Title :
Nanosecond pulse surface discharge on insulator of plasma focus device
Author :
Daxiong, Zeng ; Jinji, Yang
Author_Institution :
Inst. of Electr. Eng., Acad. Sinica, Beijing, China
Abstract :
The performance of a plasma focus device can be influenced by its initial breakdown taking place on the surface of its insulator. A nanosecond square voltage pulse generator was used to study the discharge process on the surface of the insulator. Photos with a time resolution of 5-10 ns have been obtained. The discharge begins and grows on and along the surface of the insulator from the flange of the outer electrode, and its velocity depends on the amplitude, width, and polarity of the applied pulse voltage, as well as the gas pressure. For the pressure range of 5-200 torr, amplitude range of 6-15 kV, and pulse duration of 5-80 ns, the velocity lies in the range of 107-2×209 cm/s. It is observed that the discharge sheath does not turn into a plasma sheath with low resistance after a luminous sheath of initial discharge bridges both electrode
Keywords :
plasma devices; plasma focus; surface discharges; 5 to 200 torr; 5 to 80 ns; 6 to 15 kV; amplitude; applied pulse voltage; discharge process; discharge sheath; gas pressure; insulator; luminous sheath; nanosecond square voltage pulse generator; plasma focus device; plasma sheath; polarity; surface discharge; width; Electric breakdown; Electrodes; Flanges; Gas insulation; Plasma devices; Plasma sheaths; Pulse generation; Space vector pulse width modulation; Surface discharges; Voltage;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1988. Proceedings., Second International Conference on Properties and Applications of
Conference_Location :
Beijing
DOI :
10.1109/ICPADM.1988.38460
