Abstract： High time resolution measurements of the electrostatic fluctuations, radial electric field Er and turbulence-induced electron flux Γe have been performed across the transition of lower-hybrid-current-drive-improved confinement with a graphite Langmuir probe array at the last closed flux surface of HT-7 tokamak. The decrease of Γe is dominated by the suppression of fluctuation levels, which follows the change of Er. A reversion of the poloidal propagation direction of turbulence demonstrates that the poloidal propagation is dominated by Er x BФ drift. The enhancement of poloidal coherence accompanies the fluctuation suppression, which suggests the subtle variation of turbulence features.
XU Guo-Sheng;WAN Bao-Nian;SONG Mei;LING Bi-Li;KUANG Guang-Li;DING Bo-Jiang. Observation of Lower Hybrid Current Drive Improved Confinement
with a Graphite Probe at the Last Closed Flux Surface of the HT-7 Tokamak[J]. 中国物理快报, 2002, 19(9): 1316-1318.
XU Guo-Sheng, WAN Bao-Nian, SONG Mei, LING Bi-Li, KUANG Guang-Li, DING Bo-Jiang. Observation of Lower Hybrid Current Drive Improved Confinement
with a Graphite Probe at the Last Closed Flux Surface of the HT-7 Tokamak. Chin. Phys. Lett., 2002, 19(9): 1316-1318.
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.
2002, Vol. 19 
