@article{oai:nifs-repository.repo.nii.ac.jp:00000462,
 author = {Toi,  K. and Watanabe,  F. and Tokuzawa,  T. and Ida,  K. and Morita,  S. and Ido,  T. and Shimizu,  A. and Isobe,  M. and Ogawa,  K. and Spong,  D. A. and Todo,  Y. and Watari,  T. and Ohdachi,  S. and Sakakibara,  S. and Yamamoto,  S. and Inagaki,  S. and Narihara,  K. and Osakabe,  M. and Nagaoka,  K. and Narushima,  Y. and Watanabe,  K.Y and Funaba,  H. and Goto,  M. and Ikeda,  K. and Ito,  T. and Kaneko,  O. and Kubo,  S. and Murakami,  S. and Minami,  T. and Miyazawa,  J. and Nagayama,  Y. and Nishiura,  M. and Oka,  Y. and Sakamoto,  R. and Shimozuma,  T. and Takeiri,  Y. and Tanaka,  K. and Tsumori,  K. and Yamada,  I. and Yoshinuma,  M. and Kawahata,  K. and Komori,  A. and LHD, Experiment Group},
 issue = {Issue 14},
 journal = {Physical Review Letters},
 month = {Oct},
 note = {Reversed-shear Alfv?n eigenmodes were observed for the first time in a helical plasma having negative q0′′ (the curvature of the safety factor q at the zero shear layer). The frequency is swept downward and upward sequentially via the time variation in the maximum of q. The eigenmodes calculated by ideal MHD theory are consistent with the experimental data. The frequency sweeping is mainly determined by the effects of energetic ions and the bulk pressure gradient. Coupling of reversed-shear Alfv?n eigenmodes with energetic ion driven geodesic acoustic modes generates a multitude of frequency-sweeping modes.},
 title = {Observation of Reversed-Shear Alfve ́n Eigenmodes Excited by Energetic Ions in a Helical Plasma},
 volume = {Vol.105},
 year = {2010}
}