Pulsed corona existence up to 850 C

Generation and existence of pulsed corona are investigated in view of various applications in the temperature range of 20 C to 850 C. Control of corona in situations with high temperature or in the presence of much contamination can be substantially improved by pulsation of the high voltage Both negative and positive corona are investigated. We emphasize the concept of the existence diagram for pulsed corona and the importance of the interaction of external circuit and corona discharge. It is shown that pulsation leads to strongly intensified corona currents and to a considerable increase in the width of the existence region (the margin between corona inception and full breakdown). Using pulse—widths in the 10 ps range one can thus achieve problemfree corona operation at 800 C.