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Analyse spectroscopique et simulation numérique d'une expérience de plasma de néon photoionisé

Manuel Jullien 1
1 LMCE - Laboratoire Matière sous Conditions Extrêmes
Université Paris-Saclay, DAM/DIF - DAM Île-de-France
Abstract : In the case of X-ray binaries or active galaxy nuclei, the accretion of matter on the compact and massive object releases extremely intense radiation which photoionizes the surrounding gas.With high-power facilities, we are now reproducing in the laboratory photoionized plasmas representative of these accretion discs.During this thesis, a numerical platform was developed to interpret the results of photoionized plasma experiments produced in the laboratory. To assess its reliability, the modeling of an experiment carried out on the LULI2000 installation was, for the first time, developed. The restitution of the recorded spectra is carried out by post-processing data calculated by a hydrodynamic-radiative simulation. For the sake of consistency, the same atomic kinetic model is used both in the simulation and for the restitution of detailed spectra. Atomic physics is treated by a quantum formalism, where ionic populations can be described by a more or less detailed atomic structure representation. This study demonstrates that radiative-hydrodynamic simulation is required for the interpretation of spectra from photoionized plasmas.
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Submitted on : Friday, July 23, 2021 - 2:53:08 PM
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Manuel Jullien. Analyse spectroscopique et simulation numérique d'une expérience de plasma de néon photoionisé. Physique des Hautes Energies - Théorie [hep-th]. Université Paris-Saclay, 2021. Français. ⟨NNT : 2021UPASP025⟩. ⟨tel-03297918⟩

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