Temporally Resolved Emissivity and Temperature Measurements of Quartz on a Light Gas Gun

Emissivity has long been neglected in pyrometric measurements on shocked samples. We have built and tested~a broad spectrum apparatus and developed a new target design to dynamically measure reflectance and calculate emissivity on a two stage light gas gun. Using this system, we have measured the emission of Quartz and Fused silica near melt.~ This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.