High Bootstrap Current Fraction during the Synergy of LHCD and IBW on the HT-7 Tokamak
ZHANG Xian-Mei, WAN Bao-Nian, WU Zhen-Wei, HT-7 Team
1Department of Physics, East China University of Science and Technology, Shanghai 200237
2Institute of Plasma Physics, Chinese academy of Sciences, PO Box 1126, Hefei 230031
High Bootstrap Current Fraction during the Synergy of LHCD and IBW on the HT-7 Tokamak
ZHANG Xian-Mei;WAN Bao-Nian;WU Zhen-Wei;HT-7 Team
1Department of Physics, East China University of Science and Technology, Shanghai 200237
2Institute of Plasma Physics, Chinese academy of Sciences, PO Box 1126, Hefei 230031
Abstract： More than 70% of the total plasma current is sustained by the bootstrap current and current drive during the synergy of lower hybrid current driving (LHCD) and ion Berstein wave (IBW) heating on the HT-7 tokamak. The lower hybrid non-inductive current source is off-axis and well localized, and more than 35% bootstrap current plasma has been obtained. The IBW in controlling electron pressure profile can be integrated into the LHCD target plasma. The largest steep gradient of the electron pressure profile in the region ρ～0.5-0.7 mostly comes from the electron temperature profile, which may induce the large fraction bootstrap current. The large off-axis bootstrap current can help to create negative magnetic shear, and the good plasma confinement is achieved.
ZHANG Xian-Mei;WAN Bao-Nian;WU Zhen-Wei;HT- Team. High Bootstrap Current Fraction during the Synergy of LHCD and IBW on the HT-7 Tokamak[J]. 中国物理快报, 2005, 22(6): 1468-1470.
ZHANG Xian-Mei, WAN Bao-Nian, WU Zhen-Wei, HT- Team. High Bootstrap Current Fraction during the Synergy of LHCD and IBW on the HT-7 Tokamak. Chin. Phys. Lett., 2005, 22(6): 1468-1470.
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 
