Date of Award
Master of Science in Engineering (MSE)
Mechanical and Aerospace Engineering
Kunning G. Xu
Jason T. Cassibry
Plasma diagnostics., Plasma probes., Emission spectroscopy.
This study investigated the application of physical probes and optical emission spectroscopy to an atmospheric microplasma jet to determine the gas temperature, electron temperature, and electron density of the plasma. Emission lines and species of interest were chosen to determine the impact of experimental configuration on the accuracy of measurements. The results showed that there is a noticeable difference in not only each of the different gas temperature determination methods, but also for individual argon spectral lines when using van der Waals broadening. The usefulness of argon spectral lines also appears to vary with electrode configurations and temperatures. Electron temperature and density were found to increase and decrease, respectively, with an increase in measurement distance. These effects may be attributed to high collisionality via neutralization collisions and continuum flow turbulence due to mixing with ambient air.
Doyle, Steven J., "A study of optical and physical probe diagnostic techniques for atmospheric-pressure plasmas" (2017). Theses. 226.