2012 BFY Abstract Detail Page
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||An Undergraduate Research Project Incorporating LabVIEW to Measure Temperature Dependent Lifetimes in a Phosphor
||In the Spring of 2012, a group of undergraduates varied the temperature of a LaSO4:Eu phosphor and performed performed fluorescence lifetime measurements on one of its transitions. The phosphor's temperature was varied by using a thermoelectric (TE) cooler that was driven by a temperature control circuit. The temperature was monitored with a thermistor. The students learned LabVIEW by using John Essick's excellent text, entitled Hands-On Introduction to LabVIEW for Scientist and Engineers. The students wrote a LabVIEW program that allowed the user to enter a set point temperature for the TE device and used feedback from the thermistor to adjust the temperature of the phosphor until it reached the set point. The phosphor was excited with the 337 nm output of a Nitrogen laser. An Oriel monochromator was used to disperse the fluorescence. The lifetime for a particular transition was determined by photomuliplier measurements of the fluorescence.
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R. Seth Smith
Francis Marion University, Department of Physics and Astronomy
4822 E. Palmetto St.
Charles J. Nettles, Jonathan J. Heath