@article{oai:nifs-repository.repo.nii.ac.jp:00000348,
 author = {TOI,  Kazuo and YAMAMOTO,  Satoshi and TAKECHI,  Manabu and TAKECHI,  Manabu and NAKAJIMA,  Noriyoshi and ISOBE,  Mitsutaka and TAKAGI,  Shoji and TAKAGI,  Shoji and MATSUNAGA,  Go and OHDACHI,  Satoshi and SAKAKIBARA,  Satoru and OSAKABE,  Masaki and SASAO,  Mamiko and KOTANI,  Jyunichi and KOTANI,  Jyunichi and CHS, and LHD Experimental Groups and TOI,  Kazuo and YAMAMOTO,  Satoshi and NAKAJIMA,  Noriyoshi and ISOBE,  Mitsutaka and MATSUNAGA,  Go and OHDACHI,  Satoshi and SAKAKIBARA,  Satoru and OSAKABE,  Masaki and SASAO,  Mamiko},
 journal = {Journal of Plasma and Fusion Research SERIES, Journal of Plasma and Fusion Research SERIES},
 month = {Jan},
 note = {Excitation of energetic-ion-driven Alfv6n eigenmodes (AEs) and their impact on energetic ion confinement are widely and intensively studied in helical devices such as CHS and LHD as well as major tokamaks. The excitation of AEs sensitively depends on the parameter space defined by the averaged beam beta <ft11> and the velocity ratio V6nlV6 (V611 : injected beam ion velocity, Va: Alfv6n velocity). In LHD, these two relevant parameters are widely scanned without suffering from current disruptions. So far, toroidicity induced AE (TAE), global AE (GAE) and energetic particle mode (EPM) or resonant TAE (R-TAE) were identified during tangential neutral beam injection (NBI) in CHS and LHD. Moreover, a new coherent mode with the frequency by about 8 times higher than the TAE frequency was observed in NBI heated plasmas of LHD at low magnetic field (<0.6T). This mode may be induced by helical field components of the confinement field. Nonlinear phenomena of bursting amplitude modulation and fast frequency chirping are clearly seen for TAEs and EPMs in CHS and LHD. EPMs in CHS and bursting TAEs in LHD enhance radial transport of energetic ions in certain plasma conditions.},
 title = {Impact of Energetic Ion Driven Global Modes on Toroidal Plasma Confinements},
 volume = {Vol.5},
 year = {2002}
}