Insulator size effect on electron-irradiated quartz

Author

Song, Z.G. ; Ong, C.K. ; Gong, H.

Author_Institution

Dept. of Phys., Nat. Univ. of Singapore, Singapore

Volume

4

Issue

1

fYear

1997

fDate

2/1/1997 12:00:00 AM

Firstpage

88

Lastpage

91

Abstract

A time-resolved current experiment measuring separately the surface and bulk currents flowing through an insulating sample under electron beam irradiation employing a scanning electron microscope is performed to investigate charging and flashover phenomena. A set of metallic apertures of various values of radius are used to vary the area of the insulator. It is observed that the bulk current decreases monotonically with time until reaching a constant value, while the surface current exhibits two different trends: decreasing monotonically with time, and decreasing with time at first and then increasing. Such observations are related to the establishment of a dynamic equilibrium between electron trapping and detrapping, as well as the flashover behavior, and depends on the insulator size and the experimental conditions

Keywords

ceramic insulation; electron beam effects; flashover; quartz; space charge; SiO₂; bulk current; charging; electron beam irradiation; electron detrapping; electron trapping; flashover; insulator size; quartz; scanning electron microscopy; surface current; time-resolved current; Apertures; Current measurement; Dynamic equilibrium; Electron beams; Flashover; Insulation; Metal-insulator structures; Performance evaluation; Scanning electron microscopy; Surface charging;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.590873

Filename

590873