Quantification of Turbulent Driving Forces for the Geodesic Acoustic Mode in the JFT-2M Tokamak

• Kobayashi, Tatsuya

• Sasaki, M.

• IDO, Takeshi

• Kamiya, K.

• MIURA, Y.

• Nagashima, Y.

• IDA, Katsumi

• INAGAKI, Shigeru

• FUJISAWA, Akihide

• ITOH, Sanae -I.

• ITOH, Kimitaka

抄録

0000-0001-5669-1937

We investigate spatial structures of turbulence and turbulent transport modulated by the geodesic acoustic mode (GAM), from which the excitation mechanism of the GAM is discussed. The GAM is found to be predominantly excited through a localized Reynolds stress force, rather than the dynamic shearing force. The evaluated growth rate is larger than the linear damping coefficients and is on the same order of magnitude as the effective growth rate evaluated from time evolution in the GAM kinetic energy.

収録刊行物

• Physical review letters

  Physical review letters 120 (4), 045002-, 2018-01-26

  APS

キーワード

• General Physics and Astronomy

詳細情報

• CRID: 1050290473053667968
• NII論文ID: 120007176989
• NII書誌ID: AA00773679
• ISSN: 00319007
• ISSN: 10797114
• DOI: 10.1103/physrevlett.120.045002
• HANDLE: 10655/00012738
• Web Site: https://nifs-repository.repo.nii.ac.jp/records/10761
• Web Site: https://link.aps.org/article/10.1103/PhysRevLett.120.045002
• Web Site: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.120.045002/fulltext
• 本文言語コード: en
• 資料種別: journal article
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