Comprehensive Diagnosis of Growth Rates of the Ablative Rayleigh-Taylor Instability

Journal Article · Fri Jan 26 00:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.98.045002· OSTI ID:20861646

Azechi, H; Sakaiya, T; Fujioka, S; Tamari, Y; Otani, K; Shigemori, K; Nakai, M; Shiraga, H; Miyanaga, N; Mima, K ^[1]

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1. Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871 (Japan)

The growth rate of the ablative Rayleigh-Taylor instability is approximated by {gamma}={radical}(kg/(1+kL))-{beta}km/{rho}{sub a}, where k is the perturbation wave number, g the gravity, L the density scale length, m the mass ablation rate, and {rho}{sub a} the peak target density. The coefficient {beta} was evaluated for the first time by measuring all quantities of this formula except for L, which was taken from the simulation. Although the experimental value of {beta}=1.2{+-}0.7 at short perturbation wavelengths is in reasonably good agreement with the theoretical prediction of {beta}=1.7, it is found to be larger than the prediction at long wavelengths.

• OSTI ID: 20861646
• Journal Information: Physical Review Letters, Vol. 98, Issue 4; Other Information: DOI: 10.1103/PhysRevLett.98.045002; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABLATION
GRAVITATION
MASS
PERTURBATION THEORY
PLASMA DIAGNOSTICS
RAYLEIGH-TAYLOR INSTABILITY
SIMULATION
WAVELENGTHS