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DOE OSTI · 1727439

A multi-wavelength streaked optical pyrometer for dynamic shock compression measurements above 2500 K

Opachich, Y. P.·Crum, R. S.·Daene, M. W.·Dutra, E. C.·Mehta, H. N.·Shelton, H. L.·Watts, P.·Akin, M. C.
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Abstract

This work presents a concept and implementation of a calibrated streaked spectral pyrometer (SSP) temperature diagnostic used in dynamically driven shock experiments on a two-stage gas gun. This system relies upon measuring the total system response using a tunable monochromator, a NIST-traceable calibrated power meter, and a SSP. The diagnostic performance is validated against previously measured temperatures of shock driven z-cut quartz at 99 GPa and 93 GPa. The results are found to agree with the literature to within 5% and are discussed in this manuscript. The experimental setup utilizes measurements from multiple SSP systems per sample, providing several independent measurements and substantially increasing confidence in the extrapolated shock driven sample temperature.

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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGYEmission spectroscopyEquations of stateMonochromatorsPhotocathodesShock compressionStreak camerasThermal instruments

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Opachich, Y. P., Crum, R. S., Daene, M. W., Dutra, E. C., Mehta, H. N., Shelton, H. L., Watts, P., Akin, M. C.. 2020-03-23. A multi-wavelength streaked optical pyrometer for dynamic shock compression measurements above 2500 K. https://doi.org/10.1063/1.5126123

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