Lyzenga, G. A. and Ahrens, Thomas J. (1979) Multiwavelength optical pyrometer for shock compression experiments. Review of Scientific Instruments, 50 (11). pp. 1421-1424. ISSN 0034-6748. http://resolver.caltech.edu/CaltechAUTHORS:LYZrsi79
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A system for measurement of the spectral radiance of materials shocked to high pressures (~100 GPa) by impact using a light gas gun is described. Thermal radiation from the sample is sampled at six wavelength bands in the visible spectrum, and each signal is separately detected by solid-state photodiodes, and recorded with a time resolution of ~10 ns. Interpretation of the records in terms of temperature of transparent sample materials is discussed. Results of a series of exploratory experiments with metals are also given. Shock temperatures in the range 4000–8000 K have been reliably measured. Spectral radiance and temperatures have been determined with uncertainties of 2%.
|Additional Information:||Copyright © 1979 American Institute of Physics. This research was supported by the National Science Foundation Grant No. EAR-7812942 and the Department of Energy. The experiments were performed at the Lawrence Livermore Laboratory light-gas gun facility. The authors are grateful for the help and encouragement of A.C. Mitchell and W.J. Nellis of the Lawrence Livermore Laboratory, and J.W. Shaner of Los Alamos Scientific Laboratory. We are grateful for the assistance of W.C. Wallace, E. Jerbic, D. Bakker, and H. Martinez. Contribution No. 3245, Division of Geological and Planetary Sciences, California Institute of Technology. [G.A.L. was] [s]upported by the Fannie and John Hertz Foundation.|
|Subject Keywords:||SHOCK WAVES, COMPRESSION, OPTICAL PYROMETERS, WAVELENGTHS, SPECTRA, VERY HIGH PRESSURE, RADIANT FLUX DENSITY, GASES, THERMAL RADIATION, VISIBLE RADIATION, PHOTODIODES, TIME RESOLUTION|
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|Deposited On:||23 Jun 2008|
|Last Modified:||26 Dec 2012 10:07|
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