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Title: Development on the National Ignition Facility of a High Energy Density Opacity Platform

Abstract

X-ray opacity is a crucial factor in all radiation-hydrodynamics calculations, yet it is one of the least validated of the material properties in simulation codes for high-energy-density plasmas. Recent opacity experiments at the Sandia Z-machine have shown up to factors of two discrepancies between theory and experiment for various mid-Z elements (Fe, Cr, Ni). These discrepancies raise doubts regarding the accuracy of the opacity models which are used in ICF and stewardship as well as in astrophysics. Therefore, a new experimental opacity platform has been developed on the National Ignition Facility (NIF), not only to verify the Z-machine experimental results, but also to extend the experiments to other temperatures and densities. Within the context of the national opacity strategy, the first NIF experiments were directed towards measuring the opacity of iron at a temperature of ~160 eV and an electron density of ~7xl021 cm-3(Anchor 1). The Z data agree with theory at these conditions, providing a reference point for validation of the NIF platform. Development shots on NIF have demonstrated the ability to create a sufficiently bright point backlighter using an imploding plastic capsule, and also a combined hohlraum, sample and laser drive able to produce iron plasmas at themore » desired conditions. Spectrometer qualification has been completed, albeit with additional improvements planned, and the first iron absorption spectra have now been obtained.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2];  [2];  [2];  [2];  [2] more »;  [2];  [2];  [2];  [2];  [2];  [3];  [3];  [3];  [3];  [3];  [3];  [3];  [4];  [4];  [4];  [4];  [5];  [5];  [5] « less
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Nevada National Security Site (NNSS), NV (United States)
  4. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
  5. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1396155
Report Number(s):
LA-UR-17-28950
DOE Contract Number:
AC52-06NA25396
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; opacity experiment; iron opacity; Opacity-on-NIF

Citation Formats

Perry, Theodore Sonne, Dodd, Evan S., DeVolder, Barbara Gloria, Johns, Heather Marie, Cardenas, Tana, Archuleta, Thomas Nick, Kline, John L., Flippo, Kirk Adler, Vinyard, Natalia Sergeevna, Sherrill, Manolo Edgar, Wilde, Bernhard Heinz, Tregillis, Ian Lee, Urbatsch, Todd James, Douglas, Melissa Rae, Heeter, R. F., Liedahl, D. A., Wilson, B. G., Iglesias, C. A., Schneider, M. B., Martin, M. E., London, R. A., Ahmed, M. F., Thompson, N. B., Emig, J. A., Zika, M. R., Opachich, Y. P., King, J. A., Ross, P. W., Huffman, E. J., Knight, R. A., Koch, J. A., Pond, T. D., Craxton, R. S., Zhang, R., McKenty, P. W., Garcia, E. M., Bailey, J. E., Rochau, G. A., and Hansen, S. B.. Development on the National Ignition Facility of a High Energy Density Opacity Platform. United States: N. p., 2017. Web. doi:10.2172/1396155.
Perry, Theodore Sonne, Dodd, Evan S., DeVolder, Barbara Gloria, Johns, Heather Marie, Cardenas, Tana, Archuleta, Thomas Nick, Kline, John L., Flippo, Kirk Adler, Vinyard, Natalia Sergeevna, Sherrill, Manolo Edgar, Wilde, Bernhard Heinz, Tregillis, Ian Lee, Urbatsch, Todd James, Douglas, Melissa Rae, Heeter, R. F., Liedahl, D. A., Wilson, B. G., Iglesias, C. A., Schneider, M. B., Martin, M. E., London, R. A., Ahmed, M. F., Thompson, N. B., Emig, J. A., Zika, M. R., Opachich, Y. P., King, J. A., Ross, P. W., Huffman, E. J., Knight, R. A., Koch, J. A., Pond, T. D., Craxton, R. S., Zhang, R., McKenty, P. W., Garcia, E. M., Bailey, J. E., Rochau, G. A., & Hansen, S. B.. Development on the National Ignition Facility of a High Energy Density Opacity Platform. United States. doi:10.2172/1396155.
Perry, Theodore Sonne, Dodd, Evan S., DeVolder, Barbara Gloria, Johns, Heather Marie, Cardenas, Tana, Archuleta, Thomas Nick, Kline, John L., Flippo, Kirk Adler, Vinyard, Natalia Sergeevna, Sherrill, Manolo Edgar, Wilde, Bernhard Heinz, Tregillis, Ian Lee, Urbatsch, Todd James, Douglas, Melissa Rae, Heeter, R. F., Liedahl, D. A., Wilson, B. G., Iglesias, C. A., Schneider, M. B., Martin, M. E., London, R. A., Ahmed, M. F., Thompson, N. B., Emig, J. A., Zika, M. R., Opachich, Y. P., King, J. A., Ross, P. W., Huffman, E. J., Knight, R. A., Koch, J. A., Pond, T. D., Craxton, R. S., Zhang, R., McKenty, P. W., Garcia, E. M., Bailey, J. E., Rochau, G. A., and Hansen, S. B.. Mon . "Development on the National Ignition Facility of a High Energy Density Opacity Platform". United States. doi:10.2172/1396155. https://www.osti.gov/servlets/purl/1396155.
@article{osti_1396155,
title = {Development on the National Ignition Facility of a High Energy Density Opacity Platform},
author = {Perry, Theodore Sonne and Dodd, Evan S. and DeVolder, Barbara Gloria and Johns, Heather Marie and Cardenas, Tana and Archuleta, Thomas Nick and Kline, John L. and Flippo, Kirk Adler and Vinyard, Natalia Sergeevna and Sherrill, Manolo Edgar and Wilde, Bernhard Heinz and Tregillis, Ian Lee and Urbatsch, Todd James and Douglas, Melissa Rae and Heeter, R. F. and Liedahl, D. A. and Wilson, B. G. and Iglesias, C. A. and Schneider, M. B. and Martin, M. E. and London, R. A. and Ahmed, M. F. and Thompson, N. B. and Emig, J. A. and Zika, M. R. and Opachich, Y. P. and King, J. A. and Ross, P. W. and Huffman, E. J. and Knight, R. A. and Koch, J. A. and Pond, T. D. and Craxton, R. S. and Zhang, R. and McKenty, P. W. and Garcia, E. M. and Bailey, J. E. and Rochau, G. A. and Hansen, S. B.},
abstractNote = {X-ray opacity is a crucial factor in all radiation-hydrodynamics calculations, yet it is one of the least validated of the material properties in simulation codes for high-energy-density plasmas. Recent opacity experiments at the Sandia Z-machine have shown up to factors of two discrepancies between theory and experiment for various mid-Z elements (Fe, Cr, Ni). These discrepancies raise doubts regarding the accuracy of the opacity models which are used in ICF and stewardship as well as in astrophysics. Therefore, a new experimental opacity platform has been developed on the National Ignition Facility (NIF), not only to verify the Z-machine experimental results, but also to extend the experiments to other temperatures and densities. Within the context of the national opacity strategy, the first NIF experiments were directed towards measuring the opacity of iron at a temperature of ~160 eV and an electron density of ~7xl021 cm-3(Anchor 1). The Z data agree with theory at these conditions, providing a reference point for validation of the NIF platform. Development shots on NIF have demonstrated the ability to create a sufficiently bright point backlighter using an imploding plastic capsule, and also a combined hohlraum, sample and laser drive able to produce iron plasmas at the desired conditions. Spectrometer qualification has been completed, albeit with additional improvements planned, and the first iron absorption spectra have now been obtained.},
doi = {10.2172/1396155},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Oct 02 00:00:00 EDT 2017},
month = {Mon Oct 02 00:00:00 EDT 2017}
}

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