Corona discharge light emission and electric field intensity comparison

Results of experimental investigation of corona light emission for different point-to-plane electrode configurations are presented in this contribution. Corona discharge was burning in the air at atmospheric pressure. Results indicate that single point corona radiation may be correlated with the emission of point light source shaped as the truncated cone with smaller base placed in the vicinity of the point electrodes spike. Emitted light intensity distributions for combinations of two and three electrodes predicate that their light emission in dependence on the individual electrodes spacing resembles to that of more point sources combination. With decreasing inter-electrode spacing electric fields relevant to individual electrodes seem to interact. For three electrodes configuration this interaction may result in suppresion of the middle electrodes electric field; and hence its light emission, too. We are also calculated electric field distribution for the same electrode configuration. The paper presents comparison of measured and calculated data.