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Feasibility of Measuring Ruby Luminescence Wavelength Shift under Shock Loading.
Technical rept. 1 Mar 84-1 Apr 85,
WASHINGTON STATE UNIV PULLMAN SHOCK DYNAMICS LAB
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The feasibility of developing an optical stress transducer and transmission system for use under dynamic loading is described. The ruby luminescence R lines wavelength shift was selected as the conceptual basis for dynamic stress measurement. An experimental configuration using thin ruby crystals as transducers and optical fibers for signal transmission in plate impact experiments was developed. Calculations pertinent to generation and collection of luminescence are presented. Impact experiments using photomultiplier tubes and an optical multichannel analyzer as detectors were performed to examine the validity of the experimental design. Results of these preliminary experiments show a shift in the luminescence R-lines, as expected. Although the present results demonstrate the feasibility of developing an optical stress transducer, further research efforts are needed before time-resolved quantitative measurements can be obtained. Future experiments are outlined. Spectral transmission characteristics of shocked optical fibers have also been resolved. Keywords Ruby Luminescence Ruby Fluorescence High Pressure Shock Transducer Shock Wave.
APPROVED FOR PUBLIC RELEASE