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Habilitation à diriger des recherches

Accélération de particules par interaction laser-plasma dans le régime relativiste

Abstract : This dissertation summarizes the last ten years of research at Laboratoire d'Optique Appliquée on laser-plasma based electron acceleration. The main result consists of the development and study of a relativistic electron source with unique properties: high energy (100-300 MeV) in short distances (few millimeters), mono-energetic, ultra-short (few fs), stable and tunable. The manuscript describes the steps that led to understanding the physics, and then mastering it in order to produce this new electron source. Non linear propagation of the laser pulse in the plasma is first presented, with phenomena such as non linear wakefield excitation, relativistic and ponderomotive self-focusing in the short pulse regime, self-compression. Acceleration and injection of electrons are then reviewed from a theoretical perspective. Experimental demonstrations of self-injection in the bubble regime and then colliding pulse injection are then presented. These experiments were among the first to produce monoenergetic, high quality, stable and tunable electron beams from a laser-plasma accelerator. The last two chapters are dedicated to the characterization of the electron beam using transition radiation and to its applications to gamma radiography and radiotherapy. Finally, the perspectives of this research are presented in the conclusion. Scaling laws are used to determine the parameters that the electron beams will reach using petawatt laser systems currently under construction.
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Habilitation à diriger des recherches
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https://tel.archives-ouvertes.fr/tel-00404354
Contributor : Jérôme Faure Connect in order to contact the contributor
Submitted on : Thursday, July 16, 2009 - 11:37:25 AM
Last modification on : Friday, December 3, 2021 - 11:34:02 AM
Long-term archiving on: : Monday, October 15, 2012 - 3:27:35 PM

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  • HAL Id : tel-00404354, version 1

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Jérôme Faure. Accélération de particules par interaction laser-plasma dans le régime relativiste. Physique [physics]. Université Paris Sud - Paris XI, 2009. ⟨tel-00404354⟩

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