Investigation of core MHD activities in the high βN plasmas in EAST

POSTER

Abstract

Improved H-mode plasmas with high normalized beta (βN > 1.6) have been achieved on EAST tokamak. Weak temperature and density internal transport barriers (ITB) were observed. The main focus is on the influence of the core MHD activities, including fishbones and sawteeth on plasma performance. The electron temperature and the density profile evolutions show both temperature and density ITB maintained during the fishbone activities. Detailed comparisons of the kinetic profiles show trivial changes in the core region during fishbone activities but significant decrease due to sawteeth crash, which also gives possibility to trigger neoclassical tearing modes (NTMs). The safety factor (q) profile, confined by the Faraday rotation measurements from the polarimeter/interferometer (POINT) system on EAST, represents that a flat q profile with q0 close to unity can be maintained and a 1/1 fishbone simultaneously exist. Detailed discussions of plasma performance under the same external control parameters will be studied and discussed.

Presenters

  • 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

Authors

  • 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

  • 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

  • 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

  • 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

  • Di Jiang

    Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China, University of Science and Technology of China, Hefei 230029, China

  • Hao Qu

    Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China, University of Science and Technology of China, Hefei 230029, 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

  • 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

  • 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

  • Yinxian Jie

    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