ダウンロード数: 42
このアイテムのファイル:
ファイル | 記述 | サイズ | フォーマット | |
---|---|---|---|---|
s41598-022-19747-8.pdf | 1.62 MB | Adobe PDF | 見る/開く |
タイトル: | Spatially resolved measurement of helium atom emission line spectrum in scrape-off layer of Heliotron J by near-infrared Stokes spectropolarimetry |
著者: | Chatani, Tomoki Shikama, Taiichi Ueno, Yohei Kado, Shinichiro Kawazome, Hayato Minami, Takashi Matoike, Ryota Murakumo, Minato Kobayashi, Shinji Ohshima, Shinsuke https://orcid.org/0000-0003-1341-4969 (unconfirmed) Iwata, Akihiro Oishi, Tetsutaro Ishizawa, Akihiro https://orcid.org/0000-0002-5323-8448 (unconfirmed) Nakamura, Yuji https://orcid.org/0000-0002-3196-0296 (unconfirmed) Okada, Hiroyuki Konoshima, Shigeru Mizuuchi, Tohru Nagasaki, Kazunobu https://orcid.org/0000-0001-6423-1754 (unconfirmed) Hasuo, Masahiro https://orcid.org/0000-0001-8441-2640 (unconfirmed) |
著者名の別形: | 茶谷, 智樹 四竃, 泰一 上野, 陽平 門, 信一郎 川染, 勇人 南, 貴司 的池, 遼太 村雲, 南斗 小林, 進二 大島, 慎介 岩田, 晃拓 大石, 鉄太郎 石澤, 明宏 中村, 祐司 岡田, 浩之 木島, 滋 水内, 亨 長﨑, 百伸 蓮尾, 昌裕 |
キーワード: | Magnetically confined plasmas Near-infrared spectroscopy |
発行日: | 2022 |
出版者: | Springer Nature |
誌名: | Scientific Reports |
巻: | 12 |
論文番号: | 15567 |
抄録: | For plasma spectroscopy, Stokes spectropolarimetry is used as a method to spatially invert the viewing-chord-integrated spectrum on the basis of the correspondence between the given magnetic field profile along the viewing chord and the Zeeman effect appearing on the spectrum. Its application to fusion-related toroidal plasmas is, however, limited owing to the low spatial resolution as a result of the difficulty in distinguishing between the Zeeman and Doppler effects. To resolve this issue, we increased the relative magnitude of the Zeeman effect by observing a near-infrared emission line on the basis of the greater wavelength dependence of the Zeeman effect than of the Doppler effect. By utilizing the increased Zeeman effect, we are able to invert the measured spectrum with a high spatial resolution by Monte Carlo particle transport simulation and by reproducing the measured spectra with the semiempirical adjustment of the recycling condition at the first walls. The inversion result revealed that when the momentum exchange collisions of atoms are negligible, the velocity distribution of core-fueling atoms is mainly determined by the initial distribution at the time of recycling. The inversion result was compared with that obtained using a two-point emission model used in previous studies. The latter approximately reflects the parameters of atoms near the emissivity peak. |
記述: | 1視線の観測のみで核融合プラズマ中のヘリウム近赤外輝線の発光分布を推定. 京都大学プレスリリース. 2022-09-26. |
著作権等: | © The Author(s) 2022 This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. |
URI: | http://hdl.handle.net/2433/276372 |
DOI(出版社版): | 10.1038/s41598-022-19747-8 |
PubMed ID: | 36151115 |
関連リンク: | https://www.t.kyoto-u.ac.jp/ja/research/topics/k6l1jw |
出現コレクション: | 学術雑誌掲載論文等 |
このアイテムは次のライセンスが設定されています: クリエイティブ・コモンズ・ライセンス