Feed-out of rear surface perturbation due to rarefaction wave in laser-irradiated targets
We report experimental results on hydrodynamic perturbation transfer from the rear to the front of laser-irradiated targets. Flat polystyrene foils with rear-surface perturbations were irradiated by partially coherent light. We observed phase inversion of the rear surface after the shock breakout at the rear surface. Perturbations on the laser-irradiated surface arose due to the rippled rarefaction wave. Experimental results were well reproduced by a simple model with unperturbed hydrodynamic quantities calculated from the one-dimensional simulation.
Shigemori
K
Institute of Laser Engineering, Osaka University 2-6 Yamada-Oka, Suita, Osaka, 565-0871 Japan.
Nakai
M
Azechi
H
Nishihara
K
Ishizaki
R
Nagaya
T
Nagatomo
H
Mima
K