Dissertation Defense: Laser Diagnostics for Kinetic Studies of Nonequilibrium Molecular Plasmas and High-Speed Flows

 Elijah Jans

Abstract: 
Kinetics of the excited metastable state of molecular nitrogen, N2(A3Σu+), and the low-temperature hydroperoxyl radical, HO2, have been studied using newly developed laser diagnostics, Cavity Ring Down Spectroscopy (CRDS) and Tunable Diode Laser Spectroscopy (TDLAS). Measurements of these species have been made in three different environments, where they have been generated by a repetitive, ns pulse, double dielectric barrier discharge plasmas, (i) high-pressure, low-temperature plasma in nitrogen, N2-O2, N2-H2, and N2-NO mixtures; (ii) supersonic flows of nitrogen in a nonequilibrium flow, blowdown wind tunnel (Mach 4-5), excited by an electric discharge in the plenum; and (iii) H2-O2, CH4-O2, and C2H4-O2 mixtures diluted in argon in a heated plasma flow reactor.

Meeting ID: 982 3150 9113
Password: 061101