Abstract
Electric field distributions and average electron enrgies are measured by an optical emission spectroscopic method to investigate streamer characteristics in a pulsed corona discharge (PCD) and a dielectric barrier discharge (DBD) in atmospheric air. In PCD, average electron energies appear to be in the range of 10-12 eV along the streamers. Time-resolved measurements show that streamers in DBD have a relatively low value of average electron energy of 9-10 eV. Enhancement of the electron energy is observed when DBD is operated in a nonunuform geometry, such as dielectric barrier with a hole.; Supported by National Research Laboratory Program of KISTEP and Ministry of Science and Technology.