Suppression of hydrodynamic instabilities in laser ablated thin solid traget - an experimental study

摘要

One of the major impediments to achieving stable abative acceleration in laser induced inertial confinement fusionis the Rayleigh-Taylor (R-T) instability. Owing to laser induced high presure, the R-T instability grows at the interface of the accelerated low density coronal plasma and high density DT filled shell fluid. The aim of the experimental work presented in the paper is to study the growth of the hydrodynamic instability in laser irradiated targets at moderate intensities. Laser (1.06 umm) radiation was focused on the plastic (base) had a planar geometry and were of few micrometres in thickness. The target stability was studied had a planar geometry and were of few micrometres in thickness. The target stability was studied using an optical backlighting technique. The results are analysed by considering the coherent structure effects of plasma such as vortices, self-generated magnetic field in the accelerated target and non-linear conversion flong wavelength perturbation into short wavelength perturbation.