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The electric field analysis of A-B-A insulators in vacuum

  • Xi'an Jiaotong University

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper, A-B-A insulators were designed to improve the characteristics of surface flashover in vacuum by adjusting conductivity and permittivity of layer A. According to electric field theory of series dielectrics, the DC and pulsed field distributions of the insulators were calculated and the influences of conductivity and permittivity of Layer A on the electric field of vacuum-insulator-cathode triple junction and vacuum-layer A-layer B triple junction of A-B-A insulators were analyzed. It is found that by controlling the conductivity and permittivity of Layer A, the electric field of vacuum-insulator-cathode triple junction can effectively recede while the one of vacuum-layer A-layer B triple junction can be kept away from a high value. Then with the consideration of dielectric surface electrification, we analyzed the impact of layer A with different polar charges on its surface on the electric field of vacuum-insulator-cathode triple junction and vacuum-layer A-layer B triple junction. At last, we estimated the trend of surface flashover voltage in vacuum of A-B-A insulators under the condition of a continuous change of conductivity or permittivity of layer A.

Original languageEnglish
Title of host publication2009 IEEE 9th International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2009
Pages701-704
Number of pages4
DOIs
StatePublished - 2009
Event2009 IEEE 9th International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2009 - Harbin, China
Duration: 19 Jul 200923 Jul 2009

Publication series

NameProceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials

Conference

Conference2009 IEEE 9th International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2009
Country/TerritoryChina
CityHarbin
Period19/07/0923/07/09

Keywords

  • A-B-A insulators
  • Electric field distribution
  • Surface charge
  • Surface flashover in vacuum
  • Triple junction

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