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 ver...
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doaj-adfe59eb83e84a549b71227e88cedcc62020-12-08T00:08:27ZengNature Publishing GroupScientific Reports2045-23222017-08-017111010.1038/s41598-017-07173-0Thermal conductivity measurements of proton-heated warm dense aluminumA. McKelvey0G. E. Kemp1P. A. Sterne2A. Fernandez-Panella3R. Shepherd4M. Marinak5A. Link6G. W. Collins7H. Sio8J. King9R. R. Freeman10R. Hua11C. McGuffey12J. Kim13F. N. Beg14Y. Ping15Lawrence Livermore National LaboratoryLawrence Livermore National LaboratoryLawrence Livermore National LaboratoryLawrence Livermore National LaboratoryLawrence Livermore National LaboratoryLawrence Livermore National LaboratoryLawrence Livermore National LaboratoryLawrence Livermore National LaboratoryMassachusetts Institute of Technology, Plasma Science and Fusion CenterThe Ohio State University, Physics DepartmentThe Ohio State University, Physics DepartmentUniversity of California San Diego, Center for Energy ResearchUniversity of California San Diego, Center for Energy ResearchUniversity of California San Diego, Center for Energy ResearchUniversity of California San Diego, Center for Energy ResearchLawrence Livermore National LaboratoryAbstract 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.https://doi.org/10.1038/s41598-017-07173-0 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
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 |
spellingShingle |
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 Thermal conductivity measurements of proton-heated warm dense aluminum Scientific Reports |
author_facet |
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 |
author_sort |
A. McKelvey |
title |
Thermal conductivity measurements of proton-heated warm dense aluminum |
title_short |
Thermal conductivity measurements of proton-heated warm dense aluminum |
title_full |
Thermal conductivity measurements of proton-heated warm dense aluminum |
title_fullStr |
Thermal conductivity measurements of proton-heated warm dense aluminum |
title_full_unstemmed |
Thermal conductivity measurements of proton-heated warm dense aluminum |
title_sort |
thermal conductivity measurements of proton-heated warm dense aluminum |
publisher |
Nature Publishing Group |
series |
Scientific Reports |
issn |
2045-2322 |
publishDate |
2017-08-01 |
description |
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. |
url |
https://doi.org/10.1038/s41598-017-07173-0 |
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