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

Abstract

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.

Authors:
; ; ; ; ; ; ; ; ;  [1]
  1. Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871 (Japan)
Publication Date:
OSTI Identifier:
20861646
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevLett.98.045002; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABLATION; GRAVITATION; MASS; PERTURBATION THEORY; PLASMA DIAGNOSTICS; RAYLEIGH-TAYLOR INSTABILITY; SIMULATION; WAVELENGTHS

Citation Formats

Azechi, H., Sakaiya, T., Fujioka, S., Tamari, Y., Otani, K., Shigemori, K., Nakai, M., Shiraga, H., Miyanaga, N., and Mima, K. Comprehensive Diagnosis of Growth Rates of the Ablative Rayleigh-Taylor Instability. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.045002.
Azechi, H., Sakaiya, T., Fujioka, S., Tamari, Y., Otani, K., Shigemori, K., Nakai, M., Shiraga, H., Miyanaga, N., & Mima, K. Comprehensive Diagnosis of Growth Rates of the Ablative Rayleigh-Taylor Instability. United States. doi:10.1103/PHYSREVLETT.98.045002.
Azechi, H., Sakaiya, T., Fujioka, S., Tamari, Y., Otani, K., Shigemori, K., Nakai, M., Shiraga, H., Miyanaga, N., and Mima, K. Fri . "Comprehensive Diagnosis of Growth Rates of the Ablative Rayleigh-Taylor Instability". United States. doi:10.1103/PHYSREVLETT.98.045002.
@article{osti_20861646,
title = {Comprehensive Diagnosis of Growth Rates of the Ablative Rayleigh-Taylor Instability},
author = {Azechi, H. and Sakaiya, T. and Fujioka, S. and Tamari, Y. and Otani, K. and Shigemori, K. and Nakai, M. and Shiraga, H. and Miyanaga, N. and Mima, K.},
abstractNote = {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.},
doi = {10.1103/PHYSREVLETT.98.045002},
journal = {Physical Review Letters},
number = 4,
volume = 98,
place = {United States},
year = {Fri Jan 26 00:00:00 EST 2007},
month = {Fri Jan 26 00:00:00 EST 2007}
}