Abstract： In this letter, a model for active suppressing tokamak edge turbulence and hence inducing the L-mode to H-mode transition with lower-hybrid wave (LHW) is proposed. The model includes the two contents: (a) The poloidal sheared flow of plasma is generated by the ponderomotive potential and induced magnetization acting on a tokamak plasma resulting from the oscillating electric field of the injected LHW. (b) During the time the LHW is injected into tokamak edge, the edge turbulence and the LHW-generated plasma poloidal flow compete with each other; if the shear of plasma poloidal flow is large enough to suppress the edge turbulence, the confinement will be remarkably improved and hence the system will enter the H operating mode. This model leads us to find that the threshold LHW power required for edge-turbulence suppression is proportional to A(ω) ≡ (ω / ωLH )2 |(ω / ωLH )2-1|, which enables us to explain the experiment in the JT-60 tokamak with lower-hybrid current drive.
QIU Xiaoming (X. M. Qiu);BAI Lin (L. Bai). Model on L- to H-Mode Transition Driven with Lower-Hybrid Wave[J]. 中国物理快报, 1994, 11(11): 677-680.
QIU Xiaoming (X. M. Qiu), BAI Lin (L. Bai). Model on L- to H-Mode Transition Driven with Lower-Hybrid Wave. Chin. Phys. Lett., 1994, 11(11): 677-680.
YANG Qing-Wei;ZHOU Hang-Yu;FENG Bei-Bin;LIU Yi;PAN Yu-Dong;LI Wei;DUAN Xu-Ru;CHEN Wei;CUI Zheng-Ying;JI Xiao-Quan;DING Xuan-Tong;HL-A team. A New Criterion for Disruption Prediction on HL-2A[J]. 中国物理快报, 2006, 23(4): 891-894.
1994, Vol. 11 
