On the effect of space charges on breakdown strength by using two different injection methods

The paper reports two different space charge injection methods and their effect on breakdown strength. Space charges were injected into a point-plane gap either using a corona pin arrangement external to the gap or by applying a dc voltage to the point electrode. It has been found that the two different space charges injection methods have the same effect on minimum impulse breakdown levels in both electron-attaching and non-attaching gases. The experimental evidence indicates that the initiatory electrons resulting from detachment have a great influence on the breakdown strength.