Etudes expérimentales et numériques de l'accélération d'ions à partir de cibles gazeuses quasi critiques

Autor: Ospina-Bohórquez, Valeria

Publikováno v: Physics [physics]. Université de Bordeaux; Universidad de Salamanca (Espagne). Facultad de ciencias, 2022. English. ⟨NNT : 2022BORD0416⟩

Fast ion sources driven by ultraintense lasers are promising in many fields of fundamental and applied science. While laser-based ion acceleration from solids has been extensively studied, near-critical-density plasmas have been little addressed so f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______3515::6a6538d0ba7e67fdc3bad878ade0e38b
https://theses.hal.science/tel-04011154

Optimisation de l’accélération d’ions par choc électrostatique dans un jet de gaz et application à la production de radioisotopes

Autor: Bonvalet, Julien

Publikováno v: Astrophysique [astro-ph]. Université de Bordeaux, 2022. Français. ⟨NNT : 2022BORD0134⟩

The production of radioisotopes in relevance with the nuclear medecine community is nowadays warranted by cyclotrons. These radioisotopes, once produced, are injectedin the patient body for curative or diagnostics purpose. For β + emitters, the posi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::d3922ed974aef09b7b3c43be55b69003
https://theses.hal.science/tel-03772538

Gamma-ray production in laser-matter interaction and electron-positron pair creation by photon-photon collisions

Autor: Esnault, Léo

Publikováno v: Physique Atomique [physics.atom-ph]. Université de Bordeaux, 2021. Français. ⟨NNT : 2021BORD0077⟩

Electron-positron pair creation by the mean of two real photon collision (linear Breit-Wheeler process) is one of the most basic quantum electrodynamics process, and is believed to underlie a large amount of high energy astrophysical phenomena, such

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::6b9134401ece8fbf4b1eb6f26275f7b2
https://tel.archives-ouvertes.fr/tel-03204457

Modelization of X ray sources created by laser-plasma interaction in the relativistic regime

Autor: Bourgeois, Pierre-Louis

Publikováno v: Physique des plasmas [physics.plasm-ph]. Institut Polytechnique de Paris, 2020. Français. ⟨NNT : 2020IPPAX073⟩

When an ultra-short ultra-intense laser impulsion propagates through a low density gas jet, a plasma is created and a bunch of electrons can be accelerated through laser wakefield acceleration to Gev energies in only a few centimetres. Those accelera

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::0f536287700e14687e3c522662939f1e
https://tel.archives-ouvertes.fr/tel-03086213/document

Control of energy deposition in dielectrics by femtosecond Bessel beams : spatio-temporal plasma density and applications to glass stealth dicing

Autor: Meyer, Rémi

Publikováno v: Optique [physics.optics]. Université Bourgogne Franche-Comté, 2020. Français. ⟨NNT : 2020UBFCD012⟩

The use of ultrashort pulses for laser ablation allows for a precise energy deposition thanks to a highly confined laser-matter interaction. The non-linear effects causing this confinement are also usually responsible of beam profile distorsions alon

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______212::c2b9be9cf463b0ac08bbd46f07dba487
https://tel.archives-ouvertes.fr/tel-03123492