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Proceedings Paper

Investigations into compressible turbulent mix in a convergent geometry plasma environment
Author(s): 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
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Paper 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.

Paper Details

Date Published: 12 December 2003
PDF: 7 pages
Proc. SPIE 5228, ECLIM 2002: 27th European Conference on Laser Interaction with Matter, (12 December 2003); doi: 10.1117/12.534289
Show Author Affiliations
Kenneth W. Parker, Atomic Weapons Establishment plc (United Kingdom)
Steve D. Rothman, Atomic Weapons Establishment plc (United Kingdom)
Colin Horsfield, Atomic Weapons Establishment plc (United Kingdom)
Mike Dunne, Atomic Weapons Establishment plc (United Kingdom)
David Youngs, Atomic Weapons Establishment plc (United Kingdom)
Steve Batha, Los Alamos National Lab. (United States)
Nick E. Lanier, Los Alamos National Lab. (United States)
Matt Balkey, Los Alamos National Lab. (United States)
Christopher W. Barnes, Los Alamos National Lab. (United States)
Glenn Magelsenn, Los Alamos National Lab. (United States)
Norm Delameter, Los Alamos National Lab. (United States)


Published in SPIE Proceedings Vol. 5228:
ECLIM 2002: 27th European Conference on Laser Interaction with Matter
Oleg N. Krokhin; Sergey Yu. Gus'kov; Yury A. Merkul'ev, Editor(s)

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