Formation of Initial Perturbation of Rayleigh‐Taylor Instability in Supernovae and Laser‐irradiated Targets—Is There Any Similarity?

Abstract

It is suggested that the formation of initial hydrodynamic perturbation in the early phase of supernova explosions is analogous to the initial "" imprint ÏÏ process of laser nonuniformity on a target for inertial conÐnement fusion. If the radiation pressure in supernovae is spatially nonuniform due possible to nonuniform neutrino heating, the interface between the early bubble and the envelope will be deformed, resulting in a seed of the Rayleigh-Taylor instability and convection. When laser light is Ðrst applied on a target, nonuniformity in laser irradiation is "" imprinted ÏÏ on the surface, which then set the initial perturbation of the subsequent Rayleigh-Taylor instability. We will review a reasonably simple imprint model, test it in the laser experiments, and apply it on the supernova process. If this analogy is correct, the velocity perturbation may be signiÐcantly increased compared with a secular distortion due to the pressure nonuniformity.