Measurement of Fe Temperature under Dynamic Compression
ORAL
Abstract
We report on progress toward measuring the temperature of Fe at ~2 Mbar, near the melting point on the Hugoniot, as part of an effort to obtain a complete equation of state for Fe. Fe was directly coated on a LiF tamping window and shock compressed using a two stage light gas gun. Radiance and reflectance were simultaneously measured from ~350-750 nm using four streak spectrometers. Comparison of reflected and emitted light allows us to calculate emissivity as a function of wavelength to correct graybody emission to determine T, predicted to be around 5000K, and compare measured reflectance with band structure calculations.
*This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
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