Richtmyer–Meshkov Instability Reshock Experiments Using Laser-Driven Double-Cylinder Implosions |
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Authors: | J. M. Taccetti S. H. Batha J. R. Fincke N. D. Delamater N. E. Lanier G. R. Magelssen R. M. Hueckstaedt S. D. Rothman C. J. Horsfield K. W. Parker |
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Affiliation: | (1) Los Alamos National Laboratory, Los Alamos, USA;(2) Atomic Weapons Establishment Plc, Aldermaston, UK |
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Abstract: | As a shock travels through the interface between substances of different densities, existing perturbations can grow via the Richtmyer–Meshkov (RM) instability. The study of the RM instability in a convergent geometry leads to a better understanding of implosions applicable to inertial confinement fusion and various astrophysical events, such as core-collapse supernovae. We present results of laser-driven double-cylinder implosions performed at the Omega laser facility with an emphasis on sending a second shock through an already shocked RM unstable interface. The uniform reshock of a cylindrical interface is achieved by inserting a second cylinder inside the first that reflects the inwardly traveling shock and causes it to interact a second time with the unstable interface. We present an analysis of the instability growth as a function of shock strength and zero-order perturbation behavior during reshock. |
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Keywords: | Richtmyer– Meshkov cylindrical implosion experiment simulation |
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