# 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:

- 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}

}

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