Cold-model experimental and simulation research of reaction zone of a microwave plasma torch

In order to analyze the influences of tuning parameters and the frequency of microwave sources on the electric intensity of plasma reaction zone, we put forward a cold-model experiment on a 2.45 GHz microwave plasma torch (MPT), and compared the results with CST electromagnetic simulations. It is obtained that the parameters affect the cold-model experiment with a law that well agrees with the simulation, but the optimal values of the two have certain deviations. The microwave radiation energy is mainly produced by magnetic coupling, and there is the peak of electric field strength when the total height of tuning cylinder is around 45.21~50.04 mm. When the optimal tuning parameters obtained from the cold-model experiment are adopted, MPT of various gases are produced at atmospheric pressure with low power. This verifies the effectiveness of cold-model experiment for obtaining the optimal tuning parameters.