Heat-release EOS and thermal conductivity of warm dense carbon by proton differential heating
Abstract
Measurements of amorphous carbon thermal conductivity at 2-8 eV temperatures using differential heating platform will be presented. This platform has previously demonstrated such measurements for Al. A temperature gradient is induced in a Au/C dual-layer target by proton differential heating. The subsequent heat flow from the hotter Au to the carbon rear surface is detected by two simultaneous time-resolved diagnostics: streak optical pyrometry for surface temperature and Fourier domain interferometry for surface motion. The comparison between the data and 7 EOS tables shows that only one EOS model can reasonably reproduce all the data. By using a chi-square statistical analysis to quantify the comparison, the thermal conductivity model is constrained with uncertainties down to +-10%.
This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under contract DE-AC52-07NA27344 with support from DOE OFES Early Career program.- Publication:
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APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- 2018
- Bibcode:
- 2018APS..DPPYO4005P