Observation and simulation of plasma mix after reshock in a convergent geometry

Parker, Kenneth; Horsfield, C. J.; Rothman, S. D.; Batha, S. H.; Balkey, M. M.; Delamater, N. D.; Fincke, J. R.; Hueckstaedt, R. M.; Lanier, N. E.; Magelssen, G. R.

doi:10.1063/1.1647131

Cited by 10 publications

(1 citation statement)

References 34 publications

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“…The external comes from back-pressure exerted by vapor plume or plasma onto the molten surface and can cause different types of instabilities, known from literature, e.g. Kelvin-Helmholtz, Rayleigh-Taylor and Richtmyer-Meshkov [5][6][7]. Any modification caused by instabilities remains frozen on the surface after ablation due to very high-cooling rates.…”

Section: Introductionmentioning

confidence: 98%

UV N2 laser ablation of a Cu–Sn–Zn–Pb alloy: Microstructure and topography studied by focused ion beam

Zupanič

Bončina

Pipić

et al. 2008

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 98%

UV N2 laser ablation of a Cu–Sn–Zn–Pb alloy: Microstructure and topography studied by focused ion beam

Zupanič

Bončina

Pipić

et al. 2008

Journal of Alloys and Compounds

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Richtmyer-Meshkov Instability Reshock Experiments Using Laser-Driven Double-Cylinder Implosions

Taccetti

Batha

Fincke

et al.

High Energy Density Laboratory Astrophysics

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Los Alamos National Laboratory, an aff irmative actionlequal opportunity employer, is operated by the University of California for the US. Department of Energy under contract W-7405-ENG-36. By acceptance of this article, the publisher recognizes that the US. Government retains a nonexclusive, royalty-free license to publish or reproduce the published form of this contribution, or to allow others to do so, for US. Government purposes. Los Alamos National Laboratory requests that the publisher identify this article as work performed under the auspices of the US. Department of Energy. Los Alamos National Laboratory strongly supports academic freedom and a researcher's right to publish; as an institution, however, the Laboratory does not endorse the viewpoint of a publication or guarantee its technical correctness.

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Richtmyer–Meshkov Instability Reshock Experiments Using Laser-Driven Double-Cylinder Implosions

Taccetti

Batha

Fincke

et al. 2005

Astrophys Space Sci

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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. Richtmyer-Meshkov Instability Reshock and Astrophysical ProcessesThe Richtmyer-Meshkov instability (RMI) drives the growth of perturbations at the interface between different substances when a shock travels through it, regardless of whether the shock is traveling from a heavier to a lighter medium or vice versa. It promotes turbulence and mixing of the materials at either side of this interface. The RMI has relevance for a broad range of topics, including many astrophysical processes, such as RMI-induced mixing during the explosion phase of core-collapse (Type II) SNe, shock waves generated by SNe interacting with compressed ISM or denser molecular clouds, vortex formation in ISM (which may affect evolution scenarios of stars and structure formation in nebulae), morphology of SNe remnants (e.g. Cygnus Loop), and shock-clump interaction (Takabe, 2001). Any of these processes could experience reshock as well. Reshock occurs when a second shock travels through an already shocked interface.We study RMI reshock in cylindrical geometry, which includes convergent effects such as those seen in many astrophysical systems, but is still 2D and therefore simpler to diagnose, model, and interpret than fully 3D spherical geometry. This

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Observation and simulation of plasma mix after reshock in a convergent geometry

Cited by 10 publications

References 34 publications

UV N2 laser ablation of a Cu–Sn–Zn–Pb alloy: Microstructure and topography studied by focused ion beam

UV N2 laser ablation of a Cu–Sn–Zn–Pb alloy: Microstructure and topography studied by focused ion beam

Richtmyer-Meshkov Instability Reshock Experiments Using Laser-Driven Double-Cylinder Implosions

Richtmyer–Meshkov Instability Reshock Experiments Using Laser-Driven Double-Cylinder Implosions

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