measured using an xuv spectrometer. Bremsstrahlung and line intensity ratios yield consistent electron temperatures of about 38eV , supported by radiation hydrodynamics simulations. This shows that xuv FELs heat up plasmas volumetrically and homogeneously at warm-dense-matter conditions, which are accurately characterized by xuv spectroscopy.
