Direct observation of space charge evolution in e-irradiated Kapton films

Author

Cals, Marie-Pierre ; Marque, Jean-Pierre ; Alquié, Claude

Author_Institution

ONERA, Chatillon, France

Volume

27

Issue

4

fYear

1992

fDate

8/1/1992 12:00:00 AM

Firstpage

763

Lastpage

767

Abstract

The pressure wave propagation method was applied to analyze in a vacuum the evolution of the space charge in electron-irradiated Kapton H films. The 125 μm thick films were irradiated in a vacuum chamber with a monoenergetic electron beam in the 10 to 50 keV energy range. The method allows direct observation of the depth of penetration of electrons and first results on Kapton are presented. The space charge generated in the irradiated and nonirradiated regions was observed during and after the irradiation process. The space charge is influenced by electric field-assisted detrapping of incident electrons and their interaction with the lattice as they drift. Interfacial effects are indicated by the buildup of a negative charge layer at the metal-polymer interface

Keywords

electron beam effects; electron traps; polymer films; space charge; 10 to 50 keV; Kapton films; depth of penetration; electric field-assisted detrapping; electron irradiation; irradiation process; metal-polymer interface; monoenergetic electron beam; negative charge layer; pressure wave propagation method; space charge evolution; Aerospace industry; Charge measurement; Current measurement; Electrodes; Electrons; Elementary particle vacuum; Polymer films; Pressure measurement; Space charge; Space vehicles;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.155794

Filename

155794