Impact of void defects on layered implosions

Meteors of emission arise from the growth of capsule perturbations and can inhibit yield amplification. High Z particulates, surface pits and internal voids have been identified as meteors seeds. Meteors of emission may also be caused by growth of inherent seeds at unstable interfaces. In conjunction, the metrology and calculations indicate that in nano-crystaline HDC, both pits and voids can inject ablator material. In this presentation we analyse how the void perturbation lead to the generation of meteors in NIF implosions, we investigate the dependence of the injected mass in function of void volume and depth and finally we show how the interaction between multiple void perturbation act like en effective roughness.