Phys. Rev. E 78, 066406 (2008) [5 pages]Bremsstrahlung and line spectroscopy of warm dense aluminum plasma heated by xuv free-electron-laser radiationReceived 25 April 2008; revised 20 October 2008; published 30 December 2008 We report the creation of solid-density aluminum plasma using free-electron laser (FEL) radiation at 13.5 nm wavelength. Ultrashort pulses were focused on a bulk Al target, yielding an intensity of 2×1014 W∕cm2. The radiation emitted from the plasma was measured using an xuv spectrometer. Bremsstrahlung and line intensity ratios yield consistent electron temperatures of about 38 eV, 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. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevE.78.066406
DOI:
10.1103/PhysRevE.78.066406
PACS:
52.50.Jm, 52.25.Os, 52.27.Gr, 52.70.La
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