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Journal Articles High Power Laser Science and Engineering Year : 2023

Multibeam Laser Plasma Interaction at Gekko XII laser facility in conditions relevant for Direct-Drive Inertial Confinement Fusion

Stefan Hüller
L.A. Gizzi
  • Function : relator_co_last_author

Abstract

Laser Plasma Interaction and hot electrons have been characterized in detail in laser irradiation conditions relevant for direct-drive Inertial Confinement F usion. T he e xperiment h as b een carried out at Gekko XII laser facility in multibeam planar geometry at intensity ∼ 3 • 10 15 W/cm 2. Experimental data suggest that high-energy electrons, with temperature 20-50 keV and conversion efficiencies η < 1% , we re ma inly pr oduced by th e da mping of el ectron pl asma wa ves dr iven by Two Plasmon Decay. Stimulated Raman Scattering is observed in a near-threshold growth regime, producing a reflectivity o f ∼ 0 .01%, a nd i s w ell d escribed b y a n a nalytical m odel a ccounting for the convective growth in independent speckles. The experiment reveals that both TPD and SRS are collectively driven by multiple beams resulting in a more vigorous growth than that driven by single-beam laser intensity.
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Dates and versions

hal-03997437 , version 1 (20-02-2023)

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Gabriele Cristoforetti, P. Koester, S. Atzeni, D. Batani, S. Fujioka, et al.. Multibeam Laser Plasma Interaction at Gekko XII laser facility in conditions relevant for Direct-Drive Inertial Confinement Fusion. High Power Laser Science and Engineering, 2023, 11, pp.1-11. ⟨10.1017/hpl.2023.13⟩. ⟨hal-03997437⟩
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