摘要
Diffuse and spark discharges are formed and studied during breakdowns with nonuniform electric field in nitrogen,air,and argon at elevated pressures and pulse repetition frequency of 400 Hz.Negative-polarity voltage pulses of the amplitude 20 kV,width at the base of 15 ns and rise time of 2 ns are applied to the electrode with a small radius of curvature.In the conditions of generation of runaway electron beams and X-rays,a CCD camera records the time of the diffuse discharge formation and its duration prior to its transition to a spark one.In all three gases,the diffuse discharge is formed during the time not exceeding 1 ns,when the bright spots appear on cathode in argon and air resulting in the beginning of the spark channel propagation.
Diffuse and spark discharges are formed and studied during breakdowns with nonuniform electric field in nitrogen, air, and argon at elevated pressures and pulse repetition frequency of 400 Hz. Negative-polarity voltage pulses of the amplitude ~20 kV, width at the base of -15 ns and rise time of-2 ns are applied to the electrode with a small radius of curvature. In the conditions of generation of runaway electron beams and X-rays, a CCD camera records the time of the diffuse discharge formation and its duration prior to its transition to a spark one. In all three gases, the diffuse discharge is formed during the time not exceeding 1 ns, when the bright spots appear on cathode in argon and air resulting in the beginning of the spark channel propagation.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2013年第9期2105-2111,共7页
High Voltage Engineering
基金
Project supported by Russian Foundation for Basic Research(under Grant12-08-00105_a)
