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Experimental study of large power lower hybrid current drive on HT-7 tokamak

Xu Qiang Gao Xiang Shan Jia-Fang Hu Li-Qun Zhao Jun-Yu

Experimental study of large power lower hybrid current drive on HT-7 tokamak

Xu Qiang, Gao Xiang, Shan Jia-Fang, Hu Li-Qun, Zhao Jun-Yu
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  • Received Date:  14 January 2008
  • Accepted Date:  13 May 2008
  • Published Online:  20 December 2009

Experimental study of large power lower hybrid current drive on HT-7 tokamak

  • 1. 中国科学院等离子体物理研究所,合肥 230031

Abstract: Large power current drive of lower hybrid wave (LHW) was performed (PLHW 100—800 kW at 2.45 GHz) recently in the HT-7 tokamak. The lower hybrid current drive (LHCD) efficiency is studied for different injected powers and for different densities. Improved particle confinement is observed by application of LHCD as characterized by an increase of central line average electron density and decrease of Dα emission. The particle confinement time τp increased about 1.5 times compared with ohm discharge. The dependence of energy confinement time τE on plasma density and LHW power is experimentally studied in detail.

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