"Shear properties." . . "NAVAL RESEARCH LAB WASHINGTON DC." . . "Ablation." . . "Laser target interactions." . . "Spikes." . . "Nonlinear analysis." . . "Lasers and Masers." . . "Fluid dynamics." . . "Acceleration." . . "Hydrodynamics." . . . . . . . . . . . . . . "The Rayleigh-Taylor and Kelvin-Helmholtz Instabilites in Targets Accelerated by Laser Ablation"@en . . . . . . . "Using the FAST2D laser-shell simulation model we have accelerated a 20 micrometer thick plastic foil up to 160 km/s. The foil maintained its integrity up to 10 ns giving an aspect ratio of 40. We are able to follow the Rayleigh-Taylor bubble-and-spike development far into the nonlinear regime and beyond the point of foil fragmentation. Strong shear flow develops at the interface between the bubble-and-spike which leads to the development of the Kelvin-Helmholtz instability. The K-H instability causes the tips of the spikes to widen and as a result reduce their rate of 'fall.' (Author)."@en . . "Taylors series." . . "Plasmas(physics)" . . . . "Equations of motion." . . "Rayleigh scattering." . .