抄録
The purpose of this study is to elucidate the role of charges appearing on the opposite surface of a solid insulator in causing flashover along the insulator surface. The experimental apparatus used is consisted of two coaxial hard glass cylinders with a gas layer in between. Application of a magnetic field in the axial direction of the cylinders affects its surface flashover voltage. Appearance of an aurora-like discharge in the gas layer causes a sudden reduction of positive impulse flashover voltage. This study makes clear the relation between the aurora-like discharge and the surface flashover by obtaining the relation between the pressure of the gas layer and the magnetic flux density on the probability of the appearance of the aurora-like discharges quantitatively.
