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Sources de particules de hautes énergies obtenues avec des lasers intenses pour applications à la physique nucléaire

Abstract : This experimental study concerns the characterization of the beams of electrons and protons with energies above a few MeV produced in the interaction of an ultra-intense (~10^19 W.cm-2) laser beam with a 10 µm thick solid target.
This work was issued in the framework to use these beams in nuclear physics experiments. It was hence necessary to know quantitatively the characteristics of these particle beams.
Laser accelerated particle beams have very different characteristics from conventional accelerators' ones, especially on account of their transience and intensity as well as their continuous energy distribution. These properties make their characterization complex and led us to develop methods combining measurements with diodes spectrometers, radiochromic films, nuclear activation of chosen materials and Monte-Carlo simulations.
These methods have been employed on two different facilities (LOA Salle Jaune in Palaiseau and JETI at the IOQ in Jena) but with similar characteristics for the study of the electron beams as a function of the target material. An experiment was also carried out to characterize at each shot the proton beam produced with the LULI 100 TW laser facility (Palaiseau). This experiment also proved the possibility to induce nuclear reactions in plasma and to measure quantitatively the reaction rate in order to scale an experiment on the perturbation of the nucleus electronic-shells coupling via a strong electromagnetic field due to the laser.
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https://tel.archives-ouvertes.fr/tel-00269852
Contributor : Mathias Gerbaux <>
Submitted on : Thursday, April 3, 2008 - 10:03:57 AM
Last modification on : Thursday, January 11, 2018 - 6:12:51 AM
Long-term archiving on: : Thursday, May 20, 2010 - 10:53:35 PM

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  • HAL Id : tel-00269852, version 1

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Mathias Gerbaux. Sources de particules de hautes énergies obtenues avec des lasers intenses pour applications à la physique nucléaire. Physique Nucléaire Théorique [nucl-th]. Université Sciences et Technologies - Bordeaux I, 2007. Français. ⟨tel-00269852⟩

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