Jiangang Li et al 2007 Nucl. Fusion 47 1071 doi:10.1088/0029-5515/47/9/001
Jiangang Li, Jiarong Luo, Shaojie Wang, Peng Fu, Biao Shen, Fukun Liu, Baonian Wan, Jiafang Shan, Guosheng Xu, Juan Huang, Jun Yu, Jiansheng Hu, Qiping Yuan, Yeming Hu and HT-7 Team
Show affiliationsA quasi-steady-state alternating current operation assisted by lower hybrid wave (LHW) was achieved on a HT-7 superconducting tokamak with plasma current of Ip = 125 kA, line-averaged density of 1.5 × 1019 m−3, electron temperature of Te = 500 eV and 30–50 s plasma duration. Plasma current was sustained and smoothly transferred from one direction to the other without loss of ionization. Plasma position control, LHW assistance, strong gas puffing and good wall condition are the key issues to have a smooth transition of plasma current. Our modelling results show that current reversal equilibrium configuration with two oppositely flowing currents in the high-field-side and the low-field-side during current reversal exists. This is in agreement with experimental measurements.
Issue 9 (September 2007)
Received 31 December 2006, accepted for publication 13 June 2007
Published 15 August 2007
Jiangang Li et al 2007 Nucl. Fusion 47 1071
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