The electric corona discharge in the triode system

In this paper, the charge density, electric field, and corona current distr ibutions in the corona triode are calculated using a hybrid technique; the finite-element method and the boundary-element method are combined with the method of characteristics. The characteristic lines are traced backward fr om points of the analyzed domain to the corona wire. The current density, e lectric field, and space-charge density distributions can be controlled by changing the configuration of the system, The voltage applied to the grid p lays an important role in controlling the corona current. Results of calcul ations in a number of different cases show the influence of different param eters on the characteristics of the corona triode.