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Achievement of stable negative ion production with Cs-seeded for long pulse beam operation in the prototype of Cs-seeded negative ion source for JT-60SA
https://repo.qst.go.jp/records/78941
https://repo.qst.go.jp/records/789416b5d17ca-0665-412d-9978-ee8d47548e3e
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-02-10 | |||||
| タイトル | ||||||
| タイトル | Achievement of stable negative ion production with Cs-seeded for long pulse beam operation in the prototype of Cs-seeded negative ion source for JT-60SA | |||||
| 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_6501 | |||||
| 資源タイプ | journal article | |||||
| 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 |
Ichikawa, Masahiro
× Ichikawa, Masahiro× Kojima, Atsushi× Hiratsuka, Junichi× Yoshida, Masafumi× Umeda, Naotaka× mae quinones Saquilayan, Glynnis× Watanabe, Kazuhiro× Tobari, Hiroyuki× Kashiwagi, Mieko× Masahiro, Ichikawa× Atsushi, Kojima× Junichi, Hiratsuka× Naotaka, Umeda× mae quinones Saquilayan, Glynnis× Kazuhiro, Watanabe× Hiroyuki, Tobari× Mieko, Kashiwagi |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Long pulse negative ion beams of 500 keV and 154 A/m2 for 118 s have been achieved for the first time, which exceeds the requirement of the JT-60SA negative ion source. In order to solve the issues of such long pulse beams, the fast cutoff system of the power supply aims to reduce the surge current and to extend the lifetime of filaments and the suppression method of excess cesium (Cs) accumulation on the plasma grid (PG) to achieve stable negative ion production. By developing the fast cutoff system using a field programmable gate array unit for the arc power supply, the cutoff time has been reduced to 1/10 that of the original system and the lifetime of the filament was extended by three times. In order to achieve stable negative ion production, incoming Cs on the PG surface has been reduced by keeping the chamber wall temperature below 40 ○C. As a result, a stable beam current drift of <6% has been achieved for the 118 s duration. |
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| 書誌情報 |
Review of Scientific Instruments 巻 91, p. 023502, 発行日 2020-02 |
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| 出版者 | ||||||
| 出版者 | AIP Publishing | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0034-6748 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1063/1.5130436 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://aip.scitation.org/doi/10.1063/1.5130436 | |||||
