[PDF][PDF] X-ray Excitation of Thermographic Phosphors.

ER Westphal, SF Son, EC Quintana, KNG Hoffmeister - 2019 - osti.gov
2019osti.gov
A compelling diagnostic approach for characterizing reacting solids would be simultaneous
X-ray probing combined with surface temperature measurements of the sample. Phosphor
thermometry shows promise at providing this type of measurement through characterization
of the induced emission of phosphor particles coated on the surface of a sample. Typical
thermographic phosphors are excited using UV/visible radiation in the form of a laser, and
several thermographic phosphors exist which are also known X-ray scintillators. One such X …
Abstract
A compelling diagnostic approach for characterizing reacting solids would be simultaneous X-ray probing combined with surface temperature measurements of the sample. Phosphor thermometry shows promise at providing this type of measurement through characterization of the induced emission of phosphor particles coated on the surface of a sample. Typical thermographic phosphors are excited using UV/visible radiation in the form of a laser, and several thermographic phosphors exist which are also known X-ray scintillators. One such X-ray scintillator, Gd202S: Tb, is explored here to determine if its induced emission remains thermographic during X-ray excitation. Measured spectra show a temperature sensitivity between 22-80 C. These measured spectra and two intensity ratio calibrations are compared to those found in literature for this phosphor during UV excitation. These results serve as an important first step towards simultaneous X-ray probing and surface temperature measurements of a sample and show for the first time that the induced emission of a thermographic phosphor can remain thermographic during X-ray excitation.
osti.gov
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