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(OV5/4) Overview on Chinese Tokamak Experimental Progress

J. K. Xie¹⁾, J. Li¹⁾, HT-7 Team¹⁾, Y. Liu²⁾, HL-1M Team²⁾, Y. Z. Wen³⁾, KT-5C Team³⁾, L. Wang⁴⁾, CT-6B Team^4)
 
1) Institute of Plasma Physics, Chinese Academy of Sciences, P.O.Box 1126 Hefei, China, 230031
²⁾ SouthWestern Institue of Physics, ChengDu, China
³⁾ University of Sciences and Technology of China, Hefei, China
⁴⁾ Institute of Physics, Chinese Academy of Sciences, Beijing, China

Abstract.  Tokamak experiment research in China has made important progress. The main efforts subjected to quasi-steady state operation, LHCD, plasma heating with ICRF, IBW, NBI, ECRH, fueling with pellet and supersonic molecular beam, first wall conditioning technique. Plasma parameters in experiments were much improved, such as n_e = 8×10¹⁹m^{- 3}, plasma pulse >10Sec. ICRF boronization and conditioning made Z_eff close to unit. Steady state full LH wave current drive has been achieved for more than 3 seconds. LHCD ramp up and recharge have also been demonstrated. The Best $\eta_{\mathrm{CD}}^{\mathrm{exp}}$ $\approx$ 0.5(1 + 0.085 exp(4.8(B_T - 1.45))n_eI_CDR_p/P_LH = 10¹⁹m^{- 2}A/W. Quasi steady state H-mode like plasma with density close to Greenwald limit was obtained by LHCD, in which energy confinement time was nearly 5 times longer than the Ohmic case. The synergy between IBW, pellet and LHCD was tested. Research on the mechanism of macro-turbulence has been extensively carried out experimentally. Ac operation of tokamak was successfully demonstrated.

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