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Development of a High-Current Hydrogen-Negative Ion Source for LHD-NBI System

http://hdl.handle.net/10655/2532
http://hdl.handle.net/10655/2532
fef35021-af6a-4838-9ddc-1b205a02c081
Item type 研究報告書 / Research Paper(1)
公開日 2010-02-05
タイトル
タイトル Development of a High-Current Hydrogen-Negative Ion Source for LHD-NBI System
言語 en
言語
言語 eng
キーワード
言語 en
主題Scheme Other
主題 NBI system
キーワード
言語 en
主題Scheme Other
主題 negative ion source
キーワード
言語 en
主題Scheme Other
主題 Large Helical Device
キーワード
言語 en
主題Scheme Other
主題 cesium-seeded volume production
キーワード
言語 en
主題Scheme Other
主題 external magnetic filter
キーワード
言語 en
主題Scheme Other
主題 aperture displacement technique
キーワード
言語 en
主題Scheme Other
主題 long-pulse beam production
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_18ws
資源タイプ research report
アクセス権
アクセス権 metadata only access
アクセス権URI http://purl.org/coar/access_right/c_14cb
著者 "Takeiri, Y.

× "Takeiri, Y.

en "Takeiri, Y.

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Osakabe, M.

× Osakabe, M.

en Osakabe, M.

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Tsumori, K.

× Tsumori, K.

en Tsumori, K.

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Oka, Y.

× Oka, Y.

en Oka, Y.

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Kaneko, O.

× Kaneko, O.

en Kaneko, O.

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Asano, E.

× Asano, E.

en Asano, E.

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Kawamoto, T.

× Kawamoto, T.

en Kawamoto, T.

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Akiyama, R.

× Akiyama, R.

en Akiyama, R.

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Tanaka, M."

× Tanaka, M."

en Tanaka, M."

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抄録
内容記述タイプ Abstract
内容記述 "We have developed a high-current hydrogen-negative ion source for a negative-ion-based NBI system in Large Helical Device (LHD). The ion source is a cesium-seeded volume-production source equipped with an external magnetic filter. An arc chamber is rectangular, the dimensions of which are 35 cm x 145 cm in cross section and 21 cm in depth. A three-grid single-stage accelerator is divided into five sections longitudinally, each of which has 154 (14 x 11) apertures in an area of 25 cm x 25 cm. The ion source was tested in the negative-NBI teststand, and 25 A of the negative ion beam is incident on a beamdump 13 m downstream with an energy of 104 keV for 1 sec. Multibeamlets of 770 are focused on a focal point 13 m downstream with an averaged divergence angle of 10 mrad by the geometrical arrangement of five sections of grid and the aperture displacement technique of the grounded grid. A uniform beam in the vertical direction over 125 cm is obtained with uniform plasma production in the arc chamber by balancing individual arc currents flowing through each filament. Long-pulse beam production was performed, and 1.3 MW of the negative ion beam is incident on the beamdump for 10 sec, and the temperature rise of the cooling water is almost saturated for the extraction and the grounded grids. These results satisfy the first-step specification of the LHD-NBI system."
書誌情報 en : Research Report NIFS-Series

発行日 1998-08-01
報告書番号
NIFS-557
ISSN
収録物識別子タイプ ISSN
収録物識別子 0915-633X
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Cite as

"Takeiri, Y., Osakabe, M., Tsumori, K., Oka, Y., Kaneko, O., Asano, E., Kawamoto, T., Akiyama, R., Tanaka, M.", 1998, Development of a High-Current Hydrogen-Negative Ion Source for LHD-NBI System.

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