Suprathermal electrons in kJ-laser produced plasmas: M- shell resolved high-resolution x-ray spectroscopic study of transient matter evolution

9th International Conference on Inertial Fusion Sciences and Applications

Condamine, F.P.^1,2 ; Šmid, M.^1 ; Renner, O.^3 ; Dozieres, M.^4 ; Thais, F.^4 ; Angelo, P.^1,2 ; Bobin, J.-L.^1,2 ; Rosmej, F.B.^1,2

Sorbonne Universités, Pierre et Marie Curie UPMC, UMR7605, LULI, case 128, 4 Place Jussieu, Paris Cedex 05

F-75252, France^1

Ecole Polytechnique, LULI, CEA-CNRS-UPMC-UPS, Palaiseau, France^2

Institute of Physics of the ASCR, ELI Beamlines Project, Prague, Czech Republic^3

CEA, DSM, IRAMIS, LIDyL, Saclay, Gif-sur-Yvette, France^4

关键词: Atomic structure calculations;    Bragg crystal spectrometer;    Non-equilibrium phenomena;    Prague , Czech Republic;    Radiative properties;    Spectral distribution;    Spectroscopic studies;    Suprathermal electrons;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/717/1/012060/pdf
DOI  :  10.1088/1742-6596/717/1/012060

来源: IOP

【 摘 要 】

Hot electrons are of key importance to understand many physical processes in plasma physics. They impact strongly on atomic physics as almost all radiative properties are seriously modified. X-ray spectroscopy is of particular interest due to reduced photoabsorption in dense matter. We report on a study of the copper Kα X-ray emission conducted at the ns, kJ laser facility PALS, Prague, Czech Republic. Thin copper foils have been irradiated with 1ω pulses. Two spherically bent quartz Bragg crystal spectrometers with high spectral and spatial resolution have been set up simultaneously to achieve a high level of confidence in the spectral distribution. In particular, an emission on the red wing of the Kα2transition (λ = 1.5444 Å) could be identified with complex atomic structure calculations. We discuss possible implications for the analysis of non-equilibrium phenomena and present first atomic physics simulations.