@article{36bb0c7c3ac545d9b8ef64adc7b58e0c,
title = "Quantification of Turbulent Driving Forces for the Geodesic Acoustic Mode in the JFT-2M Tokamak",
abstract = "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.",
author = "T. Kobayashi and M. Sasaki and T. Ido and K. Kamiya and Y. Miura and Y. Nagashima and K. Ida and S. Inagaki and A. Fujisawa and Itoh, {S. I.} and K. Itoh",
note = "Funding Information: We thank G. D. Conway, K. Hallatschek, and G. Birkenmeier for useful discussions, and the late H. Maeda, Y. Hamada, M. Mori, Y. Kamada, S. Sakakibara, and K. Hoshino for strong support. This work is partly supported by the Grant-in-Aid for Scientific Research of Japan Society for the Promotion of Science, Japan (Grants No. 17K14898, No. 16K18335, No. 16H02442, No. 15H02155). The collaboration programs of National Institute for Quantum and Radiological Science and Technology and of Research Institute for Applied Mechanics, Kyushu University are also appreciated. ",
year = "2018",
month = jan,
day = "26",
doi = "10.1103/PhysRevLett.120.045002",
language = "English",
volume = "120",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "4",
}