Title :
Experimental investigation of surface flashover in vacuum using nanosecond pulses
Author :
Yan, Ping ; Shao, Tao ; Wang, Jue ; Gao, Wei ; Yuan, Weiqun ; Pan, Ruzheng ; Zhang, Shichang ; Sun, Guangsheng
Author_Institution :
Inst. of Electr. Eng., Chinese Acad. of Sci., Beijing
fDate :
6/1/2007 12:00:00 AM
Abstract :
Based on a Marx generator and a coaxial pulse forming line, an experimental investigation of surface flashover characteristics in vacuum is conducted by using nanosecond pulses of 10 ns rise time and 30 ns full width at half maximum (FWHM). Insulator dielectrics chosen for this investigation are Teflon, PMMA and Nylon. The tested factors include gas pressure, cone angle of conical frustum, diameter and length of cylindrical insulator, material and shape of electrode, and contact style between insulator and electrodes. The effects of these parameters on the surface flashover characteristics are described and analyzed in this paper. In addition, the character of flashover time lag in the nanosecond range, and surface flashover theory in vacuum charged by nanosecond pulses are also discussed.
Keywords :
electron emission; flashover; insulators; pulse generators; surface discharges; vacuum breakdown; FWHM; Marx generator; Nylon; PMMA; Teflon; coaxial pulse; electron emission; flashover time lag; full width-half maximum; insulator dielectrics; nanosecond pulses; surface flashover; vacuum; Character generation; Coaxial components; Dielectrics and electrical insulation; Electrodes; Flashover; Gas insulation; Insulator testing; Materials testing; Pulse generation; Space vector pulse width modulation;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
DOI :
10.1109/TDEI.2007.369524