Investigation of core MHD activities in the high β<sub>N</sub> 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.

*This work was supported by the National Magnetic Confinement Fusion Program of China with contract No. 2014GB106002 and No. 2014GB106003 and the National Nature Science Foundation of China with contract No. 11675211, No. 11775267 and No. 11475221.

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