@article{oai:niigata-u.repo.nii.ac.jp:00002491,
 author = {Tanaka, H. and Ando, A. and Ogura, K. and Ide, S. and Iida, M. and Oho, K. and Ozaki, S. and Iwamura, K. and Yamazaki, A. and Nakamura, M. and Maekawa, T. and Terumichi, Y. and Tanaka, S.},
 issue = {11},
 journal = {Physical Review Letters, Physical Review Letters},
 month = {Mar},
 note = {Electron cyclotron current drive (ECCD) at the second harmonic (ω=2Ω_e) is demonstrated for two types of plasma in the WT-3 tokamak. When microwave power P_EC is injected into a plasma after Ohmic heating (OH) power is shut down, the plasma current is sustained and ramped up by the EC wave only. Here 2Ω_e EC-driven current is generated by 2Ω_e EC heating of an energetic electron tail existing in the OH plasma. Further, when P_EC is injected into a microwave discharge plasma, 2Ω_e EC-driven plasma current is started up and 2Ω_3 ECCD plasma is formed without OH power. The 2Ω_e ECCD efficiency is the same order as that at ω=Ω_e, but the 3Ω_e EC-driven current is not generated, in contrast with the theoretical prediction.},
 pages = {1033--1036},
 title = {Electron-Cyclotron Current Drive at the Second Harmonic in the WT-3 Tokamak},
 volume = {60},
 year = {1988}
}