Multimode seeded Richtmyer–Meshkov mixing in a convergent, compressible, miscible plasma system
| Autor: | A. M. Dunne, Glenn R. Magelssen, S. D. Rothman, J. M. Scott, K. W. Parker, Nick Lanier, Steven H. Batha, Cris W. Barnes, R. D. Day |
|---|---|
| Rok vydání: | 2003 |
| Předmět: | |
| Zdroj: | Physics of Plasmas. 10:1816-1821 |
| ISSN: | 1089-7674 1070-664X |
| DOI: | 10.1063/1.1542886 |
| Popis: | Richtmyer–Meshkov (RM) mixing seeded by multimode initial surface perturbations in a convergent, compressible, miscible plasma system is measured on the OMEGA [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)] laser system. A strong shock (Mach 12–20), created by 50 laser beams, is used to accelerate impulsively a thin aluminum shell into a lower density foam. As the system converges, both interfaces of the aluminum are RM unstable and undergo mixing. Standard x-ray radiographic techniques are employed to survey accurately the zero-order hydrodynamics, the average radius and overall width, of the marker. LASNEX [G. B. Zimmerman et al., Comments on Plasma Physics 2, 51 (1975)] simulations are consistent with the zero-order behavior of initially smooth markers. In experiments with smooth aluminum markers, the measured marker width shortly after shock passage behaves incompressibly and thickens due to Bell–Plesset effects. At high convergence (>4), the marker begins to compress as the rebounding shock passe... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|