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| タイトル: | Flow damping due to stochastization of the magnetic field |
| 著者: | Ida, K. Yoshinuma, M. Tsuchiya, H. Kobayashi, T. Suzuki, C. Yokoyama, M. Shimizu, A. Nagaoka, K. Inagaki, S. Itoh, K. Akiyama, T. Goto, M. Goto, T. Hasuo, M. Hidalgo, C. Ichiguchi, K. Ishizawa, A. Jakubowski, M. Kamiya, K. Kasahara, H. Kawamura, G. Pablant, N. Kato, D. Kobayashi, M. Morita, S. Mukai, K. Murakami, I. Murakami, S. Narushima, Y. Nunami, M. Ohdach, S. Ohno, N. Sakakibara, S. Osakabe, M. Seki, T. Shimozuma, T. Shoji, M. Sudo, S. Tanaka, K. Tokuzawa, T. Todo, Y. Wang, H. Fujita, T. Yamada, H. Takeiri, Y. Mutoh, T. Imagawa, S. Mito, T. Nagayama, Y. Watanabe, K. Y. Ashikawa, N. Chikaraishi, H. Ejiri, A. Hamaguchi, S. Furukawa, M. Igami, H. Isobe, M. Masuzaki, S. Morisaki, T. Motojima, G. Nagasaki, K. Nakano, H. Oya, Y. Yamamoto, T. Suzuki, Y. Sakamoto, R. Sakamoto, M. Sanpei, A. Takahashi, H. Tokitani, M. Ueda, Y. Yoshimura, Y. Yamamoto, S. Nishimura, K. Idei, H. Sugama, H. Isayama, A. Kitajima, S. Masamune, S. Shinohara, K. Bawankar, P. S. Bernard, E. Von Berkel, M. Funaba, H. Nishimura, S. Huang, X. L. Ii, T. Ido, T. Ikeda, K. Kamio, S. Kumazawa, R. Moon, C. Muto, S. Miyazawa, J. Ming, T. Ogawa, K. Nakamura, Y. Ozaki, T. Oishi, T. Ohno, M. Pandya, S. Seki, R. Sano, R. Saito, K. Sakaue, H. Emoto, M. Takemura, Y. Tsumori, K. Tamura, N. Tanaka, H. Toi, K. Wieland, B. Yamada, I. Yasuhara, R. Zhang, H. Kaneko, O. Evans, T. Komori, A. Dinklage, A. Du, X. Fujii, K. |
| 著者名の別形: | 蓮尾, 昌裕 長﨑, 百伸 山本, 聡 中村, 祐司 |
| キーワード: | Physical sciences Fluids and plasma physics |
| 発行日: | 8-Jan-2015 |
| 出版者: | Nature Publishing Group |
| 誌名: | Nature Communications |
| 巻: | 6 |
| 論文番号: | 5816 |
| 抄録: | The driving and damping mechanism of plasma flow is an important issue because flow shear has a significant impact on turbulence in a plasma, which determines the transport in the magnetized plasma. Here we report clear evidence of the flow damping due to stochastization of the magnetic field. Abrupt damping of the toroidal flow associated with a transition from a nested magnetic flux surface to a stochastic magnetic field is observed when the magnetic shear at the rational surface decreases to 0.5 in the large helical device. This flow damping and resulting profile flattening are much stronger than expected from the Rechester-Rosenbluth model. The toroidal flow shear shows a linear decay, while the ion temperature gradient shows an exponential decay. This observation suggests that the flow damping is due to the change in the non-diffusive term of momentum transport. |
| 著作権等: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| URI: | http://hdl.handle.net/2433/209999 |
| DOI(出版社版): | 10.1038/ncomms6816 |
| PubMed ID: | 25569268 |
| 出現コレクション: | 学術雑誌掲載論文等 |
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