skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Thermal conductivity measurements of proton-heated warm dense aluminum

Abstract

Thermal conductivity is one of the most crucial physical properties of matter when it comes to understanding heat transport, hydrodynamic evolution, and energy balance in systems ranging from astrophysical objects to fusion plasmas. In the warm dense matter regime, experimental data are very scarce so that many theoretical models remain untested. Here we present the first thermal conductivity measurements of aluminum at 0.5–2.7 g/cc and 2–10 eV, using a recently developed platform of differential heating. A temperature gradient is induced in a Au/Al dual-layer target by proton heating, and subsequent heat flow from the hotter Au to the Al rear surface is detected by two simultaneous time-resolved diagnostics. A systematic data set allows for constraining both thermal conductivity and equation-of-state models. Simulations using Purgatorio model or Sesame S27314 for Al thermal conductivity and LEOS for Au/Al release equation-of-state show good agreement with data after 15 ps. Discrepancy still exists at early time 0–15 ps, likely due to non-equilibrium conditions.

Authors:
 [1];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [3];  [4];  [5];  [6]; ORCiD logo [6];  [6];  [6];  [2]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. of Michigan, Ann Arbor, MI (United States). Nuclear Engineering Department
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
  4. The Ohio State Univ., Columbus, OH (United States). Physics Department
  5. The Ohio State Univ., Columbus, OH (United States). Physics Department
  6. University of California San Diego, La Jolla, CA (United States). Center for Energy Research
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1395483
Grant/Contract Number:
AC52-07NA27344
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 7; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Condensed-matter physics; Plasma physics

Citation Formats

McKelvey, A., Kemp, G. E., Sterne, P. A., Fernandez-Panella, A., Shepherd, R., Marinak, M., Link, A., Collins, G. W., Sio, H., King, J., Freeman, R. R., Hua, R., McGuffey, C., Kim, J., Beg, F. N., and Ping, Y. Thermal conductivity measurements of proton-heated warm dense aluminum. United States: N. p., 2017. Web. doi:10.1038/s41598-017-07173-0.
McKelvey, A., Kemp, G. E., Sterne, P. A., Fernandez-Panella, A., Shepherd, R., Marinak, M., Link, A., Collins, G. W., Sio, H., King, J., Freeman, R. R., Hua, R., McGuffey, C., Kim, J., Beg, F. N., & Ping, Y. Thermal conductivity measurements of proton-heated warm dense aluminum. United States. doi:10.1038/s41598-017-07173-0.
McKelvey, A., Kemp, G. E., Sterne, P. A., Fernandez-Panella, A., Shepherd, R., Marinak, M., Link, A., Collins, G. W., Sio, H., King, J., Freeman, R. R., Hua, R., McGuffey, C., Kim, J., Beg, F. N., and Ping, Y. Tue . "Thermal conductivity measurements of proton-heated warm dense aluminum". United States. doi:10.1038/s41598-017-07173-0. https://www.osti.gov/servlets/purl/1395483.
@article{osti_1395483,
title = {Thermal conductivity measurements of proton-heated warm dense aluminum},
author = {McKelvey, A. and Kemp, G. E. and Sterne, P. A. and Fernandez-Panella, A. and Shepherd, R. and Marinak, M. and Link, A. and Collins, G. W. and Sio, H. and King, J. and Freeman, R. R. and Hua, R. and McGuffey, C. and Kim, J. and Beg, F. N. and Ping, Y.},
abstractNote = {Thermal conductivity is one of the most crucial physical properties of matter when it comes to understanding heat transport, hydrodynamic evolution, and energy balance in systems ranging from astrophysical objects to fusion plasmas. In the warm dense matter regime, experimental data are very scarce so that many theoretical models remain untested. Here we present the first thermal conductivity measurements of aluminum at 0.5–2.7 g/cc and 2–10 eV, using a recently developed platform of differential heating. A temperature gradient is induced in a Au/Al dual-layer target by proton heating, and subsequent heat flow from the hotter Au to the Al rear surface is detected by two simultaneous time-resolved diagnostics. A systematic data set allows for constraining both thermal conductivity and equation-of-state models. Simulations using Purgatorio model or Sesame S27314 for Al thermal conductivity and LEOS for Au/Al release equation-of-state show good agreement with data after 15 ps. Discrepancy still exists at early time 0–15 ps, likely due to non-equilibrium conditions.},
doi = {10.1038/s41598-017-07173-0},
journal = {Scientific Reports},
number = 1,
volume = 7,
place = {United States},
year = {Tue Aug 01 00:00:00 EDT 2017},
month = {Tue Aug 01 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Save / Share: