Displacement Current and Surface Flashover

harris, J R; Caporaso, G J; Blackfield, D; Chen, Y J

doi:10.1063/1.2785116

Displacement Current and Surface Flashover

Journal Article · Tue Jul 17 00:00:00 EDT 2007 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2785116· OSTI ID:921160

harris, J R; Caporaso, G J; Blackfield, D; Chen, Y J

High-voltage vacuum insulator failure is generally due to surface flashover rather than insulator bulk breakdown. Vacuum surface flashover is widely believed to be initiated by a secondary electron emission avalanche along the vacuum-insulator interface. This process requires a physical mechanism to cause secondary electrons emitted from the insulator surface to return to that surface. Here, we show that when an insulator is subjected to a fast high-voltage pulse, the magnetic field due to displacement current through the insulator can provide this mechanism. This indicates the importance of the voltage pulse shape, especially the rise time, in the flashover initiation process.

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA

Sponsoring Organization:: USDOE

DOE Contract Number:: W-7405-ENG-48

OSTI ID:: 921160

Report Number(s):: UCRL-JRNL-233215

Journal Information:: Applied Physics Letters, Journal Name: Applied Physics Letters Vol. 91; ISSN APPLAB; ISSN 0003-6951

Country of Publication:: United States

Language:: English

References (9)

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Mechanism of pulsed surface flashover involving electron‐stimulated desorption Anderson, R. A.; Brainard, J. P. Journal of Applied Physics, Vol. 51, Issue 3 https://doi.org/10.1063/1.327839	journal	March 1980
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Propagation velocity of cathode‐initiated surface flashover Anderson, R. A. Journal of Applied Physics, Vol. 48, Issue 10 https://doi.org/10.1063/1.323405	journal	October 1977
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Magnetic inhibition of insulator flashover VanDevender, J. P.; McDaniel, D. H.; Neau, E. L. Journal of Applied Physics, Vol. 53, Issue 6 https://doi.org/10.1063/1.331229	journal	June 1982
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Related Subjects

43 PARTICLE ACCELERATORS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BREAKDOWN
ELECTRON EMISSION
ELECTRONS
FLASHOVER
MAGNETIC FIELDS
PULSE RISE TIME
SHAPE

Displacement Current and Surface Flashover

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