[Accélération laser d'ions énergétiques de faible émittance et applications]
Les sources d'ions accélérées par laser de forte puissance possèdent des propriétés exceptionnelles, c'est-à-dire une forte luminosité et une forte énergie (56 MeV à l'heure actuelle), elles sont aussi directionnelles et extrêmement laminaires (au moins 100 fois plus que les sources produites par les accélérateurs conventionnels) et ont une très courte durée d'impulsion à la source (ps). De par ces propriétés, ces sources ouvrent de nouvelles possibilités pour les applications des faisceaux d'ions. Parmi celles-ci, nous avons déjà exploré l'utilisation de la radiographie de protons à la physique des plasmas et pour la production de matière dense et chaude. Ces sources pourraient également stimuler le développement d'accélérateurs d'ions compact ou pourraient être utilisées pour des applications médicales. Pour étendre la gamme des applications potentielles, l'énergie des ions ainsi que l'efficacité de conversion laser/ions doit cependant être augmentée. Deux stratégies pour y parvenir en utilisant les lasers actuellement disponibles ont été explorées avec succès dans des expériences réalisées au LULI. Il est également essentiel de contrôler les caractéristiques de ces faisceaux. À cette fin, nous avons développé une micro-lentille plasma déclenchée par laser ultra-rapide et accordable afin de contrôler la divergence du faisceau ainsi que de le sélectionner en énergie.
Laser-accelerated ion sources have exceptional properties, i.e. high brightness and high spectral cut-off (56 MeV at present), high directionality and laminarity (at least 100-fold better than conventional accelerators beams), short burst duration (ps). Thanks to these properties, these sources open new opportunities for applications. Among these, we have already explored their use for proton radiography of fields in plasmas and for warm dense matter generation. These sources could also stimulate development of compact ion accelerators or be used for medical applications. To extend the range of applications, ion energy and conversion efficiency must however be increased. Two strategies for doing so using present-day lasers have been successfully explored in LULI experiments. In view of applications, it is also essential to control (i.e. collimate and energy select) these beams. For this purpose, we have developed an ultra-fast laser-triggered micro-lens providing tuneable control of the beam divergence as well as energy selection.
Mots-clés : Laser de puissance, Faisceau d'ions, Faisceau de faible émittance, Radiographie de protons, Matière dense et tiède
Julien Fuchs 1 ; Patrick Audebert 1 ; Marco Borghesi 2 ; Henri Pépin 3 ; Oswald Willi 4
@article{CRPHYS_2009__10_2-3_176_0,
author = {Julien Fuchs and Patrick Audebert and Marco Borghesi and Henri P\'epin and Oswald Willi},
title = {Laser acceleration of low emittance, high energy ions and applications},
journal = {Comptes Rendus. Physique},
pages = {176--187},
publisher = {Elsevier},
volume = {10},
number = {2-3},
year = {2009},
doi = {10.1016/j.crhy.2009.03.011},
language = {en},
}
TY - JOUR AU - Julien Fuchs AU - Patrick Audebert AU - Marco Borghesi AU - Henri Pépin AU - Oswald Willi TI - Laser acceleration of low emittance, high energy ions and applications JO - Comptes Rendus. Physique PY - 2009 SP - 176 EP - 187 VL - 10 IS - 2-3 PB - Elsevier DO - 10.1016/j.crhy.2009.03.011 LA - en ID - CRPHYS_2009__10_2-3_176_0 ER -
%0 Journal Article %A Julien Fuchs %A Patrick Audebert %A Marco Borghesi %A Henri Pépin %A Oswald Willi %T Laser acceleration of low emittance, high energy ions and applications %J Comptes Rendus. Physique %D 2009 %P 176-187 %V 10 %N 2-3 %I Elsevier %R 10.1016/j.crhy.2009.03.011 %G en %F CRPHYS_2009__10_2-3_176_0
Julien Fuchs; Patrick Audebert; Marco Borghesi; Henri Pépin; Oswald Willi. Laser acceleration of low emittance, high energy ions and applications. Comptes Rendus. Physique, Laser acceleration of particles in plasma, Volume 10 (2009) no. 2-3, pp. 176-187. doi : 10.1016/j.crhy.2009.03.011. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2009.03.011/
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