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Title: Evidence for a Bubble-Competition Regime in Indirectly Driven Ablative Rayleigh-Taylor Instability Experiments on the NIF

Abstract

In this paper, we investigate on the National Ignition Facility the ablative Rayleigh-Taylor instability in the transition from weakly nonlinear to highly nonlinear regimes. A planar plastic package with preimposed two-dimensional broadband modulations is accelerated for up to 12 ns by the x-ray drive of a gas-filled Au radiation cavity with a radiative temperature plateau at 175 eV. This extended tailored drive allows a distance traveled in excess of 1 mm for a 130 μm thick foil. Measurements of the modulation optical density performed by x-ray radiography show that a bubble-merger regime for the Rayleigh-Taylor instability at an ablation front is achieved for the first time in indirect drive. Finally, the mutimode modulation amplitudes are in the nonlinear regime, grow beyond the Haan multimode saturation level, evolve toward the longer wavelengths, and show insensitivity to the initial conditions.

Authors:
 [1];  [1];  [1];  [2];  [2];  [2]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Alternative Energies and Atomic Energy Commission (CEA), Arpajon (France)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1376014
Alternate Identifier(s):
OSTI ID: 1193895
Report Number(s):
LLNL-JRNL-670326
Journal ID: ISSN 0031-9007
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 114; Journal Issue: 21; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Martinez, D. A., Smalyuk, V. A., Kane, J. O., Casner, A., Liberatore, S., and Masse, L. P. Evidence for a Bubble-Competition Regime in Indirectly Driven Ablative Rayleigh-Taylor Instability Experiments on the NIF. United States: N. p., 2015. Web. doi:10.1103/PhysRevLett.114.215004.
Martinez, D. A., Smalyuk, V. A., Kane, J. O., Casner, A., Liberatore, S., & Masse, L. P. Evidence for a Bubble-Competition Regime in Indirectly Driven Ablative Rayleigh-Taylor Instability Experiments on the NIF. United States. https://doi.org/10.1103/PhysRevLett.114.215004
Martinez, D. A., Smalyuk, V. A., Kane, J. O., Casner, A., Liberatore, S., and Masse, L. P. 2015. "Evidence for a Bubble-Competition Regime in Indirectly Driven Ablative Rayleigh-Taylor Instability Experiments on the NIF". United States. https://doi.org/10.1103/PhysRevLett.114.215004. https://www.osti.gov/servlets/purl/1376014.
@article{osti_1376014,
title = {Evidence for a Bubble-Competition Regime in Indirectly Driven Ablative Rayleigh-Taylor Instability Experiments on the NIF},
author = {Martinez, D. A. and Smalyuk, V. A. and Kane, J. O. and Casner, A. and Liberatore, S. and Masse, L. P.},
abstractNote = {In this paper, we investigate on the National Ignition Facility the ablative Rayleigh-Taylor instability in the transition from weakly nonlinear to highly nonlinear regimes. A planar plastic package with preimposed two-dimensional broadband modulations is accelerated for up to 12 ns by the x-ray drive of a gas-filled Au radiation cavity with a radiative temperature plateau at 175 eV. This extended tailored drive allows a distance traveled in excess of 1 mm for a 130 μm thick foil. Measurements of the modulation optical density performed by x-ray radiography show that a bubble-merger regime for the Rayleigh-Taylor instability at an ablation front is achieved for the first time in indirect drive. Finally, the mutimode modulation amplitudes are in the nonlinear regime, grow beyond the Haan multimode saturation level, evolve toward the longer wavelengths, and show insensitivity to the initial conditions.},
doi = {10.1103/PhysRevLett.114.215004},
url = {https://www.osti.gov/biblio/1376014}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 21,
volume = 114,
place = {United States},
year = {Fri May 29 00:00:00 EDT 2015},
month = {Fri May 29 00:00:00 EDT 2015}
}

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Cited by: 33 works
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Works referencing / citing this record:

Ablative stabilization of Rayleigh-Taylor instabilities resulting from a laser-driven radiative shock
journal, May 2018


Turbulent mixing and transition criteria of flows induced by hydrodynamic instabilities
journal, August 2019


Status of NIF laser and high power laser research at LLNL
conference, February 2017