On the hot electrons and Kα x-rays generation in the intense laser interaction with silver targets

31st International Conference on Equations of State for Matter

Kostenko, O.F.^1 ; Andreev, N.E.^1 ; Rosmej, O.N.^2 ; Schönlein, A.^3

Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13 Bldg 2, Moscow

125412, Russia^1

GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, Darmstadt

64291, Germany^2

Goethe University Frankfurt Am Main, Grüneburgplatz 1, Frankfurt am Main

60323, Germany^3

关键词: Intense laser;    Intensity dependence;    Laser energies;    Measurements and modeling;    Photon yield;    Silver foil;    Sub-picosecond;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/774/1/012112/pdf
DOI  :  10.1088/1742-6596/774/1/012112

来源: IOP

【 摘 要 】

Intensity dependence of the conversion efficiency of laser energy into the energy of hot electrons is determined with the aid of measurements and modeling of Kα-photon yield from silver targets irradiated by relativistically intense subpicosecond laser pulses. We take into account intensity dependence of the effective hot electron temperature assuming the Wilks' scaling. The measurements reveal approximately the same values of the Kαyield from a silver foil of 10 μm thickness, attached onto aluminium or plexiglass substrates, at the intensities about 1018W/cm2and 2 × 1019W/cm2. Intensity dependence of the Kαyield from the silver foil, calculated using determined conversion efficiency of laser energy into the energy of hot electrons, is in agreement with the measurements.