Enhanced ion acceleration using the high-energy petawatt PETAL laser
The high-energy petawatt PETAL laser system was commissioned at CEA’s Laser Mégajoule facility during the 2017–2018 period. This paper reports in detail on the first experimental results obtained at PETAL on energetic particle and photon generation from solid foil targets, with special emphasis on p...
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| Veröffentlicht in: | Matter Radiat.Extremes 2021-09, Vol.6 (5), p.056901-056901-18 |
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| creator | Raffestin, D. Lecherbourg, L. Lantuéjoul, I. Vauzour, B. Masson-Laborde, P. E. Davoine, X. Blanchot, N. Dubois, J. L. Vaisseau, X. d’Humières, E. Gremillet, L. Duval, A. Reverdin, Ch Rosse, B. Boutoux, G. Ducret, J. E. Rousseaux, Ch Tikhonchuk, V. Batani, D. |
| description | The high-energy petawatt PETAL laser system was commissioned at CEA’s Laser Mégajoule facility during the 2017–2018 period. This paper reports in detail on the first experimental results obtained at PETAL on energetic particle and photon generation from solid foil targets, with special emphasis on proton acceleration. Despite a moderately relativistic ( |
| doi_str_mv | 10.1063/5.0046679 |
| format | Article |
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E. ; Davoine, X. ; Blanchot, N. ; Dubois, J. L. ; Vaisseau, X. ; d’Humières, E. ; Gremillet, L. ; Duval, A. ; Reverdin, Ch ; Rosse, B. ; Boutoux, G. ; Ducret, J. E. ; Rousseaux, Ch ; Tikhonchuk, V. ; Batani, D.</creator><creatorcontrib>Raffestin, D. ; Lecherbourg, L. ; Lantuéjoul, I. ; Vauzour, B. ; Masson-Laborde, P. E. ; Davoine, X. ; Blanchot, N. ; Dubois, J. L. ; Vaisseau, X. ; d’Humières, E. ; Gremillet, L. ; Duval, A. ; Reverdin, Ch ; Rosse, B. ; Boutoux, G. ; Ducret, J. E. ; Rousseaux, Ch ; Tikhonchuk, V. ; Batani, D.</creatorcontrib><description>The high-energy petawatt PETAL laser system was commissioned at CEA’s Laser Mégajoule facility during the 2017–2018 period. This paper reports in detail on the first experimental results obtained at PETAL on energetic particle and photon generation from solid foil targets, with special emphasis on proton acceleration. Despite a moderately relativistic (<1019 W/cm2) laser intensity, proton energies as high as 51 MeV have been measured significantly above those expected from preliminary numerical simulations using idealized interaction conditions. Multidimensional hydrodynamic and kinetic simulations, taking into account the actual laser parameters, show the importance of the energetic electron production in the extended low-density preplasma created by the laser pedestal. This hot-electron generation occurs through two main pathways: (i) stimulated backscattering of the incoming laser light, triggering stochastic electron heating in the resulting counterpropagating laser beams; (ii) laser filamentation, leading to local intensifications of the laser field and plasma channeling, both of which tend to boost the electron acceleration. Moreover, owing to the large (∼100 μm) waist and picosecond duration of the PETAL beam, the hot electrons can sustain a high electrostatic field at the target rear side for an extended period, thus enabling efficient target normal sheath acceleration of the rear-side protons. 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E.</creatorcontrib><creatorcontrib>Davoine, X.</creatorcontrib><creatorcontrib>Blanchot, N.</creatorcontrib><creatorcontrib>Dubois, J. L.</creatorcontrib><creatorcontrib>Vaisseau, X.</creatorcontrib><creatorcontrib>d’Humières, E.</creatorcontrib><creatorcontrib>Gremillet, L.</creatorcontrib><creatorcontrib>Duval, A.</creatorcontrib><creatorcontrib>Reverdin, Ch</creatorcontrib><creatorcontrib>Rosse, B.</creatorcontrib><creatorcontrib>Boutoux, G.</creatorcontrib><creatorcontrib>Ducret, J. E.</creatorcontrib><creatorcontrib>Rousseaux, Ch</creatorcontrib><creatorcontrib>Tikhonchuk, V.</creatorcontrib><creatorcontrib>Batani, D.</creatorcontrib><title>Enhanced ion acceleration using the high-energy petawatt PETAL laser</title><title>Matter Radiat.Extremes</title><description>The high-energy petawatt PETAL laser system was commissioned at CEA’s Laser Mégajoule facility during the 2017–2018 period. 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This hot-electron generation occurs through two main pathways: (i) stimulated backscattering of the incoming laser light, triggering stochastic electron heating in the resulting counterpropagating laser beams; (ii) laser filamentation, leading to local intensifications of the laser field and plasma channeling, both of which tend to boost the electron acceleration. Moreover, owing to the large (∼100 μm) waist and picosecond duration of the PETAL beam, the hot electrons can sustain a high electrostatic field at the target rear side for an extended period, thus enabling efficient target normal sheath acceleration of the rear-side protons. 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This paper reports in detail on the first experimental results obtained at PETAL on energetic particle and photon generation from solid foil targets, with special emphasis on proton acceleration. Despite a moderately relativistic (<1019 W/cm2) laser intensity, proton energies as high as 51 MeV have been measured significantly above those expected from preliminary numerical simulations using idealized interaction conditions. Multidimensional hydrodynamic and kinetic simulations, taking into account the actual laser parameters, show the importance of the energetic electron production in the extended low-density preplasma created by the laser pedestal. This hot-electron generation occurs through two main pathways: (i) stimulated backscattering of the incoming laser light, triggering stochastic electron heating in the resulting counterpropagating laser beams; (ii) laser filamentation, leading to local intensifications of the laser field and plasma channeling, both of which tend to boost the electron acceleration. Moreover, owing to the large (∼100 μm) waist and picosecond duration of the PETAL beam, the hot electrons can sustain a high electrostatic field at the target rear side for an extended period, thus enabling efficient target normal sheath acceleration of the rear-side protons. 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| subjects | Accelerator Physics Physics |
| title | Enhanced ion acceleration using the high-energy petawatt PETAL laser |
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