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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: | , , , , , , , , , , |
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Format: | Conference Proceeding |
Language: | English |
Subjects: | |
Online Access: | Get full text |
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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. |
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ISSN: | 1574-1818 |