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Analysis of the Cesium Distribution in the JT-60SA Negative Ion Sources for Steady Long-Pulse Operation
https://repo.qst.go.jp/records/79503
https://repo.qst.go.jp/records/795032800e07c-e068-4d92-b7cd-2b8dda63e4dc
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-03-13 | |||||
| タイトル | ||||||
| タイトル | Analysis of the Cesium Distribution in the JT-60SA Negative Ion Sources for Steady Long-Pulse Operation | |||||
| 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 |
Yoshida, Masafumi
× Yoshida, Masafumi× Oohara, Wataru× Ichikawa, Masahiro× Hiratsuka, Junichi× mae quinones Saquilayan, Glynnis× Umeda, Naotaka× Kojima, Atsushi× Kashiwagi, Mieko× Masahiro, Ichikawa× Junichi, Hiratsuka× mae quinones Saquilayan, Glynnis× Naotaka, Umeda× Atsushi, Kojima× Mieko, Kashiwagi |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | To realize stable negative ion beams for 100 s required in the neutral beam injector of JT-60SA, a physical model to control cesium (Cs) distribution inside the negative ion source has been developed in order to maintain the stable negative ion production at the plasma grid (PG) surface with Cs. In this work, to quantitatively evaluate Cs coverage on the PG, a three-dimensional Cs transportation code was introduced to consider the spatial Cs distribution in the source. The spatial temperature distribution of the chamber wall was also introduced in this model. As a result, the reasonable variation of the Cs coverage for 100 s was obtained, compared to that in the initial model. Based on the modified model, the operational temperature of the chamber wall was proposed to be less than 60 ℃ to suppress the desorption of Cs in the chamber wall and to sustain the stable negative ion production. In addition, it was also suggested that a slightly higher wall temperature before the operation leads to a decrease in the amount of Cs stored at the chamber wall, resulting in suppression of Cs consumption in the ion source. | |||||
| 書誌情報 |
Review of Scientific Instruments 巻 91, p. 033313, 発行日 2020-03 |
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| 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 | 10.1063/1.5131103 | |||||
| 関連サイト | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1063/1.5131103 | |||||
