Feedout coupling of Richtmyer{endash}Meshkov and Rayleigh{endash}Taylor instabilities in stratified, radiation-driven foils
- P.O. Box 1663, MS F664, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- P.O. Box 1663, MS D410, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- P.O. Box 1663, MS F663, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- P.O. Box 1663, MS B220, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
Coupling between Richtmyer{endash}Meshkov- and Rayleigh{endash}Taylor-unstable surfaces of indirectly driven, stratified, planar foils composed of an aluminum ablator and a beryllium payload carrying a machined initial perturbation was studied using radiographic techniques. The beryllium was transparent to the x-ray backlighter, allowing clear observation of the perturbation transport into the aluminum. The maximum perturbation amplitude (areal{endash}mass difference) was smaller in the aluminum/beryllium foils than in equivalent pure aluminum foils, which could have been the result of shorter growth time, a lower differential acceleration coupling, or the density discontinuity at the aluminum/beryllium interface. Second and third harmonics were not observed in the composite foils. {copyright} {ital 1999 American Institute of Physics.}
- OSTI ID:
- 321501
- Journal Information:
- Physics of Plasmas, Vol. 6, Issue 3; Other Information: PBD: Mar 1999
- Country of Publication:
- United States
- Language:
- English
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