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Long-pulse acceleration of 1MeV negative ion beams toward ITER and JT-60SA neutral beam injectors
https://repo.qst.go.jp/records/54977
https://repo.qst.go.jp/records/54977ad709a48-5b31-4c88-b845-6cd5f425d28e
| Item type | 会議発表論文 / Conference Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2019-02-07 | |||||
| タイトル | ||||||
| タイトル | Long-pulse acceleration of 1MeV negative ion beams toward ITER and JT-60SA neutral beam injectors | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_5794 | |||||
| 資源タイプ | conference paper | |||||
| 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 |
平塚, 淳一
× 平塚, 淳一× 小島, 有志× 梅田, 尚孝× 花田, 磨砂也× 柏木, 美恵子× 吉田, 雅史× 錦織, 良× 市川, 雅浩× 渡邊, 和弘× 戸張, 博之× 大楽, 正幸× 山中, 晴彦× 阿部, 宏幸× 川又, 亮一× 柴田, 直樹× 前島, 哲也× 照沼, 勇人× 小田, 勇樹× 秋野, 昇× 藻垣, 和彦× 佐々木, 駿一× 関, 則和× 根本, 修司× 清水, 達夫× 遠藤, 安栄× 宮本, 賢治× 山納, 康× R., Grisham L.× 平塚 淳一× 小島 有志× 梅田 尚孝× 花田 磨砂也× 柏木 美恵子× 吉田 雅史× 錦織 良× 市川 雅浩× 渡邊 和弘× 戸張 博之× 大楽 正幸× 山中 晴彦× 阿部 宏幸× 川又 亮一× 柴田 直樹× 前島 哲也× 小田 勇樹× 秋野 昇× 藻垣 和彦× 佐々木 駿一× 関 則和× 根本 修司× 清水 達夫× 遠藤 安栄 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Pulse duration of the ITER-relevant high power density hydrogen negative ion beams at 1 MeV has been successfully extended from 0.4 s to 60 s by using a prototype Multi-Aperture and Multi-Grid accelerator for the ITER and JT-60SA neutral beam systems. This significant progress was achieved based on developments of technology for the design of a voltage holding capability and improvement of a beam optics, which are directly applicable to ITER and JT-60SA. In the design of the voltage holding capability, one of critical remaining issues was a multi-grid effect. This was experimentally investigated by using a multi-grid configuration. The voltage holding capability predicted based on this experimental investigation showed good agreement with experimental results obtained in the JT-60SA negative ion source within 10 % deviation. This result was also applied to improve the beam optics by tuning the acceleration gap. In addition, the extractor configuration was optimized. These tunings significantly contributed to reduce the grid power load from 15 % to 9 % of the total beam acceleration power and to increase the current density up to 1.4 times higher. As the result, 0.97 MeV, 190 A/m2 negative ion beams were generated stably without any breakdowns and any thermal damages on the acceleration grids. This pulse length of the beams with the ITER-relevant energy and current density is the longest one in the world and contributes to assure the 1 MeV accelerator for the ITER NB system. | |||||
| 書誌情報 |
FEC 2016 proceedings 巻 26, p. 1-8, 発行日 2016-10 |
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| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://nucleus.iaea.org/sites/fusionportal/Shared%20Documents/FEC%202016/fec2016-preprints/preprint0246.pdf | |||||
| 関連名称 | https://nucleus.iaea.org/sites/fusionportal/Shared%20Documents/FEC%202016/fec2016-preprints/preprint0246.pdf | |||||
