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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Autores principales:	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
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/adfe59eb83e84a549b71227e88cedcc6
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spelling	oai:doaj.org-article:adfe59eb83e84a549b71227e88cedcc62021-12-02T12:30:17ZThermal conductivity measurements of proton-heated warm dense aluminum10.1038/s41598-017-07173-02045-2322https://doaj.org/article/adfe59eb83e84a549b71227e88cedcc62017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07173-0https://doaj.org/toc/2045-2322Abstract 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.A. McKelveyG. E. KempP. A. SterneA. Fernandez-PanellaR. ShepherdM. MarinakA. LinkG. W. CollinsH. SioJ. KingR. R. FreemanR. HuaC. McGuffeyJ. KimF. N. BegY. PingNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q 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
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.
format	article
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
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 Portfolio
publishDate	2017
url	https://doaj.org/article/adfe59eb83e84a549b71227e88cedcc6
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Thermal conductivity measurements of proton-heated warm dense aluminum

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