The charge transport characteristics of polyimide under electron beam and dc voltage

Guochang Li, Shengtao Li, Daomin Min, Shaoming Pan, Changhao Zhao

研究成果: Conference contribution

8 被引用数 (Scopus)

抄録

Deposited charges in dielectric material under electron-beam radiation have an important influence on dc vacuum surface flashover. This paper investigates the charge transport characteristics of polyimide under electron-beam radiation and dc voltage. Based on the actual size of electrodes and polyimide, a physical model of electron-beam radiation is proposed. Considered the processes of charge deposition and transport and accumulation in polyimide radiated by low-energy electrons (electron energy: 5-30 keV, electron-beam density: 10-10 ∼10-7A/m2), the distributions of space charge, potential and electric field can be obtained, and the total electric field at cathode triple junction under the combined action of electron radiation and dc voltage are analyzed. The calculation results indicate that when the electron-beam density is less relatively (-9 A/m2), the weakening effect of built-in electric field on applied electric field is unobvious. With the increase of electronbeam density, the built-in electric field is gradually increased, resulting in the decrease of total electric field at the cathode triple junction. The total electric field is 8×105 V/m under the electronbeam density of 10-7 A/m2. It will reduce the initial electron emission at the cathode triple junction, and may enhance surface flashover voltage of dielectric material. Further experiment study will be carried out.

本文言語English
ホスト出版物のタイトルProceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials
出版社Institute of Electrical and Electronics Engineers Inc.
ページ120-123
ページ数4
2015-October
ISBN(印刷版)9781479989034
DOI
出版ステータスPublished - 2015 10 8
外部発表はい
イベント11th IEEE International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2015 - Sydney, Australia
継続期間: 2015 7 192015 7 22

Other

Other11th IEEE International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2015
国/地域Australia
CitySydney
Period15/7/1915/7/22

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 材料化学
  • 凝縮系物理学

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