@article{oai:nagoya.repo.nii.ac.jp:00012286, author = {Ito, T. and Toi, K. and Matsunaga, G. and Isobe, M. and Nagaoka, K. and Takeuchi, M. and Akiyama, T. and Matsuoka, K. and Minami, T. and Nishimura, S. and Okamura, S. and Shimizu, A. and Suzuki, C. and Yoshimura, Y. and Takahashi, C.}, issue = {9}, journal = {PHYSICS OF PLASMAS}, month = {Sep}, note = {Stable toroidicity-induced Alfvén eigenmodes (TAEs) with low toroidal mode number (n = 1 and n = 2) were excited by application of alternating magnetic field perturbations generated with a set of electrodes inserted into the edge region of neutral beam injection heated plasmas on the Compact Helical System [ K. Nishimura, K. Matsuoka, M. Fujiwara et al., Fusion Technol. 17, 86 (1990) ]. The gap locations of TAEs excited by the electrodes are in the plasma peripheral region of ρ>0.7 (ρ is the normalized minor radius) where energetic ion drive is negligibly small, while some AEs are excited by energetic ions in the plasma core region of ρ<0.4. The damping rate of these stable TAEs derived from plasma responses to applied perturbations is fairly large, that is, ∼ 9% to ∼ 12% of the angular eigenfrequency. This large damping rate is thought to be dominantly caused by continuum damping and radiative damping.}, pages = {092105--092105}, title = {Excitation of stable Alfvén eigenmodes by application of alternating magnetic field perturbations in the Compact Helical System}, volume = {16}, year = {2009} }