Publications Details

Study of sensitivity vs. Excitation time of led excited thermographic phosphor

Flores Brito, Wendy F.; Westphal, Eric; Wilburn, Bethany R.; Hoffmeister, Kathryn N.

The excitation of Mg3F2GeO4:Mn thermographic phosphors using a UV LED centered at 365 nm is explored. Two different LED drivers, one available commercially and one built at Sandia National Laboratories (SNL), were used and assessed for their viability for phosphor thermometry utilizing LED excitation and intensified, high-speed, CMOS camera data collection. The SNL-driven LED was then utilized as an excitation source for Mg3F2GeO4:Mn-phosphor calibration and demonstration experiments measuring the temperature of a silicon carbide heating rod using the time-decay method. The results presented here serve as a step toward determining the application space, wherein SNL driven LED excitation would be preferable over the use of laser systems for thermographic phosphor measurements.