Temperature measurements of a thermal wave at static high pressures

Experiments probing the dynamics of a thermal wave in a material compressed at static high pressures are presented. The method involves launching a thermal wave in a sample compressed in an anvil cell and monitoring the temporal profile of temperature at a fixed point downstream. A pulsed laser inci...

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Bibliographic Details
Published in:Applied physics letters 2000-04, Vol.76 (17), p.2460-2462
Main Authors: Pangilinan, G. I., Ladouceur, H. D., Russell, T. P.
Format: Article
Language:English
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Summary:Experiments probing the dynamics of a thermal wave in a material compressed at static high pressures are presented. The method involves launching a thermal wave in a sample compressed in an anvil cell and monitoring the temporal profile of temperature at a fixed point downstream. A pulsed laser incident on a metal foil provides the thermal wave, while fluorescence from a small ruby sphere yields the time-resolved temperature. Results from compressed NaCl show that temperature rises quickly and decays much more slowly, consistent with the expected heat flow. This temporal profile evaluated with a numerical solution of the heat-conduction equation or an analytical approximation provides values for thermal conductivity, thermal diffusivity, and heat capacity at pressures to 1.7 GPa.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.126376