Breakdown Phenomena in the Negative Ion Source of 500 keV Negative-Ion Based NBI System on JT-60U

Author

Hanada, Masaya ; Ikeda, Yoshitaka ; Kamada, Masaki ; Kikuchi, Katsumi ; Komata, Masao ; Mogaki, Kazuhiko ; Umeda, Naotaka ; Usui, Katsutomi ; Grisham, Larry R. ; Kobayashi, Shinichi

Author_Institution

Japan Atomic Energy Agency, Ibaraki

Volume

2

fYear

2006

fDate

25-29 Sept. 2006

Firstpage

718

Lastpage

721

Abstract

The breakdown phenomena in the 500 keV electrostatic accelerator with large FRP insulators for the fusion application was examined without the beam acceleration. When the high voltage was applied, the light emission with a broad peak at a wavelength of 420 nm was mostly emitted inside the accelerator even though breakdown did not occur. It was found that the voltage holding capability has a strong correlation with the light intensity, and that stable voltage holding was realized under the conditions in which light emission was well suppressed

Keywords

electric breakdown; electrostatic accelerators; ion sources; organic insulating materials; 420 nm; 500 keV; JT-60U; NBI system; breakdown phenomena; electrostatic accelerator; fusion application; large FRP insulators; light emission; negative ion source; voltage holding capability; Acceleration; Breakdown voltage; Electric breakdown; Electrostatics; Fiber reinforced plastics; Ion accelerators; Ion sources; Plasma accelerators; Plasma sources; Vacuum breakdown;

fLanguage

English

Publisher

ieee

Conference_Titel

Discharges and Electrical Insulation in Vacuum, 2006. ISDEIV '06. International Symposium on

Conference_Location

Matsue

ISSN

1093-2941

Print_ISBN

1-4244-0191-7

Electronic_ISBN

1093-2941

Type

conf

DOI

10.1109/DEIV.2006.357403

Filename

4194984