Process of Surface Flashover in Vacuum Under Nanosecond Pulse

In a wide variety of high-power pulsed devices, vacuum surface flashover plays a key role in the system performance. High-speed electrical measurements with temporal resolution in the nanosecond range were employed to measure the flashover characteristics, and high-speed three-frame photography was...

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Bibliographic Details
Published in:IEEE transactions on plasma science 2010-01, Vol.38 (1), p.53-58
Main Authors: Tang, Junping, Qiu, Aici, Yang, Li, Jia, Wei, Wang, Haiyang, Li, Junna
Format: Article
Language:English
Subjects:
Channels
Electric and magnetic measurements
Electric variables measurement
Electricity
Exact sciences and technology
Flashover
Frame camera
High speed
Insulation
insulator
Luminosity
nanosecond pulse
Nanosecond pulses
Nanostructure
Phase measurement
Phases
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
Plasma
Plasma diagnostic techniques and instrumentation
Pulse generation
Space vector pulse width modulation
Surface flashover
Testing
vacuum
Vacuum breakdown
Vacuum systems
Voltage
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Description
Summary:In a wide variety of high-power pulsed devices, vacuum surface flashover plays a key role in the system performance. High-speed electrical measurements with temporal resolution in the nanosecond range were employed to measure the flashover characteristics, and high-speed three-frame photography was used to image the flashover channels at different phases along the insulator surface. From these test results, the flashover under nanosecond pulse would experience a process with three typical phases: initial phase, developing phase, and extinguishing phase. Spectra luminosity of the flashover channel is also discussed for better understanding the mechanism of the flashover process.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2009.2035127