Abstract： Lower hybrid (LH) wave current drive efficiency on our HT-7 tokamak has been investigated based on the hot electrical conductivity theory. The interaction of the residual toroidal electric field with fast electrons has been included in the determination of current drive efficiency. The LH wave power scan was performed in the plasma parameter ranges of Ip=50-156kA, ňe=0.5×101.6-1.6× 1019m-3, PLH=50-350kW. The current drive efficiency is derived to be about 0.1× 1019-0.4×1019Am-2W-1 on the HT-7 tokamak, which depends on the electron density and the LH wave phase velocity. At the electron density of about 1.5×1019m-3, with the LH wave parallel refraction index peaked at 1.8, the highest current drive efficiency was obtained. A more generally normalized method is introduced to analyse the experimental data, which combines all the data in one curve. The normalized parameters are independent of the plasma parameters.
(Plasma heating by DC fields; ohmic heating, arcs)
引用本文:
CHEN Zhong-Yong;WAN Bao-Nian;SHI Yue-Jiang;HU Li-Qun;XU Han-Dong; LI Guo-Chao. Lower Hybrid Wave Current Drive Efficiency on the HT-7 Tokamak[J]. 中国物理快报, 2005, 22(4): 900-903.
CHEN Zhong-Yong, WAN Bao-Nian, SHI Yue-Jiang, HU Li-Qun, XU Han-Dong, LI Guo-Chao. Lower Hybrid Wave Current Drive Efficiency on the HT-7 Tokamak. Chin. Phys. Lett., 2005, 22(4): 900-903.
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.
2005, Vol. 22 
