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Title: A platform for studying the Rayleigh–Taylor and Richtmyer–Meshkov instabilities in a planar geometry at high energy density at the National Ignition Facility

Abstract

A new experimental platform has been developed at the National Ignition Facility (NIF) for studying the Rayleigh–Taylor (RT) and Richtmyer–Meshkov (RM) instabilities in a planar geometry at high-energy-densities. The platform uses 60 beams of the NIF laser to drive an initially solid shock tube containing a pre-machined interface between dense and light materials. The strong shock turns the initially solid target into a plasma and the material boundary into a fluid interface with the imprinted initial condition. The interface evolves by action of the RT and RM instabilities, and the growth is imaged with backlit x-ray radiography. We present our first data involving sinusoidal interface perturbations driven from the heavy side to the light side. Late-time radiographic images show the initial conditions reaching the deeply nonlinear regime, and an evolution of fine structure consistent with a transition to turbulence. Lastly, we show preliminary comparisons with post-shot numerical simulations and discuss the implications for future campaigns.

Authors:
ORCiD logo [1];  [1]; ORCiD logo [1];  [1];  [1];  [1];  [1]; ORCiD logo [1]; ORCiD logo [1];  [1];  [1];  [2]; ORCiD logo [3];  [1];  [2]; ORCiD logo [3]; ORCiD logo [1];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. General Atomics, San Diego, CA (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP) (NA-10)
OSTI Identifier:
1485388
Alternate Identifier(s):
OSTI ID: 1367932; OSTI ID: 1497315
Report Number(s):
LA-UR-18-22074; LLNL-JRNL-722090
Journal ID: ISSN 1070-664X
Grant/Contract Number:  
89233218CNA000001; AC52-06NA25396; AC52-07NA27344; NA0001808
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; Journal Issue: 7; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Physics

Citation Formats

Nagel, S. R., Raman, K. S., Huntington, C. M., MacLaren, S. A., Wang, P., Barrios, M. A., Baumann, T., Bender, J. D., Benedetti, L. R., Doane, D. M., Felker, S., Fitzsimmons, P., Flippo, K. A., Holder, J. P., Kaczala, D. N., Perry, T. S., Seugling, R. M., Savage, L., and Zhou, Y. A platform for studying the Rayleigh–Taylor and Richtmyer–Meshkov instabilities in a planar geometry at high energy density at the National Ignition Facility. United States: N. p., 2017. Web. doi:10.1063/1.4985312.
Nagel, S. R., Raman, K. S., Huntington, C. M., MacLaren, S. A., Wang, P., Barrios, M. A., Baumann, T., Bender, J. D., Benedetti, L. R., Doane, D. M., Felker, S., Fitzsimmons, P., Flippo, K. A., Holder, J. P., Kaczala, D. N., Perry, T. S., Seugling, R. M., Savage, L., & Zhou, Y. A platform for studying the Rayleigh–Taylor and Richtmyer–Meshkov instabilities in a planar geometry at high energy density at the National Ignition Facility. United States. doi:10.1063/1.4985312.
Nagel, S. R., Raman, K. S., Huntington, C. M., MacLaren, S. A., Wang, P., Barrios, M. A., Baumann, T., Bender, J. D., Benedetti, L. R., Doane, D. M., Felker, S., Fitzsimmons, P., Flippo, K. A., Holder, J. P., Kaczala, D. N., Perry, T. S., Seugling, R. M., Savage, L., and Zhou, Y. Wed . "A platform for studying the Rayleigh–Taylor and Richtmyer–Meshkov instabilities in a planar geometry at high energy density at the National Ignition Facility". United States. doi:10.1063/1.4985312. https://www.osti.gov/servlets/purl/1485388.
@article{osti_1485388,
title = {A platform for studying the Rayleigh–Taylor and Richtmyer–Meshkov instabilities in a planar geometry at high energy density at the National Ignition Facility},
author = {Nagel, S. R. and Raman, K. S. and Huntington, C. M. and MacLaren, S. A. and Wang, P. and Barrios, M. A. and Baumann, T. and Bender, J. D. and Benedetti, L. R. and Doane, D. M. and Felker, S. and Fitzsimmons, P. and Flippo, K. A. and Holder, J. P. and Kaczala, D. N. and Perry, T. S. and Seugling, R. M. and Savage, L. and Zhou, Y.},
abstractNote = {A new experimental platform has been developed at the National Ignition Facility (NIF) for studying the Rayleigh–Taylor (RT) and Richtmyer–Meshkov (RM) instabilities in a planar geometry at high-energy-densities. The platform uses 60 beams of the NIF laser to drive an initially solid shock tube containing a pre-machined interface between dense and light materials. The strong shock turns the initially solid target into a plasma and the material boundary into a fluid interface with the imprinted initial condition. The interface evolves by action of the RT and RM instabilities, and the growth is imaged with backlit x-ray radiography. We present our first data involving sinusoidal interface perturbations driven from the heavy side to the light side. Late-time radiographic images show the initial conditions reaching the deeply nonlinear regime, and an evolution of fine structure consistent with a transition to turbulence. Lastly, we show preliminary comparisons with post-shot numerical simulations and discuss the implications for future campaigns.},
doi = {10.1063/1.4985312},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 7,
volume = 24,
place = {United States},
year = {2017},
month = {7}
}

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Figures / Tables:

Figure 1 Figure 1: (a) Shock tube target depicted with the drive hal- fraums, ducial and big area backlighter. (b) Exploded view of the target package.

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