H. Azechi et al., Formation of initial perturbation of Rayleigh-Taylor instability in supernovae and laser-irradiated targets - Is there any similarity?, ASTROPH J S, 127(2), 2000, pp. 219-225
It is suggested that the formation of initial hydrodynamic perturbation in
the early phase of supernova explosions is analogous to the initial "imprin
t" process of laser nonuniformity on a target for inertial confinement fusi
on. If the radiation pressure in supernovae is spatially nonuniform due pos
sible to nonuniform neutrino heating, the interface between the early bubbl
e and the envelope will be deformed, resulting in a seed of the Rayleigh-Ta
ylor instability and convection. When laser light is first applied on a tar
get, nonuniformity in laser irradiation is "imprinted" on the surface, whic
h then set the initial perturbation of the subsequent Rayleigh-Taylor insta
bility. We will review a reasonably simple imprint model, test it in the la
ser experiments, and apply it on the supernova process. If this analogy is
correct, the velocity perturbation may be significantly increased compared
with a secular distortion due to the pressure nonuniformity.