Development of a Spatially Resolved Optical Technique to Measure Temperature using Two-Photon Absorption of Xenon
Abstract
A new spatially resolved optical technique to measure temperature was developed using
two-photon absorption of xenon. This experiment excited the 256 nm two-photon
transition of xenon by focusing the excitation source into a test cell at room temperature.
Two-photon absorption only occurs at the focus of a laser beam; therefore a point
measurement technique was possible. The spatial resolution for this experiment was
approximately 0.6 mm; however, this technique enables higher resolution depending on
the focus of the laser beam. Two-photon absorbance versus xenon number density was
determined experimentally and used to validate a theoretical model created in MATLAB.
This technique was designed primarily for two non-reacting flows: the vortex tube and
the pulse tube. A case study for measurement in a vortex tube was presented; however,
applying this technique to a pulse tube will be similar.
Subject
University of Wisconsin--Madison. College of Engineering.
Thesis (M.S.)--University of Wisconsin--Madison, 2005.
Permanent Link
http://digital.library.wisc.edu/1793/6514Description
Under the supervision of Assistant Professor Scott T. Sanders, Pages: 95