Real-time, experimental characterization/investigation of hot-spots in shocked heterogeneous materials
Technical Report,30 Sep 2015,29 Sep 2019
WASHINGTON STATE UNIVERSITY PULLMAN United States
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To determine the feasibility of temperature measurements in heterogeneous materials under dynamic compression, we designed and synthesized various sensor materials and investigated their properties. The sensors consist of molecular complexes containing trivalent lanthanide ions such as Dy3 and various organic ligands. The 2-color fluorescence properties of Dy3 provide the temperature sensing capability. The ligands serve to enhance the absorption of UV light allow for the growth of molecular crystals and allow for dispersion in a polymer matrix. The sensors have been designed so that they can easily be excited by 355 nm laser light, have a high emission intensity over a wide range of temperatures, and have a fluorescence lifetime of at least 10 s. Such a lifetime allows us to excite the sensor with a single laser shot and transfer all the energy to the lanthanide ion right before the shock hits and deforms the molecular ligand structure.
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