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

T. Kobayashi, M. Sasaki, T. Ido, K. Kamiya, Y. Miura, Y. Nagashima, K. Ida, S. Inagaki, A. Fujisawa, S. I. Itoh, K. Itoh

研究成果: Contribution to journalArticle査読

14 被引用数 (Scopus)

抄録

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.

本文言語英語
論文番号045002
ジャーナルPhysical review letters
120
4
DOI
出版ステータス出版済み - 1 26 2018

All Science Journal Classification (ASJC) codes

  • 物理学および天文学(全般)

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