Multiple cutoff wave numbers of the ablative Rayleigh-Taylor instability

Journal Article · Tue Nov 01 00:00:00 EST 1994 · Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States)

DOI:https://doi.org/10.1103/PhysRevE.50.3968· OSTI ID:6846629

Betti, R; Goncharov, V; McCrory, R L; Turano, E; Verdon, C P ^[1]

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1. Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623-1299 (United States) Department of Mechanical Engineering, University of Rochester, Rochester, New York 14623-1299 (United States)

The cutoff wave number of the incompressible ablative Rayleigh-Taylor instability is calculated using the physical optics approximation of the Wentzel-Kramers-Brillouin theory. It is found that a single value of the wave number [ital k] can correspond to multiple modes with different eigenfunctions and growth rates [gamma]. In the [gamma]-[ital k] plane the unstable spectrum is characterized by multiple branches with different cutoff wave numbers, and eigenfunctions with different number of zeros. The theory provides a formula for the cutoff wave number, valid in the regimes of interest for inertial confinement fusion capsules.

• OSTI ID: 6846629
• Journal Information: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States), Vol. 50:5; ISSN 1063-651X
• Country of Publication: United States
• Language: English

Related Subjects

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RAYLEIGH-TAYLOR INSTABILITY
ABLATION
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WAVE PROPAGATION
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