A scheme using high-Z doping of the ablator to suppress the Rayleigh-Taylor (RT) instability in direct-drive inertial fusion energy (IFE), that results in radiative ablation driven by self-emitted radiation was described. The RT instability was stabilized by the large ablation velocity and the long density scale length due to the radiation drive. The RT suppression mechanism was confirmed by the comparison between theoretical predictions and two-dimensional (2D) simulation. The results show that the high-Z doping ablator is applicable to high density cryogenic DD and DT implosions, as the hydrogen isotopes are transparent to x rays, which transmit through the ablator from the laser-irradiation side.
ASJC Scopus subject areas
- Condensed Matter Physics