Vacuum surface flashover and high pressure gas streamers

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Pre-breakdown current traces obtained during high pressure gas breakdown and vacuum surface flashover show similar signatures. The initial pre-breakdown current spike, a flat constant current phase, and the breakdown phase with voltage collapse and current surge differ mostly in magnitude. Given these similarities, a model, consisting of the initial current spike corresponding to a fast precursor streamer (ionization wave led by a photoionizing front), the flat current stage as the heating or glow phase, and the terminal avalanche and gap closure, is applied to vacuum surface flashover. A simple analytical approximation based on the resistivity changes induced in the vacuum ... continued below

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8 p.

Creation Information

Elizondo, J.M.; Krogh, M.L.; Smith, D.; Stolz, D.; Wright, S.N.; Sampayan, S.E. et al. July 1, 1997.

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  • Allied-Signal Aerospace Company
    Publisher Info: Allied-Signal Aerospace Co., Kansas City, MO (United States). Kansas City Div.
    Place of Publication: Kansas City, Missouri

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Description

Pre-breakdown current traces obtained during high pressure gas breakdown and vacuum surface flashover show similar signatures. The initial pre-breakdown current spike, a flat constant current phase, and the breakdown phase with voltage collapse and current surge differ mostly in magnitude. Given these similarities, a model, consisting of the initial current spike corresponding to a fast precursor streamer (ionization wave led by a photoionizing front), the flat current stage as the heating or glow phase, and the terminal avalanche and gap closure, is applied to vacuum surface flashover. A simple analytical approximation based on the resistivity changes induced in the vacuum and dielectric surface is presented. The approximation yields an excellent fit to pre-breakdown time delay vs applied field for previously published experimental data. A detailed kinetics model that includes surface and gas contributions is being developed based in the initial approximation.

Physical Description

8 p.

Notes

INIS; OSTI as DE97053642

Source

  • 11. IEEE international pulsed power conference, Baltimore, MD (United States), 29 Jun - 2 Jul 1997

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  • Other: DE97053642
  • Report No.: KCP--613-5970
  • Report No.: CONF-9706113--
  • Grant Number: AC04-76DP00613
  • Office of Scientific & Technical Information Report Number: 584980
  • Archival Resource Key: ark:/67531/metadc696506

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  • July 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Feb. 20, 2017, 3:08 p.m.

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Elizondo, J.M.; Krogh, M.L.; Smith, D.; Stolz, D.; Wright, S.N.; Sampayan, S.E. et al. Vacuum surface flashover and high pressure gas streamers, article, July 1, 1997; Kansas City, Missouri. (digital.library.unt.edu/ark:/67531/metadc696506/: accessed August 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.