Investigation of x-ray emission induced by hot electrons in dense Cu plasmas

Spectral lines induced by the action of suprathermal electrons in a laser-irradiated (400 J, 1315 nm, 250 ps, I = 4 × 1016 W cm−2) Cu target were observed. A whole set of transitions between Kα and Heα lines originating from Be-like to Ne-like Cu was identified. The emission was modeled using the Fl...

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Bibliographic Details
Published in:Physica scripta 2014-05, Vol.T161 (1), p.14020
Main Authors: Šmíd, Michal, Renner, Old ich, Rosmej, Frank B, Khaghani, Dimitri
Format: Article
Language:English
Subjects:
collisional-radiative model
hot electrons
laser-produced plasma
radiation
satellite lines
x-ray spectroscopy
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Summary:Spectral lines induced by the action of suprathermal electrons in a laser-irradiated (400 J, 1315 nm, 250 ps, I = 4 × 1016 W cm−2) Cu target were observed. A whole set of transitions between Kα and Heα lines originating from Be-like to Ne-like Cu was identified. The emission was modeled using the Flychk code [1]; the resulting theoretical spectra were integrated over a wide range of bulk plasma temperatures and hot electron fractions to obtain good agreement with the experimental data. The simulation procedure used offers a basis for the development of alternative x-ray spectroscopic diagnostics for hot electrons.
ISSN:0031-8949
1402-4896
DOI:10.1088/0031-8949/2014/T161/014020