Investigation of energy transport of high βN plasma on EAST tokamak

POSTER

Abstract

In the past few years, the high normalized beta (βN >1.8) discharges have been realized on the EAST tokamak with neutral beam injection(NBI) and lower hybrid waves(LHW). It is found that LHW most deposits in the outer region and drives small current fraction and does small effect on the increase of βN. Sustained high βN (~ 1.9) plasmas have been achieved on EAST tokamak with an internal transport barrier (ITB) in all channels. The central flat q profile with q(ρ) ~ 1 at ρ < 0.3 region and edge safety factor q95 = 4.7. Linear analysis shows that the high-k modes instability (electron temperature gradient driven modes) is suppressed in the core region when the ITB is formed. Turbulence transport code TGLF[VX model, Jian et al., Nucl. Fusion 58, 016011(2018)] gives good agreements on temperature profiles prediction before the ITB formation. However, it could not reproduce the experimental temperature profiles when exist internal transport barriers. The reason is that the fishbone instability appears in the discharge, which could redistribute the fast ion and affect the energy transport while it is not considered in TGLF. The relationship between fishbone activity and the energy transport needs to be investigated for these high βN discharges in order to validate this conjecture.

Presenters

  • Muquan Wu

    Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, China, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Prov, Advanced Energy Research Center, Shenzhen University, Key Laboratory of Optoelectronic Devices and System of Ministry of Education and Guangdong Province, College of Optoelec, Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, People’s Republic of China, ASIPP

Authors

  • Muquan Wu

    Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, China, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Prov, Advanced Energy Research Center, Shenzhen University, Key Laboratory of Optoelectronic Devices and System of Ministry of Education and Guangdong Province, College of Optoelec, Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, People’s Republic of China, ASIPP

  • Guoqiang Li

    Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China, ASIPP, Institute of Plasma Physics, Chinese Academy of Science, Hefei, Anhui, 230031, P.R. China, the Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, Anhui 230031, People’s Republic of China

  • X. Gao

    Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China, Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, China, Chinese Academy of Sciences, Advanced Energy Research Center, Shenzhen University, Institute of Plasma Physics, Chinese Academy of Science, Hefei, Anhui, 230031, P.R. China, Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, People’s Rep, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, Anhui 230031, People’s Republic of China, Advanced Energy Research Center, Shenzhen University, ASIPP

  • Kai Li

    Institute of Plasma Physics, Chinese Academy of Sciences, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, Anhui 230031, People’s Republic of China

  • Xiang Zhu

    Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, China, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Prov, Shenzhen University, Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, People’s Republic of China

  • Qilong Ren

    ASIPP

  • Long Zeng

    Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China, Institute of Plasma Physics, Chinese Academy of Sciences, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, Anhui 230031, People’s Republic of China

  • Haiqing Liu

    Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China, Institute of Plasma Physics, Chinese Academy of Sciences, Institute of Plasma Physics Chinese Academy Of Sciences, ASIPP, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, Anhui 230031, People’s Republic of China

  • Shouxin Wang

    ASIPP, Institute of Plasma Physics Chinese Academy Of Sciences

  • Tao Zhang

    ASIPP, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, Anhui 230031, People’s Republic of China

  • Yao Yang

    Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China, Institute of Plasma Physics, Chinese Academy of Science, Hefei, Anhui, 230031, P.R. China, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, Anhui 230031, People’s Republic of China

  • Bo Lyu

    Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China, Chinese Academy of Sciences, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, Anhui 230031, People’s Republic of China

  • Qing Zang

    Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China, Institute of Plasma Physics, Chinese Academy of Sciences, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, Anhui 230031, People’s Republic of China

  • Xianzu Gong

    Institute of Plasma Physics, Chinese Academy of Sciences, ASIPP, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, Anhui 230031, People’s Republic of China