Advances in understanding shock temperature phenomena using pyrometric techniques
ORAL · Invited
Abstract
Understanding temperature in dynamic compression experiments is an ongoing challenge in the field of shock physics. Measuring and interpreting Planck radiance is a first step toward knowledge of thermal phenomena under shock. However, the true precision of temperature measurements is only as great as our understanding of the underlying systems and the processes at play within them. This talk will briefly discuss pyrometric benchmarks and emissivity analysis techniques before focusing on the relationship between dynamic thermal interfaces and the underlying properties of the materials across them. We will describe application of these properties in recent results mapping Hugoniot states, identifying phase boundaries, and investigating more complex systems. In each case, experimental designs can avoid or address current areas of uncertainty in shock temperature measurement.
*Los Alamos National Laboratory is operated by Triad National Security, LLC for the National Nuclear Security Administration of U.S. Department of Energy under contract 89233218CNA000001.
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Publication:Hartsfield, T. M., La Lone, B. M., Stevens, G. D., Veeser, L. R., & Dolan, D. H. "Thermal interfaces in dynamic compression experiments." J. Appl. Phys. 128(1) 015903 (2020).
T. M. Hartsfield, B. M. La Lone, G. D. Stevens, J. K. Baldwin, and W. D. Turley, "Dynamic refreeze of shock-compressed cerium measured by isobaric thin film cooling," Manuscript in Preparation (2022).
Hartsfield, T. M., & Dolan, D. H. "Establishing temperature from radiance of dynamically compressed metals." Submitted, J. Appl. Phys. (2022)
T. M. Hartsfield, J. M. Lang Jr., P. M. Goodwin, and L. R. Veeser, "A comparison of Raman and pyrometry dynamic temperature measurements of shocked cyclohexane." J. Appl. Phys. 129, 075901 (2021).