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Title: Bubble Acceleration in the Ablative Rayleigh-Taylor Instability

Abstract

The highly nonlinear evolution of the single-mode Rayleigh-Taylor instability (RTI) at the ablation front of an accelerated target is investigated in the parameter range typical of inertial confinement fusion implosions. A new phase of the nonlinear bubble evolution is discovered. After the linear growth phase and a short constant-velocity phase, it is found that the bubble is accelerated to velocities well above the classical value. This acceleration is driven by the vorticity accumulation inside the bubble resulting from the mass ablation adn vorticity convection off the ablation front. While the albative growth rates are slower than their classical values in the linear regime, the ablative RTI grows faster than the classical RTI in the nonlinear regime for deuterium and tritium ablators.

Authors:
;
Publication Date:
Research Org.:
Laboratory for Laser Energetics, University of Rochseter
Sponsoring Org.:
USDOE
OSTI Identifier:
895299
Report Number(s):
DOE/SF/19460-708
1670; 2006-44
DOE Contract Number:  
FC52-92SF19460
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 97
Country of Publication:
United States
Language:
English

Citation Formats

Betti, R, and Sanz, J. Bubble Acceleration in the Ablative Rayleigh-Taylor Instability. United States: N. p., 2006. Web. doi:10.1103/PhysRevLett.97.205002.
Betti, R, & Sanz, J. Bubble Acceleration in the Ablative Rayleigh-Taylor Instability. United States. https://doi.org/10.1103/PhysRevLett.97.205002
Betti, R, and Sanz, J. 2006. "Bubble Acceleration in the Ablative Rayleigh-Taylor Instability". United States. https://doi.org/10.1103/PhysRevLett.97.205002.
@article{osti_895299,
title = {Bubble Acceleration in the Ablative Rayleigh-Taylor Instability},
author = {Betti, R and Sanz, J},
abstractNote = {The highly nonlinear evolution of the single-mode Rayleigh-Taylor instability (RTI) at the ablation front of an accelerated target is investigated in the parameter range typical of inertial confinement fusion implosions. A new phase of the nonlinear bubble evolution is discovered. After the linear growth phase and a short constant-velocity phase, it is found that the bubble is accelerated to velocities well above the classical value. This acceleration is driven by the vorticity accumulation inside the bubble resulting from the mass ablation adn vorticity convection off the ablation front. While the albative growth rates are slower than their classical values in the linear regime, the ablative RTI grows faster than the classical RTI in the nonlinear regime for deuterium and tritium ablators.},
doi = {10.1103/PhysRevLett.97.205002},
url = {https://www.osti.gov/biblio/895299}, journal = {Physical Review Letters},
number = ,
volume = 97,
place = {United States},
year = {Mon Nov 20 00:00:00 EST 2006},
month = {Mon Nov 20 00:00:00 EST 2006}
}