Matter and Radiation at Extremes, Volume. 6, Issue 5, 056901(2021)
Enhanced ion acceleration using the high-energy petawatt PETAL laser
Fig. 1. Focal spot measured after the compression stage in high-energy shot #176 (450 J energy and 610 fs duration).
Fig. 2. T
Fig. 3. Experimental setup and positioning of diagnostics within the LMJ chamber (angles are relative to the PETAL laser beam direction).
Fig. 4. Electron energy spectra measured at 13.5° and 58.5° from the rear target normal by SESAME on shot #176.
Fig. 5. Electron energy spectra measured at 13.5° by SESAME on shots #176, #177, and #178.
Fig. 6. Thomson parabola traces (high-energy SEPAGE channel) obtained on an MS imaging plate in shot #176: 450 J/610 fs laser pulse on a 50
Fig. 8. Comparison of proton spectra obtained on the SEPAGE Thomson parabola and RCF stacks for shot #176, #177, and #178.
Fig. 9. (a) RCF images (EBT3) due to protons obtained in shot #176: 450 J/610 fs on a 50
Fig. 10. PETAL prepulse contrast (ratio of intensity to peak intensity): long-term (5 ns) and short-term (in the inset, >250 ps) before the main pulse.
Fig. 11. (a) Lineout of electron density (cm−3) along the laser propagation axis for two different laser energies (the inset shows a zoom of the dashed rectangle), just before the arrival of the main PETAL pulse. The laser is coming from the left side, and the target was initially located between the positions 142 and 192
Fig. 12. Average laser amplitude distribution in the preplasma at
Fig. 13. Evolution of the spatially resolved energy distribution of electrons with time (
Fig. 14. Distribution of the electrons with
Fig. 15. Proton spectra obtained at
Fig. 16. Density of fast ions obtained at the end of the simulation (3.1 ps), just before that the fastest protons reach the boundary of the simulation box. (a) Proton and (b) C6+ density maps. (c) Longitudinal and (d) transverse electric fields, averaged over the laser period 2π/ω0.
Fig. 17. Data obtained at the end of the simulation (3.1 ps). (a) Distribution of proton energy (>8 MeV) as a function of position
Fig. 18. Comparison of the proton spectra simulated with CALDER-CIRC and the experimental data for shot #176. In CALDER-CIRC, the protons emitted in a cone with a half-angle of 10° were used to compute the average spectrum over the corresponding solid angle.
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D. Raffestin, L. Lecherbourg, I. Lantuéjoul, B. Vauzour, P. E. Masson-Laborde, X. Davoine, N. Blanchot, J. L. Dubois, X. Vaisseau, E. d’Humières, L. Gremillet, A. Duval, Ch. Reverdin, B. Rosse, G. Boutoux, J. E. Ducret, Ch. Rousseaux, V. Tikhonchuk, D. Batani. Enhanced ion acceleration using the high-energy petawatt PETAL laser[J]. Matter and Radiation at Extremes, 2021, 6(5): 056901
Category: Radiation and Hydrodynamics
Received: Feb. 5, 2021
Accepted: Jul. 18, 2021
Published Online: Oct. 19, 2021
The Author Email: Raffestin D. (didier.raffestin@u-bordeaux.fr)