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

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

doi:10.1109/ICPADM.2015.7295223

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

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

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

8 Citations (Scopus)

Abstract

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.

Original language	English
Title of host publication	Proceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	120-123
Number of pages	4
Volume	2015-October
ISBN (Print)	9781479989034
DOIs	https://doi.org/10.1109/ICPADM.2015.7295223
Publication status	Published - 2015 Oct 8
Externally published	Yes
Event	11th IEEE International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2015 - Sydney, Australia Duration: 2015 Jul 19 → 2015 Jul 22

Other

Other	11th IEEE International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2015
Country/Territory	Australia
City	Sydney
Period	15/7/19 → 15/7/22

Keywords

charge transport characteristic
dc voltage
electron-beam radiation
polyimide

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Materials Chemistry
Condensed Matter Physics

Access to Document

10.1109/ICPADM.2015.7295223

Cite this

Li, G., Li, S., Min, D., Pan, S., & Zhao, C. (2015). The charge transport characteristics of polyimide under electron beam and dc voltage. In Proceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials (Vol. 2015-October, pp. 120-123). [7295223] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICPADM.2015.7295223

The charge transport characteristics of polyimide under electron beam and dc voltage. / Li, Guochang; Li, Shengtao; Min, Daomin et al.

Proceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials. Vol. 2015-October Institute of Electrical and Electronics Engineers Inc., 2015. p. 120-123 7295223.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Li, G, Li, S, Min, D, Pan, S & Zhao, C 2015, The charge transport characteristics of polyimide under electron beam and dc voltage. in Proceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials. vol. 2015-October, 7295223, Institute of Electrical and Electronics Engineers Inc., pp. 120-123, 11th IEEE International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2015, Sydney, Australia, 15/7/19. https://doi.org/10.1109/ICPADM.2015.7295223

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AB - 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.

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

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