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McKelvey A, Kemp GE, Sterne PA, et al. Thermal conductivity measurements of proton-heated warm dense aluminum. Sci Rep. 2017;7(1):7015doi: 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. (2017). Thermal conductivity measurements of proton-heated warm dense aluminum. Scientific reports, 7(1), 7015. https://doi.org/10.1038/s41598-017-07173-0
McKelvey, A, et al. "Thermal conductivity measurements of proton-heated warm dense aluminum." Scientific reports vol. 7,1 (2017): 7015. doi: https://doi.org/10.1038/s41598-017-07173-0
McKelvey A, Kemp GE, Sterne PA, Fernandez-Panella A, Shepherd R, Marinak M, Link A, Collins GW, Sio H, King J, Freeman RR, Hua R, McGuffey C, Kim J, Beg FN, Ping Y. Thermal conductivity measurements of proton-heated warm dense aluminum. Sci Rep. 2017 Aug 01;7(1):7015. doi: 10.1038/s41598-017-07173-0. PMID: 28765571; PMCID: PMC5539319.
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Sci Rep. 2017 Aug 01;7(1):7015. doi: 10.1038/s41598-017-07173-0.

Thermal conductivity measurements of proton-heated warm dense aluminum.

Scientific reports

A McKelvey, G E Kemp, P A Sterne, A Fernandez-Panella, R Shepherd, M Marinak, A Link, G W Collins, H Sio, J King, R R Freeman, R Hua, C McGuffey, J Kim, F N Beg, Y Ping

Affiliations

  1. Lawrence Livermore National Laboratory, Livermore, CA, 94550, USA.
  2. University of Michigan, Nuclear Engineering Department, Ann Arbor, MI, 48109, USA.
  3. Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, MA, 02139, USA.
  4. The Ohio State University, Physics Department, Columbus, Ohio, 43210, USA.
  5. University of California San Diego, Center for Energy Research, La Jolla, CA, 92093, USA.
  6. Lawrence Livermore National Laboratory, Livermore, CA, 94550, USA. [email protected].

PMID: 28765571 PMCID: PMC5539319 DOI: 10.1038/s41598-017-07173-0

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.

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