| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2025-05-12 |
| タイトル |
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タイトル |
Operational regime and confinement property of JT-60SA L-mode plasma in the first plasma operation phase |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
Ohtani Yoshiaki
Yoshida Maiko
Nakano Tomohide
Sano Ryuichi
Wakatsuki Takuma
Inoue Shizuo
Urano Hajime
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
Characteristics and operational regimes of electron density, electron temperature, and energy confinement have been investigated in the JT-60SA first plasma operation phase. Working gases for these plasma discharges are hydrogen (H2) and helium (He). A plasma current Ip of 1.2 MA has been achieved at a toroidal magnetic field BT of 2 T. In Ip = 1 MA, the operational regimes of a line-averaged electron density ￣ne are 2.7 × 10^18 ? 5.2 × 10^18 m^?3 for the He-gas injected plasma and 2.5 × 10^18 ? 6.5 × 10^18 m^?3 for the H2-gas injected plasma. A maximum electron temperature in this operation phase is 2.0 keV in the core region in the case of He-gas-injection and 1.13-MW electron cyclotron resonant heating (ECH). A global energy confinement time τE of L-mode divertor plasmas for both the He-gas-injected and H2-gas-injected plasmas strongly depends on the total input power. In the similar total input power regimes, τE increases with an increase in ￣ne, leading to the possibility of these plasmas in the linear ohmic confinement regime. The global energy confinement time of the H2-gasinjected plasmas, which is in the range of 100 - 200 ms, is compared with the ITER89-P scaling law, resulting in τE being on and a little below the scaling. The dependence of τE on ￣ne matches the neo-Alcator scaling law and reaches the ITER89-P scaling law in higher-density plasma in the case of the similar total input power regimes. |
| 書誌情報 |
Plasma Physics and Controlled Fusion
巻 67,
号 055042,
発行日 2025-05
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| 出版者 |
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出版者 |
IOP science |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.1088/1361-6587/add20b |
