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Radiative cooling of an Al plasma in an AlTi mixture heated by an ultraintense laser pulse

The rapid heating and cooling dynamics of thin solid foils driven by an ultraintense (∼ 10 18 Wcm −2) picosecond laser pulse has been experimentally studied through time-integrated and time-resolved x-ray emission spectroscopy as well as 2D x-ray imaging. Targets consisted of plastic foils with buri...

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Main Authors: Renaudin, P., Duthoit, L, Baton, S., Blancard, Ch, Chaleil, A., Cossé, P, Faussurier, G, Gremillet, L., Lecherbourg, L., Loupias, B., Perez, F.
Format: Conference Proceeding
Language:English
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Summary:The rapid heating and cooling dynamics of thin solid foils driven by an ultraintense (∼ 10 18 Wcm −2) picosecond laser pulse has been experimentally studied through time-integrated and time-resolved x-ray emission spectroscopy as well as 2D x-ray imaging. Targets consisted of plastic foils with buried Al or Al 42 Ti 58 layers, with Al as a tracer to infer the plasma conditions. Our measurements indicate that the Al K-shell emission occurs over a shorter duration and from a narrower region in AlTi mixtures compared to pure Al samples. The experimental data are consistent with a simple model describing the fast heating and expansion of the foil target, and pinpoint the importance of radiative cooling in high-Z samples.
ISSN:1574-1818