Investigation of longitudinal proton acceleration in exploded targets irradiated by intense short-pulse laser
| Autor: | Julien Fuchs, M. Glesser, Sophia Chen, Bruno Albertazzi, Philippe Nicolai, H. Pépin, V. T. Tikhonchuk, Patrizio Antici, C. Beaucourt, Maxence Gauthier, Jérôme Breil, Jean-Luc Feugeas, V. Dervieux, Anna Lévy, Emmanuel d'Humières |
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| Přispěvatelé: | Laboratoire pour l'utilisation des lasers intenses (LULI), Université Pierre et Marie Curie - Paris 6 (UPMC)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Institut des Nanosciences de Paris (INSP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), European Commission (CRISP) [283745], FRQNT/FRQSC [174726], CRSNG decouverte [435416], FP-7 Laserlab-Europe [602 284464, 001528], National Science Foundation [600 1064468], Aquitaine Regional Council, LULI |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Physics
Proton Plasma Condensed Matter Physics Laser 7. Clean energy 01 natural sciences 010305 fluids & plasmas Intensity (physics) law.invention Shock (mechanics) Acceleration law Physics::Plasma Physics 0103 physical sciences Physics::Accelerator Physics Plasma diagnostics Irradiation Atomic physics [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat] 010306 general physics |
| Zdroj: | Physics of Plasmas Physics of Plasmas, 2014, 21 (1), pp.013102. ⟨10.1063/1.4853475⟩ Physics of Plasmas, American Institute of Physics, 2014, 21 (1), pp.013102. ⟨10.1063/1.4853475⟩ |
| ISSN: | 1070-664X 1089-7674 |
| DOI: | 10.1063/1.4853475⟩ |
| Popis: | International audience; It was recently shown that a promising way to accelerate protons in the forward direction to high energies is to use under-dense or near-critical density targets instead of solids. Simulations have revealed that the acceleration process depends on the density gradients of the plasma target. Indeed, under certain conditions, the most energetic protons are predicted to be accelerated by a collisionless shock mechanism that significantly increases their energy. We report here the results of a recent experiment dedicated to the study of longitudinal ion acceleration in partially exploded foils using a high intensity (similar to 5 x 10(18) W/cm(2)) picosecond laser pulse. We show that protons accelerated using targets having moderate front and rear plasma gradients (up to similar to 8 mu m gradient length) exhibit similar maximum proton energy and number compared to proton beams that are produced, in similar laser conditions, from solid targets, in the well-known target normal sheath acceleration regime. Particle-In-Cell simulations, performed in the same conditions as the experiment and consistent with the measurements, allow laying a path for further improvement of this acceleration scheme. (C) 2014 AIP Publishing LLC. |
| Databáze: | OpenAIRE |
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