Abstract
Shock-ignition experiments with peak laser intensities of ∼8 × 1015 W/cm2 were performed. D2 -filled plastic shells were compressed on a low adiabat by 40 of the 60 OMEGA beams. The remaining 20 beams were delayed and tightly focused onto the imploding shell to generate a strong shock. Up to 35% backscattering of laser energy was measured at the highest intensity. Hard x-ray measurements reveal a relatively low hot-electron temperature of ∼40 keV, independent of intensity and spike onset time.
Highlights
D2-filled plastic shells were compressed on a low adiabat by 40 of the 60 OMEGA beams
Up to 35% backscattering of laser energy was measured at the highest intensity
Shock ignition (SI) is a two-step inertial confinement fusion concept in which a strong shock wave is launched at the end of the laser pulse to ignite the compressed core of a low-velocity implosion [1]
Summary
Shock ignition (SI) is a two-step inertial confinement fusion concept in which a strong shock wave is launched at the end of the laser pulse to ignite the compressed core of a low-velocity implosion [1]. Shock-ignition experiments with peak laser intensities of ∼8 × 1015 W/cm2 were performed. Up to 35% backscattering of laser energy was measured at the highest intensity.
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