Surface perturbation target for the Rayleigh-Taylor instability in inertial-confinement fusion experiments

A preparation process of a surface perturbation target was introduced in th is article. Through laser interference and a nickel-electroplate process, s inusoidal surface perturbation on the photoresist and nickel plate mold wit h sinusoidal surface perturbation were obtained. We transferred sinusoidal perturbation on brominated polystyrene foils by a spin-coating process. By removing the brominated polystyrene foils from the nickel-plate mold, the b rominated polystyrene sinusoidal surface perturbation target was obtained. The transfer precision of the sinusoidal perturbation was measured by scann ing electron microscopy. The measurements showed that the surface perturbat ion was transferred precisely. The surface roughness on the surface perturb ation target was about 15.0 nm, analyzed by an alpha-step apparatus. (C) 19 99 American Vacuum Society. [S0734-2101(99)04906-4].