Optimization and application of microwave-excited discharges

A study of the experimental parameters influencing the behavior of Electrodeless Discharge Lamps (EDL's) was undertaken. Parameters such as, fill gas, fill gas pressure, the mass of material introduced into the lamp, and lamp shape were investigated. These experimental parameters were adjusted to optimize the intensity of emission, S/N, drift and coupling efficiency. An atmospheric pressure flowing argon plasma was applied as a detector for gas chromatography. This system was used to determine the concentration of nitrogen and its oxides in air samples. The fundamental electrical properties of the plasma such as, electron density, electron temperature and equivalent resistance were measured by the double probe method. The influence of the experimental parameters such as, power, flow rate, and sample input on the electrical properties were determined.