Performance of producing a high energy electron can be improved,if the glow discharge is generated in a system of dielectric barrier discharge.In this paper,different discharge modes of pin-to-plane dielectric barrier discharge are investigated in atmospheric pressure.Different discharge modes are observed in the positive half-period and negative half-period of the discharge.When and applied voltage is 3 kV,a streamer mode appear in the positive half-period and a corona(or Trichel discharge) mode occurs in ...