Thermal transport in shock wave–compressed solids using pulsed laser heating

Lone, B. M. La; Capelle, Gene A.; Stevens, G. D.; Turley, W. D.; Veeser, L. R.

doi:10.1063/1.4886615

Cited by 6 publications

(2 citation statements)

References 20 publications

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“…The surface heating technique has been used to measure thermal diffusivity in some low-energy-density systems. 8,9 For HED systems, the time scale is much faster, hence requiring diagnostics with much better time resolution, typically in the fs-ps range.…”

Section: Concept Descriptionmentioning

confidence: 99%

Differential heating: A versatile method for thermal conductivity measurements in high-energy-density matter

et al. 2015

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We propose a method for thermal conductivity measurements of high energy density matter based on differential heating. A temperature gradient is created either by surface heating of one material or at an interface between two materials by different energy deposition. The subsequent heat conduction across the temperature gradient is observed by various time-resolved probing techniques. Conceptual designs of such measurements using laser heating, proton heating, and x-ray heating are presented. The sensitivity of the measurements to thermal conductivity is confirmed by simulations. V

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Section: Concept Descriptionmentioning

confidence: 99%

Differential heating: A versatile method for thermal conductivity measurements in high-energy-density matter

et al. 2015

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“…We have previously described a similar pyrometer 18 and the IS 19,20 technique that were combined to determine the temperatures of tin shocked by high explosives. In our prior work, the highexplosive drive was not one-dimensional, which complicated the analysis, and the pressures did not drop low enough to observe melting.…”

Section: Introductionmentioning

confidence: 99%

High-pressure melt curve of shock-compressed tin measured using pyrometry and reflectance techniques

Lone

Asimow

Fat’yanov

et al. 2019

Journal of Applied Physics

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We have developed a new technique to measure the melt curve of a shocked metal sample and have used it to measure the high-pressure solid-liquid phase boundary of tin from 10 to 30 GPa and 1000 to 1800 K. Tin was shock compressed by plate impact using a single-stage powder gun, and we made accurate, time-resolved radiance, reflectance, and velocimetry measurements at the interface of the tin sample and a lithium fluoride window. From these measurements, we determined temperature and pressure at the interface vs time. We then converted these data to temperature vs pressure curves and plotted them on the tin phase diagram. The tin sample was initially shocked into the high-pressure solid γ phase, and a subsequent release wave originating from the back of the impactor lowered the pressure at the interface along a constant entropy path (release isentrope). When the release isentrope reaches the solid-liquid phase boundary, melt begins and the isentrope follows the phase boundary to low pressure. The onset of melt is identified by a significant change in the slope of the temperature-pressure release isentrope. Following the onset of melt, we obtain a continuous and highly accurate melt curve measurement. The technique allows a measurement along the melt curve with a single radiance and reflectance experiment. The measured temperature data are compared to the published equation of state calculations. Our data agree well with some but not all of the published melt curve calculations, demonstrating that this technique has sufficient accuracy to assess the validity of a given equation of state model.

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