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| ファイル | 記述 | サイズ | フォーマット | |
|---|---|---|---|---|
| s41598-022-23559-1.pdf | 2.46 MB | Adobe PDF | 見る/開く |
| タイトル: | Spatiotemporal dynamics of high-wavenumber turbulence in a basic laboratory plasma |
| 著者: | Kawachi, Yuichi Sasaki, Makoto Kosuga, Yusuke Terasaka, Kenichiro Nishizawa, Takashi Yamada, Takuma Kasuya, Naohiro Moon, Chanho Inagaki, Shigeru |
| 著者名の別形: | 河内, 裕一 佐々木, 真 小菅, 佑輔 寺坂, 健一郎 西澤, 敬之 山田, 琢磨 糟谷, 直宏 文, 贊鎬 稲垣, 滋 |
| キーワード: | Magnetically confined plasmas Plasma physics |
| 発行日: | 2022 |
| 出版者: | Springer Nature |
| 誌名: | Scientific Reports |
| 巻: | 12 |
| 論文番号: | 19799 |
| 抄録: | High-spatial resolution observation of high-wavenumber broadband turbulence is achieved by controlling the magnetic field to be relatively low and measuring with a azimuthally arranged multi-channel Langmuir array in a basic laboratory plasma. The observed turbulence consists of narrowband low-frequency fluctuations and broadband high-frequency turbulent fluctuations. The low-frequency fluctuations have a frequency of about 0.7 times the ion cyclotron frequency and a spatial scale of 1/10 of the ion inertial scale. In comparison, high-frequency fluctuations have a higher frequency than the ion cyclotron frequency and spatial scales of 1/10–1/40 of the ion inertial scale. Two-dimensional correlation analysis evaluates the spatial and temporal correlation lengths and reveals that the high-wavenumber broadband fluctuations have turbulent characteristics. The measurements give us further understanding of small scale turbulence in space and fusion plasmas. |
| 記述: | ミクロなプラズマの揺らぎを拡大して観る --プラズマ基礎実験の新展開--. 京都大学プレスリリース. 2022-12-22. |
| 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/2433/278056 |
| DOI(出版社版): | 10.1038/s41598-022-23559-1 |
| PubMed ID: | 36509803 |
| 関連リンク: | http://www.iae.kyoto-u.ac.jp/new-iae/NewsRelease/JP/2022/12/22-110000.html |
| 出現コレクション: | 学術雑誌掲載論文等 |
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