Experimental observation and numerical calculation of space charge formation in gamma-irradiated polyethylene

Tatsuo Takada, Hironori Kitajima, Yasuhiro Tanaka, Yoshimichi Ohki

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

In this paper, experimental results and their simulation on the residual space charge formation in γ-irradiated low density polyethylene (LDPE) are summarized. To measure the space charge distribution, the pulsed electroacoustic (PEA) method was employed. From the measurement result, it became clear that a large amount of positive charges exist near the cathode in γ-irradiated LDPE with dc voltage application, and that these positive charges enhance the electric field at the interface between the cathode and LDPE. On the other hand, almost no space charge was observed in non-irradiated LDPE. It is considered that the mobile carriers are electrons, and that such moved electrons and the remaining positive ions form the observed space charge distribution. The observed space charge distribution was simulated numerically based on a model where the conduction is governed by hopping of electrons. A good agreement between the simulation and the observation was obtained.

Original languageEnglish
Pages105-108
Number of pages4
Publication statusPublished - 1996 Dec 1
Externally publishedYes
EventProceedings of Joint Conference: 1996 Asian International Conference on Dielectrics & Electrical Insulation Diagnosis, 96'AICDEI & 4th-JCCEID - Xi'an, China
Duration: 1996 Oct 81996 Oct 11

Other

OtherProceedings of Joint Conference: 1996 Asian International Conference on Dielectrics & Electrical Insulation Diagnosis, 96'AICDEI & 4th-JCCEID
CityXi'an, China
Period96/10/896/10/11

ASJC Scopus subject areas

  • Engineering(all)

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    Takada, T., Kitajima, H., Tanaka, Y., & Ohki, Y. (1996). Experimental observation and numerical calculation of space charge formation in gamma-irradiated polyethylene. 105-108. Paper presented at Proceedings of Joint Conference: 1996 Asian International Conference on Dielectrics & Electrical Insulation Diagnosis, 96'AICDEI & 4th-JCCEID, Xi'an, China, .