Online ISSN : 1884-9571
Print ISSN : 0451-2375
ISSN-L : 0451-2375
WT-3トカマクにおける高い周波数帯での低域混成波電流駆動

ジャーナル フリー

1989 年 61 巻 4 号 p. 241-257

The lower-hybrid current drive (LHCD) experiments with a high frequency range such as ω= (2-3) × (ΩeΩi) 1/2 on the WT-3 tokamak are reported. Experimental results on current sustainment and ramp-up in the low density region are basically consistent with the predictions based on the quasi-linear theory with the finite fast electron confinement time. But the density limit for LHCD is lower than that expected from ω2-scaling. It seems that the density limit is given by ωpe2e2=1 for the high frequency range. It is concluded that increase of ω is not effective to increase the density limit for LHCD in the high frequency range.