Development of 2.45 GHz waveguide-based air torch system

Summary form only given, as follows. We developed a waveguide air torch system using a 2.45 GHz magnetron. This torch system is designed for the decomposition of toxic gases, such as fluoro-carbon or chlorocarbon gases. The microwave torch system is consisted of a magnetron tube, an isolator, a directional coupler, a 3-stub tuner, an E-plane tapered section, and the torch region where a quartz tube and a nozzle are located. The magnetron generates a maximum RF-power of 15 kW. The plasma is initiated by touching the nozzle tip with a grounded metal piece. A plasma flame is formed at the the tip of the nozzle with varying size following the air stream from the tip of the nozzle. Due to the high collision rate with the surrounding air, the plasma flame appears the same as a flame from a gas burning torch.