Application of Fluorescence to Measurement of Surface Temperature in Solid Propellants,
SYSTEMS RESEARCH LABS INC DAYTON OH
Pagination or Media Count:
Three rare-earth-ion crystals were shown to be good candidates for surface-temperature measurements on energetic materials by laser-induced fluorescence. Dy3.LaF3 displays a thermalization process with an energy gap of 1070cm, resulting in a fluorescence intensity change of approx. 200 over a 700-K temperature range. Cr3Al2O3 ruby displays an extreme temperature sensitivity to the life-time of the R-fluorescence lines. The lifetimes are observed to change by a factor of approx. 230 over a 500-K temperature range. Er3CaF2 shows a temperature sensitivity of 20 over a temperature range of 700 K, as measured by the lifetime of its lifetime of its E4S32 fluorescence line.