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Theses

Étude du transport des électrons suprathermiques en milieu solide ou comprimé dans le cadre de l'allumeur rapide.

Abstract : The inertial confinement fusion (ICF) concept is widely studied nowadays. It consists in quickly compressing and heating a small spherical capsule filled with fuel, using extremely energetic lasers. Since approximately 15 years, the fast-ignition (FI) technique has been proposed to facilitate the fuel heating by adding a particle beam - electrons generated by an ultra-intense laser - at the exact moment when the capsule compression is at its maximum. This thesis constitutes an experimental study of these electron beams generated by picosecond-scale lasers. We present new results on the characteristics of these electrons after they are accelerated by the laser (energy, divergence, etc.) as well as their interaction with the matter they pass through. The experimental results are explained and reveal different aspects of these laser-accelerated fast electrons. Their analysis allowed for significant progress in understanding several mechanisms: how they are injected into solid matter, how to measure their divergence, and how they can be automatically collimated inside compressed matter.
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https://pastel.archives-ouvertes.fr/pastel-00556533
Contributor : Frédéric Pérez <>
Submitted on : Monday, January 17, 2011 - 10:48:43 AM
Last modification on : Friday, July 31, 2020 - 9:22:02 AM
Long-term archiving on: : Tuesday, November 6, 2012 - 11:36:48 AM

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  • HAL Id : pastel-00556533, version 1

Citation

Frédéric Pérez. Étude du transport des électrons suprathermiques en milieu solide ou comprimé dans le cadre de l'allumeur rapide.. Physique des plasmas [physics.plasm-ph]. Ecole Polytechnique X, 2010. Français. ⟨pastel-00556533⟩

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