Počet záznamů: 1

Decay of cystalline order and equilibration during the solid-to-plasma transition induced by 20-fs microfocused 92-eV free-electron-laser pulses

  1. 1.
    0362892 - FZU-D 2012 RIV US eng J - Článek v odborném periodiku
    Galtier, E. - Rosmej, F.B. - Dzelzainis, T. - Riley, D. - Khattak, F.Y. - Heimann, P. - Lee, R. W. - Nelson, A.J. - Vinko, S.M. - Whitcher, T. - Wark, J. S. - Tschentscher, T. - Toleikis, S. - Fäustlin, R.R. - Sobierajski, R. - Jurek, M. - Juha, Libor - Chalupský, Jaromír - Hájková, Věra - Kozlová, Michaela - Krzywinski, J. - Nagler, B.
    Decay of cystalline order and equilibration during the solid-to-plasma transition induced by 20-fs microfocused 92-eV free-electron-laser pulses.
    Physical Review Letters. Roč. 106, č. 16 (2011), "164801-1"-"164801-4" ISSN 0031-9007
    Grant CEP: GA ČR GAP208/10/2302; GA MŠk LA08024; GA AV ČR IAAX00100903; GA MŠk(CZ) ME10046
    Výzkumný záměr: CEZ:AV0Z10100523
    Klíčová slova: X-ray lasers * free-electron lasers * X-ray emission spectroscopy
    Kód oboru RIV: BH - Optika, masery a lasery
    Impakt faktor: 7.370, rok: 2011

    We have studied a solid-to-plasma transition by irradiating Al foils with the FLASH free electron laser at intensities up to 1016 W/cm2. Intense XUV self-emission shows spectral features that are consistent with emission from regions of high density, which go beyond single inner-shell photoionization of solids. Characteristic features of intrashell transitions allowed us to identify Auger heating of the electrons in the conduction band occurring immediately after the absorption of the XUV laser energy as the dominant mechanism. A simple model of a multicharge state inverse Auger effect is proposed to explain the target emission when the conduction band at solid density becomes more atomiclike as energy is transferred from the electrons to the ions. This allows one to determine, independent of plasma simulations, the electron temperature and density just after the decay of crystalline order and to characterize the early time evolution.
    Trvalý link: http://hdl.handle.net/11104/0199067