Surface discharge related properties of fiberglass reinforced plastic insulator for use in neutral beam injector of JT-60U.

Surface discharge related properties of fiberglass reinforced plastic insulator for use in neutral beam injector of JT-60U. Research Abstract Details 

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Surface discharge related properties of fiberglass reinforced plastic insulator for use in neutral beam injector of JT-60U. Abstract Text:

Y Yamano,M Takahashi,S Kobayashi,M Hanada,Y Ikeda,

Neutral beam injection (NBI) used for JT-60U is required to generate negative ions of 500 keV energies. To produce such high-energy ions, three-stage electrostatic accelerators consisting of three insulator rings made of fiberglass reinforced plastic (FRP) are applied. The surface discharges along FRP insulators are one of the most serious problems in the development of NBI. To increase the hold-off voltage against surface flashover events, it is necessary to investigate the FRP insulator properties related to surface discharges in vacuum. This paper describes surface flashover characteristics for FRP and alumina samples under vacuum condition. The results show that the fold-off voltages for FRP samples are inferior to those of alumina ceramics. In addition, measurement results of surface resistivity and volume resistivity under vacuum and atmospheric conditions, secondary electron emission characteristics, and cathodoluminescence under some keV electron beam irradiation are also reported. These are important parameters to analyze surface discharge of insulators in vacuum.

Surface discharge related properties of fiberglass reinforced plastic insulator for use in neutral beam injector of JT-60U. Publishing Authors By Initials

Y Yamano,M Takahashi,S Kobayashi,M Hanada,Y Ikeda,

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Surface discharge related properties of fiberglass reinforced plastic insulator for use in neutral beam injector of JT-60U. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: The Review of scientific instruments

VOLUME: 79

Page Numbers: 02A524

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ISSN: 0034-6748

DAY: 4

MONTH: Feb

YEAR: 2008

Surface discharge related properties of fiberglass reinforced plastic insulator for use in neutral beam injector of JT-60U. Information

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LANGUAGE: eng

NlmUniqueID: 405571

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Grant and Affiliation Information for Surface discharge related properties of fiberglass reinforced plastic insulator for use in neutral beam injector of JT-60U.

AFFILIATION: School of Science and Engineering, Saitama University, Japan.

Country: United States

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MEDLINETA: Rev Sci Instrum

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