| 1 | Multibeam laser-plasma interaction at the Gekko XII laser facility in conditions relevant for direct-drive inertial confinement fusion显示文摘Laser–plasma interaction and hot electrons have been characterized in detail in laser irradiation conditions relevant for direct-drive inertial confinement fusion.The experiment was carried out at the Gekko XII laser facility in multibeam planar target geometry at an intensity of approximately 3×10^(15)W/cm^(2).Experimental data suggest that high-energy electrons,with temperatures of 20–50 keV and conversion efficiencies ofη<1%,were mainly produced by the damping of electron plasma waves driven by two-plasmon decay(TPD).Stimulated Raman scattering(SRS)is observed in a near-threshold growth regime,producing a reflectivity of approximately 0.01%,and is well described by an analytical model accounting 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. | G.Cristoforetti P.Koester S.Atzeni D.Batani S.Fujioka Y.Hironaka S.Hüller T.Idesaka K.Katagiri K.Kawasaki R.Kodama D.Mancelli Ph.Nicolai N.Ozaki A.Schiavi K.Shigemori R.Takizawa T.Tamagawa D.Tanaka A.Tentori Y.Umeda A.Yogo L.A.Gizzi | 2023 | High Power Laser Science and Engineering2023，11，2： | 0 |
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