Investigations into compressible turbulent mix in a convergent geometry plasma environment

Kenneth W. Parker; Steve D. Rothman; Colin Horsfield; Mike Dunne; David Youngs; Steve Batha; Nick E. Lanier; Matt Balkey; Christopher W. Barnes; Glenn Magelsenn; Norm Delameter

doi:10.1117/12.534289

12 December 2003 Investigations into compressible turbulent mix in a convergent geometry plasma environment

Kenneth W. Parker, Steve D. Rothman, Colin Horsfield, Mike Dunne, David Youngs, Steve Batha, Nick E. Lanier, Matt Balkey, Christopher W. Barnes, Glenn Magelsenn, Norm Delameter

Author Affiliations +

Proceedings Volume 5228, ECLIM 2002: 27th European Conference on Laser Interaction with Matter; (2003) https://doi.org/10.1117/12.534289
Event: ECLIM 2002: 27th European conference on Laser Interaction with Matter, 2002, Moscow, Russian Federation

Abstract

A suite of experiments to measure the growth of turbulent mix in a compressible, convergent geometry has been performed on the Omega laser facility at LLE, Rochester NY. These employ a radiographically opaque marker layer to set the initial conditions at the unstable interface and to provide a diagnostic of the induced density gradients. The marker is sandwiched between a plastic ablator and a low-density polystyrene foam cylinder. The implosion is driven by uniform irradiation by 50 laser beams in an impulsive acceleration mode. The ablative drive launches a strong shock, causing the marker to become mixed into both the foam and the ablator. Compressible Richtmeyer Meshkov effects, modified by Bell-Plesset instability dominate the instability growth. The dependence on initial surface roughness is studied along with the time history of the evolution.

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Kenneth W. Parker, Steve D. Rothman, Colin Horsfield, Mike Dunne, David Youngs, Steve Batha, Nick E. Lanier, Matt Balkey, Christopher W. Barnes, Glenn Magelsenn, and Norm Delameter "Investigations into compressible turbulent mix in a convergent geometry plasma environment", Proc. SPIE 5228, ECLIM 2002: 27th European Conference on Laser Interaction with Matter, (12 December 2003); https://doi.org/10.1117/12.534289

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