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Spectroscopie X de plasmas chauds et denses générés par lasers UHI et XFEL

Abstract : This thesis is focused on the study of charge states distribution, population and frequency redistributions in a hot and dense plasma through the use of X-ray spectroscopic methods. These researchs are fundamentals in many fields. Studies about highly coupled plasmas, fusion sciences or astrophysics are examples of applications. This thesis presents an experimental work complemented by simulations with the aim to confront results. The two first studies are focused on the study of X-ray emission from Copper M-shell charge states in a hot and dense plasma. Experiments are made in 2 different laser regimes. The first takes place on a ns-kJ facility and the second with a UHI laser. The very high resolution results testify in details of the hot electrons impact on the X-ray target emission. Perspectives are opened due do the observation of underestimated phenomena on simulations. The end of this work shows the study of photo-absorption and frequency redistribution in a hot and dense plasma. For the first time, a heated target by an optical laser has been scanned by seeded XFEL in order to stress our models. The results indicate a misunderstanding of different phenomena and opens numerous perspec
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Submitted on : Thursday, June 11, 2020 - 12:17:19 PM
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Florian Condamine. Spectroscopie X de plasmas chauds et denses générés par lasers UHI et XFEL. Physique Atomique [physics.atom-ph]. Sorbonne Université, 2018. Français. ⟨NNT : 2018SORUS310⟩. ⟨tel-02864801⟩



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