Development process of impulse surface discharge in vacuum

Author

Nakano, Yoshiaki ; Kojima, H. ; Hayakawa, Naoki ; Tsuchiya, K. ; Okubo, Hisanori

Author_Institution

Nagoya Univ., Nagoya, Japan

fYear

2012

fDate

2-7 Sept. 2012

Firstpage

125

Lastpage

128

Abstract

We investigated the charge activity on alumina dielectrics in the development process of impulse surface discharge in vacuum. We clarified the charge activity in pre-discharge stage by ultra-high speed and high sensitivity measurement. We also measured the fast-framing images of surface flashover propagation synchronously with current waveforms. We found that the charge activities are classified into three stages, i.e. (I) pre-discharge, (II) surface flashover initiation, and (III) expansion, in the development process of surface discharge in vacuum.

Keywords

alumina; dielectric materials; flashover; surface discharges; vacuum circuit breakers; Al₂O₃; alumina dielectrics; charge activity; current waveform; development process expansion; framing image measurement; impulse surface discharge; predischarge stage; sensitivity measurement; surface flashover initiation; surface flashover propagation; vacuum; Cathodes; Discharges (electric); Flashover; Surface discharges; Surface treatment; Surface waves;

fLanguage

English

Publisher

ieee

Conference_Titel

Discharges and Electrical Insulation in Vacuum (ISDEIV), 2012 25th International Symposium on

Conference_Location

Tomsk

ISSN

1093-2941

Print_ISBN

978-1-4673-1263-9

Electronic_ISBN

1093-2941

Type

conf

DOI

10.1109/DEIV.2012.6412467

Filename

6412467