Richtmyer-Meshkov instability reshock experiments using laser-driven double-cylinder implosions.
- Jose Martin
- Steven H.
- Norman D.
- Nicholas E.
- Glenn R.
- Robert M.
- Colin J.
- Kenneth W.
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 travelling 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.
- Research Organization:
- Los Alamos National Laboratory
- Sponsoring Organization:
- DOE
- OSTI ID:
- 977560
- Report Number(s):
- LA-UR-04-2709
- Country of Publication:
- United States
- Language:
- English
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